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NSR database version of April 11, 2024.

Search: Author = B.Lommel

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2024KH02      Phys.Rev. C 109, 034311 (2024)

J.Khuyagbaatar, R.A.Cantemir, Ch.E.Dullmann, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, A.Yakushev

Decay properties of the neutron-deficient isotope ²⁴²Es

doi: 10.1103/PhysRevC.109.034311
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2023CO04      Phys.Rev. C 107, L021301 (2023)

D.M.Cox, A.Saamark-Roth, D.Rudolph, L.G.Sarmiento, R.M.Clark, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, B.G.Carlsson, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. II. Fine structure in odd-A ²⁸⁹Fl

RADIOACTIVITY ²⁸⁹Fl(α) [from ²⁴⁴Pu(⁴⁸Ca, X), E=6.02 MeV/nucleon]; ²⁸⁵Cn(α) [from ²⁸⁹Fl(α)]; ²⁸¹Ds(α) [from ²⁸⁵Cn(α)]; ²⁷⁷Hs(SF) [from ²⁸¹Ds(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T_1/2, branching ratios, hindrance factor. ²⁸⁹Fl, ²⁸⁵Cn, ²⁸¹Ds; deduced J, π and δ assignments based on the derived decay path. Comparison with structure calculations based on the symmetry-conserving configuration mixing theory. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.L021301
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2023JE01      Phys.Lett. B 837, 137641 (2023)

D.Y.Jeung, D.J.Hinde, M.Dasgupta, C.Simenel, E.C.Simpson, K.J.Cook, H.M.Albers, J.Buete, I.P.Carter, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, N.Lobanov, B.Lommel, C.Mokry, E.Prasad, J.Runke, C.Sengupta, J.F.Smith, P.Thorle-Pospiech, N.Trautmann, K.Vo-Phuoc, J.Walshe, E.Williams, A.Yakushev

Sequential fission and the influence of ²⁰⁸Pb closed shells on the dynamics of superheavy element synthesis reactions

NUCLEAR REACTIONS ²³⁸U, ²⁴⁴Pu, ²⁴⁸Cm, ²⁴⁹Cf(⁵⁰Ti, F), E ∼ 230 MeV; measured fission fragments. ²⁰⁸Pb; deduced σ, binary quasifission mass spectra, sequential fission survival probabilities. The ANU Heavy Ion Accelerator Facility.

doi: 10.1016/j.physletb.2022.137641
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2023LO03      Eur.Phys.J. A 59, 14 (2023)

B.Lommel, C.E.Dullmann, B.Kindler, D.Renisch

Status and developments of target production for research on heavy and superheavy nuclei and elements

doi: 10.1140/epja/s10050-023-00919-7
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2023SA03      Phys.Rev. C 107, 024301 (2023)

A.Saamark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, M.Albertsson, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.AAberg, H.M.Albers, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, Ch.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along flerovium decay chains. III. Details on experiment, analysis, ²⁸²Cn, and spontaneous fission branches

RADIOACTIVITY ^{290,288,286,284}Fl(α)(SF) [from ²⁴⁴Pu(⁴⁸Ca, X), E=6.02 MeV/nucleon]; ²⁸²Cn(α)(SF) [²⁸⁶Fl(α)]; ²⁸⁴Cn(α)(SF) [from ²⁸⁸Fl(α)]; ²⁸⁶Cn(α)(SF) [²⁹⁰Fl(α)]; ²⁸²Ds(α)(SF) [from ²⁸⁶Cn(α)]; ²⁸⁰Ds(α)(SF) [from ²⁸⁴Cn(α)]; measured decay products, Eα, Iα, Eβ, Iβ αβ-coin, αα-coin, (fragment)αα-coin; deduced Q-values, T_1/2, branching ratios, hindrance factor. ²⁸²Cn; deduced levels, J, π, T_1/2 of excited states, transition rates, monopole transition strengths. Comparison to macroscopic-microscopic finite-range liquid-drop model, self-consistent Hartree-Fock-Bogoliubov calculations and other experimental data. Gas-filled recoil separator TASCA was used to transmit, select, and focus the flerovium ions into an upgraded version of the TASISpec decay station consisting of implantation DSSD, veto DSSD and set of HPGe detectors (GSI).

doi: 10.1103/PhysRevC.107.024301
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2022BR08      Phys.Rev. C 106, 014602 (2022)

A.Bronis, F.P.Hessberger, S.Antalic, B.Andel, D.Ackermann, S.Heinz, S.Hofmann, J.Khuyagbaatar, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, A.G.Popeko, B.Streicher, B.Sulignano, J.Uusitalo, M.Venhart, A.V.Yeremin

Decay studies of new isomeric states in ²⁵⁵No

RADIOACTIVITY ²⁵⁰Fm, ^252,254,255No(α)[from ²⁰⁸Pb(⁴⁸Ca, X), E=213.6, 218.4 MeV]; measured Eα. ^255mNo(IT); measured Eγ, γ(ce)-coin, γ(ER)-coin; deduced levels, three micro-sec isomers in ²⁵⁵No, J, π, T_1/2, multipolarities, Nilsson configurations. Comparison with level scheme of ²⁵⁷Rf from the decay of its isomer, and with theoretical calculations based on the mean-field models. ^253mNo, ^255mRf, ^257mRf; deduced Nilsson configurations of high-K 3-qp isomeric states in N=151 and N=153 isotopes. Systematics of experimental and theoretical single-particle states in N=153 isotones of ²⁴⁷Pu, ²⁴⁹Cm, ²⁵¹Cf, ²⁵³Fm, ²⁵⁵No, ²⁵⁷Rf, ²⁵⁹Sg, ²⁶¹Hs.

doi: 10.1103/PhysRevC.106.014602
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2022HU09      Phys.Lett. B 833, 137345 (2022)

H.Huang, W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, Z.H.Li, C.Y.Guo, A.E.Barzakh, P.Van Duppen, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, J.G.Cubiss, B.Ding, D.T.Doherty, Z.Favier, F.Giacoppo, T.H.Huang, B.Kindler, F.G.Kondev, T.Lauritsen, J.G.Li, G.S.Li, B.Lommel, H.Y.Lu, M.Al Monthery, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, Q.B.Zeng, X.H.Yu, F.F.Zeng, X.H.Zhou

First observation of the decay of the 13/2⁺ isomer in ¹⁸³Hg and B(M2) systematics of neutron transitions across the nuclear chart

RADIOACTIVITY ¹⁸³Hg(α) [from ¹⁸⁷Pb α decay]; ^187mPb(α) [from ¹⁴²Nd(⁵⁰Cr, 3n2pγ), E=255 MeV, followed by separation of fragments using Argonne gas-filled analyzer (AGFA) at the ATLAS-ANL facility]; measured reaction products, evaporation residues (EVRs), Eα, Iα, (EVR)α-correlations, αγ(t), Eγ, Iγ, x rays, T_1/2 using double-sided silicon strip detector (DSSD), and four HPGe clover detectors. ^183,183mHg; deduced levels, isomer, J, π, T_1/2 of g.s. and isomer, α branching ratio, K-conversion coefficient, multipolarity, B(M2), Nilsson configurations. ^187mPb; deduced T_1/2. Systematics of decay schemes of 13/2+ isomers in ^{175,177,179,181,183,185}Hg. Systematics of B(M2) values for 7/2-, 9/2+, 11/2- and 13/2+ isomers in even-Z, odd-N nuclei: ²⁵Mg, ³³Si, ^33,35S, ³⁷Ar, ³⁹Ca, ⁵⁹Cr, ⁶¹Fe, ^63,67Ni, ^63,65,67Zn, ^67,69,71Ge, ^69,71Se, ^97,99Mo, ^99,101,103Ru, ^103,105Pd, ^107,109Cd, ^{109,111,113,115}Sn, ¹⁵³Yb, ¹⁶¹Hf, ¹⁶³W, ¹⁶³Os, ^171,189,191Pt, ^{181,183,201,203,205}Hg, ²⁰⁹Pb, ^205,207,211Po, ^207,209,213Rn, ^209,211Ra, ^211,213Th.

doi: 10.1016/j.physletb.2022.137345
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2022KH08      Phys.Rev. C 106, 024309 (2022)

J.Khuyagbaatar, H.Brand, Ch.E.Dullmann, F.P.Hessberger, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, Yu.Nechiporenko, Yu.N.Novikov, B.Schausten, A.Yakushev

Search for fission from a long-lived isomer in ²⁵⁰No and evidence of a second isomer

RADIOACTIVITY ^250,250mNo(α), (SF)[from ²⁰⁴Pb(⁴⁸Ca, 2n), E=218.9 MeV, followed by separation of fragments using TASCA system at GSI facility]; measured evaporation residues (ERs), (ER)α- and (ER)(fission events)-correlations, T_1/2 of g.s. and two isomers using double-sided silicon strips detectors, and a multiwire proportional counter (MWPC). ^250,250mNo; deduced T_1/2, upper limit of fission (SF) branching of 23-μs isomer, new shorter-lived high-K isomer. Discussed nonobservation of fission branching of the long-lived isomer, and fission-hindrance factor due to K-quantum number with theoretical predictions from various semiempirical approaches.

doi: 10.1103/PhysRevC.106.024309
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8050. Data from this article have been entered in the XUNDL database. For more information, click here.

2022ZH22      Phys.Lett. B 829, 137129 (2022)

W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, H.Huang, Z.H.Li, J.G.Li, C.Y.Guo, D.T.Doherty, A.E.Barzakh, P.Van Duppen, J.G.Cubiss, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, B.Ding, Z.Favier, F.Giacoppo, T.H.Huang, X.H.Yu, B.Kindler, F.G.Kondev, T.Lauritsen, G.S.Li, B.Lommel, H.Y.Lu, M.Al Monthery, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, Q.B.Zeng, X.H.Zhou

First observation of a shape isomer and a low-lying strongly-coupled prolate band in neutron-deficient semi-magic ¹⁸⁷Pb

NUCLEAR REACTIONS ¹⁴²Nd(⁵⁰Cr, 3n2p)¹⁸⁷Pb, E=255 MeV beam from ATLAS-ANL facility, followed by separation of evaporation residues (EVRs) using Argonne Gas-Filled Analyzer; measured Eα, Eγ, Iγ, x rays, αγ-coin, γγ-coin, T_1/2 of a new low-energy microsec-isomer by αγ(t) using Gammasphere for γ detection and double-sided silicon strip detector (DSSD) for EVRs and α particles. Recoil-decay tagging (RDT) and isomer-decay tagging (IDT) methods. ¹⁸⁷Pb; deduced high-spin levels, J, π, isomer, K-conversion coefficient, multipolarity, bands, B(E2), B(M1)/B(E2), triple-shape coexistence at low energy. Comparison with band structure in ¹⁸⁵Hg. Systematics of aligned angular momenta plots and experimental Routhians for bands in ^183,185Hg, ¹⁸⁷Pb. ¹⁸⁴Hg, ¹⁸⁶Pb, ¹⁸⁷Tl; observed γ rays. ^186,187m,188Pb; observed α-decay peaks.

doi: 10.1016/j.physletb.2022.137129
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2022ZH46      Phys.Rev. C 106, 024317 (2022)

W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, H.Huang, Z.H.Li, J.G.Li, C.Y.Guo, A.E.Barzakh, P.Van Duppen, M.Al Monthery, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, J.G.Cubiss, B.Ding, D.T.Doherty, Z.Favier, F.Giacoppo, T.H.Huang, B.Kindler, F.G.Kondev, T.Lauritsen, G.S.Li, B.Lommel, H.Y.Lu, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, X.H.Yu, Q.B.Zeng, X.H.Zhou

Identification of excited states in ¹⁸⁸Bi and ¹⁸⁸Po

NUCLEAR REACTIONS ¹⁴²Nd(⁵⁰Cr, 3np)¹⁸⁸Bi, (⁵⁰Cr, 4n)¹⁸⁸Po, E=255 MeV; measured evaporation residues (EVRs), Eα, Eγ, Iγ, x rays, (EVR)γ-coin, αγ-coin, γγ-coin, using four clover HPGe detectors, Gammasphere array with 64 Compton-suppressed HPGe detectors, and DSSD and DSSD+Sibox at the ATLAS-ANL accelerator facility. ^{186,187,187m,188}Pb, ^189,189mBi; deduced recoil-decay tagging (RDT) γ-ray yields. ¹⁸⁸Bi; deduced levels, J, π, isomer, T_1/2 and decay modes of isomer, K-conversion coefficients, multipolarities, configurations. ¹⁸⁸Po; deduced energy of the first 2+ level. ¹⁸⁶Pb; deduced levels, J, π. ^183,184,186Hg, ^{186,187,187m,188}Pb, ^188,189,189mBi; observed Eα. Systematics of 9/2-, 1/2+, 7/2- and 13/2+ level energies in ^{185,187,189,191,193,195}Bi, and those of first 2+, 4+, 6+ and 8+, second 0+, 2+ and 4+ in ^{188,190,192,194,196,198,200,202,204,206,208,210}Po.

doi: 10.1103/PhysRevC.106.024317
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Data from this article have been entered in the XUNDL database. For more information, click here.

2021BA41      Phys.Lett. B 820, 136601 (2021)

K.Banerjee, D.J.Hinde, M.Dasgupta, J.Sadhukhan, E.C.Simpson, D.Y.Jeung, C.Simenel, B.M.A.Swinton-Bland, E.Williams, L.T.Bezzina, I.P.Carter, K.J.Cook, H.M.Albers, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, C.Mokry, E.Prasad, J.Runke, N.Schunck, C.Sengupta, J.F.Smith, P.Thorle-Pospiech, N.Trautmann, K.Vo-Phuoc, J.Walshe, A.Yakushev

Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)

NUCLEAR REACTIONS ²⁰⁸Pb, ²⁴⁴Pu(⁴⁸Ca, X), ²³²Th(⁵⁴Cr, X)Fl, E not given; analyzed available data; deduced masses, σ(θ). Comparison with microscopic calculations of Helmholtz free energy surfaces (FES).

doi: 10.1016/j.physletb.2021.136601
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2021GA34      Bull.Rus.Acad.Sci.Phys. 85, 1080 (2021)

E.I.Galkina, E.M.Kozulin, G.N.Knyazheva, I.M.Itkis, A.A.Bogachev, I.N.Diatlov, M.Cheralu, D.Kumar, N.I.Kozulina, K.V.Novikov, A.N.Pan, I.V.Pchelintsev, I.V.Vorobiev, W.H.Trzaska, S.Heinz, B.Lommel, E.Vardaci, S.Spinosa, A.Di Nitto, A.Pulcini, C.Borcea, I.Harca

Investigating Mass-Energy Distributions of Fragments Produced in the ³²S + ²³²Th → ²⁶⁴Sg Reaction at Energies Below and Near the Coulomb Barrier

NUCLEAR REACTIONS ²³²Th(³²S, X)²⁶⁴Sg, E=165, 181, 200 MeV; measured reaction products; deduced mass-energy distributions of fragments, contribution from the quasifission process. CORSET double-arm time-of-flight spectrometer.

doi: 10.3103/S1062873821100154
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2021KH03      Phys.Rev. C 103, 064303 (2021)

J.Khuyagbaatar, H.Brand, R.A.Cantemir, Ch.E.Dullmann, M.Gotz, S.Gotz, F.P.Hessberger, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, A.Yakushev

Isomeric states in ²⁵⁶Rf

RADIOACTIVITY ^256mRf(IT)[from ^207,208Pb(⁵⁰Ti, xn), E=237.5, 242.5 MeV at the Trans-Actinide Separator and Chemistry Apparatus (TASCA) at GSI and implanted in double-sided silicon strip detector (DSSD)]; measured evaporation residues (ER) and fission (ER-FI) and ER-conversion electrons-fission (ER-CE-FI) correlated events, half-lives of the two isomers from correlated decay curves by a triggerless method. ²⁵⁶Rf; deduced two isomeric activities a low-spin and a high-spin, population rates, two-quasiparticle configurations with K-quantum number assignments, third isomer in ²⁵⁶Rf in earlier literature not observed perhaps due to low statistics.

doi: 10.1103/PhysRevC.103.064303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8037. Data from this article have been entered in the XUNDL database. For more information, click here.

2021KH07      Phys.Rev. C 104, L031303 (2021)

J.Khuyagbaatar, H.Brand, R.A.Cantemir, Ch.E.Dullmann, F.P.Hessberger, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, A.Yakushev

Spontaneous fission instability of the neutron-deficient No and Rf isotopes: The new isotope ²⁴⁹No

RADIOACTIVITY ^253,253mRf(SF); ²⁵³Rf, ²⁴⁹No(α)[²⁵³Rf from ²⁰⁴Pb(⁵⁰Ti, n), E=234.3 MeV]; measured evaporation residues (ERs), (ER)(fission)- and (ER)α-correlated events, Eα, Iα, partial half-lives of two fission activities of ²⁵³Rf, α-decay half-life of newly discovered ²⁴⁹No isotope from the α decay mode of ²⁵³Rf in (ER)-α-α-α correlated events using gas-filled TransActinide Separator and Chemistry Apparatus (TASCA) at UNILAC, GSI. ²⁵³Rf; deduced another high-lying ≈0.6-μs isomer. ^251mNo; discussed in Supplemental Material of the paper a possible identification method for direct fission from an isomeric state in ²⁵¹No. Presence of two fission activities in ²⁵³Rf proposed as benchmark cases for the theoretical description of the influence of single-particle orbitals on the fission process.

doi: 10.1103/PhysRevC.104.L031303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8039. Data from this article have been entered in the XUNDL database. For more information, click here.

2021SA01      Phys.Rev.Lett. 126, 032503 (2021)

A.Samark-Roth, D.M.Cox, D.Rudolph, L.G.Sarmiento, B.G.Carlsson, J.L.Egido, P.Golubev, J.Heery, A.Yakushev, S.Aberg, H.M.Albers, M.Albertsson, M.Block, H.Brand, T.Calverley, R.Cantemir, R.M.Clark, C.E.Dullmann, J.Eberth, C.Fahlander, U.Forsberg, J.M.Gates, F.Giacoppo, M.Gotz, S.Gotz, R.-D.Herzberg, Y.Hrabar, E.Jager, D.Judson, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, L.Lens, J.Ljungberg, B.Lommel, J.Louko, C.-C.Meyer, A.Mistry, C.Mokry, P.Papadakis, E.Parr, J.L.Pore, I.Ragnarsson, J.Runke, M.Schadel, H.Schaffner, B.Schausten, D.A.Shaughnessy, P.Thorle-Pospiech, N.Trautmann, J.Uusitalo

Spectroscopy along Flerovium Decay Chains: Discovery of ²⁸⁰Ds and an Excited State in ²⁸²Cn

RADIOACTIVITY ^286,288Fl, ²⁸⁴Cn(α), ²⁸²Cn, ²⁸⁰Ds(SF) [from ^242,244Pu(⁴⁸Ca, X)²⁸⁶Fl/²⁸⁸Fl, E=6.021 MeV/nucleon]; measured decay products, Eα, Iα, Eβ, Iβ α-β coin.; deduced Q-values, T_1/2, J, π. Comparison with theoretical calculations. The gas-filled separator TASCA at the GSI.

doi: 10.1103/PhysRevLett.126.032503
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2021VI08      Phys.Rev. C 104, 054602 (2021)

A.C.Visakh, E.Prasad, P.V.Laveen, M.Shareef, A.Shamlath, S.Nath, N.Madhavan, J.Gehlot, Gonika, R.Biswas, A.Parihari, J.Khuyagbaatar, B.Lommel, B.Kindler, A.M.Vinodkumar, B.R.S.Babu, S.Sanila, K.M.Varier, S.Appannababu

Fusion studies in ¹⁶O + ^{142, 150}Nd reactions at energies near the Coulomb barrier

NUCLEAR REACTIONS ¹⁴²Nd(¹⁶O, X), E=60-104 MeV; ¹⁵⁰Nd(¹⁶O, X), E=56-104 MeV from the 15-UD Pelletron accelerator at IUAC-New Delhi; measured reaction products using the Heavy Ion Reaction Analyzer (HIRA), with electromagnetic configuration of Q1Q2-ED1-M-MD-ED2-Q3Q4 and two silicon surface barrier detectors (SSBDs), evaporation residues (ERs) using position sensitive multiwire proportional counter (MWPC), two-dimensional ΔE versus ToF spectra, σ(E) for ERs; deduced fusion σ(E). ¹⁴⁸Nd(¹⁸O, X), ^142,144,148Nd(¹⁶O, X), E-V_B=-10-35 MeV analyzed previous and present experimental measurements for reduced fusion σ(E). Comparison with coupled channels calculations using CCFULL code, and with 1D-BPM predictions using Akyuz-Winther (AW) potential parameters.

doi: 10.1103/PhysRevC.104.054602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6412.

2020BA41      Phys.Rev. C 102, 024603 (2020)

T.Banerjee, D.J.Hinde, D.Y.Jeung, K.Banerjee, M.Dasgupta, A.C.Berriman, L.T.Bezzina, H.M.Albers, Ch.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, E.C.Simpson, C.Sengupta, B.M.A.Swinton-Bland, T.Tanaka, A.Yakushev, K.Eberhardt, C.Mokry, J.Runke, P.Thorle-Pospiech, N.Trautmann

Systematic evidence for quasifission in ⁹Be-, ¹²C-, and ¹⁶O-induced reactions forming ^{258, 260}No

NUCLEAR REACTIONS ²³⁸U(⁹Be, F)²⁴⁷Cm^*, E=45-60 MeV; ²⁴⁴U(⁹Be, F)²⁵³Cf^*, E=45-60 MeV; ²⁴⁸Cm(⁹Be, F)²⁵⁷Fm^*, E=45-60 MeV; ²⁴⁹Cf(⁹Be, F)²⁵⁸No^*, E=45-60 MeV; ²⁴⁸Cm(¹²C, F)²⁶⁰No^*, E=60.80-89.18 MeV; ²⁴⁴Pu(¹⁶O, F)²⁶⁰No^*, E=84.90-116.27 MeV; measured fission fragments, fission fragment mass and angular distributions using the CUBE spectrometer consisting of three multiwire proportional counters (MWPCs) at the Heavy Ion Accelerator Facility (HIAF) of the Australian National University; deduced reconstructed fission source velocity distributions, full momentum transfer (FMT) fission differential σ(θ, E), total and FMT fission σ(E), FMT mass-angle distributions (MADs), FMT fission angular anisotropies; analyzed mass-ratio (MR) spectra. ^{254,256,258,260,262}No; deduced spontaneous fission mass-ratio distributions. Comparison with predictions from the transition state model (TSM) calculations for fusion fission reactions.

doi: 10.1103/PhysRevC.102.024603
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2020KH01      Nucl.Phys. A994, 121662 (2020)

J.Khuyagbaatar, A.K.Mistry, D.Ackermann, L.-L.Andersson, M.Block, H.Brand, Ch.E.Dullmann, J.Even, F.P.Hessberger, J.Hoffmann, A.Hubner, E.Jager, B.Kindler, J.Krier, N.Kurz, B.Lommel, B.Schausten, J.Steiner, A.Yakushev, V.Yakusheva

The identification and confirmation of isomeric states in ²⁵⁴Rf and ²⁵⁵Rf through conversion electron detection

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁰Ti, 2n), (⁵⁰Ti, n)^254,255Rf, E=252.5, 236.0 MeV pulsed beam from the UNILAC-GSI facility; measured evaporation residues (ERs), decay products, conversion electrons, isomers, T_1/2 from (ERs)(fission events)-correlated, and (ERs)(fission events)(electron)-correlated decay curves using the gas-filled separator TASCA with multi-wire proportional counter (MWPC) and double-sided silicon strip detectors(DSSDs). ^254,255Rf; deduced T_1/2 of the ground states and isomers, production σ. Comparison of measured σ with theoretical calculations using statistical fusion-evaporation code HIVAP.

doi: 10.1016/j.nuclphysa.2019.121662
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8007. Data from this article have been entered in the XUNDL database. For more information, click here.

2020KH08      Phys.Rev.Lett. 125, 142504 (2020)

J.Khuyagbaatar, H.M.Albers, M.Block, H.Brand, R.A.Cantemir, A.Di Nitto, C.E.Dullmann, M.Gotz, S.Gotz, F.P.Hessberger, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, L.Lens, A.Mistry, B.Schausten, J.Uusitalo, and A.Yakushev

Search for Electron-Capture Delayed Fission in the New Isotope ²⁴⁴Md

RADIOACTIVITY ^244,245Md(α), (EC) [from ¹⁹⁷Au(⁵⁰Ti, X), E=239.8, 231.5 MeV]; measured decay products, Eα, Iα; deduced α-particles energies, T_1/2. Comparison with available data.

doi: 10.1103/PhysRevLett.125.142504
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2020KH10      Phys.Rev. C 102, 044312 (2020)

J.Khuyagbaatar, F.P.Hessberger, S.Hofmann, D.Ackermann, H.G.Burkhard, S.Heinz, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, J.Maurer, K.Nishio

α decay of ²⁴³Fm₁₄₃ and ²⁴⁵Fm₁₄₅, and of their daughter nuclei

RADIOACTIVITY ²⁴⁵Fm(α)[from ²⁰⁸Pb(⁴⁰Ar, 3n), E=192 MeV]; ²⁴³Fm(α)[from ²⁰⁶Pb(⁴⁰Ar, 3n), E=185-204 MeV]; ²⁴¹Cf(α)[from ²⁴⁵Fm α]; ²³⁹Cf(α)[from ²⁴³Fm α]; ²³⁵Cm(α)[from ²⁴¹Cf α]; measured evaporation residues (ER), Eα, Iα, (ER)α-α-correlations for ²⁴³Fm decay chain, Eγ from ²⁴¹Cf decay, half-lives of the decays of ²⁴³Fm, ²³⁹Cf and ²³⁵Cm, the ²⁴⁵Fm and ²⁴³Fm activities separated using the SHIP separator at the GSI facility, and implanted into a position sensitive 16-strip Si detector, with six additional silicon detectors as the stop detector. ²⁴⁵Fm(α), (EC), (SF); deduced branching ratios, with upper limits for ϵ and SF modes, HF for α. ²⁴³Fm(α), (EC), (SF); deduced branching ratios, with upper limit for ϵ mode, HF for α. ^239,241Cf, ²³⁵Cm(α), (EC); deduced branching ratios, HF for α. ^239,241Cf, ²³⁷Cm; deduced one tentative level each, J, π, total internal conversion coefficient and multipolarity of a γ ray in ²³⁷Cm, Nilsson configurations. ^243,245Es, ²⁴⁶Fm(α); measured Eα.

doi: 10.1103/PhysRevC.102.044312
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2020KH11      Phys.Rev. C 102, 064602 (2020)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.K.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.B.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Search for elements 119 and 120

NUCLEAR REACTIONS ²⁴⁹Bk, ²⁴⁹Cf(⁵⁰Ti, X)²⁹⁹119^*/²⁹⁹120^*, E(average)=281.5 MeV; measured evaporation residues (ERs), Eα, correlated ER-α and ER-α₁-α₂-SF events using UNILAC accelerator, TASCA separator, and Focal plane detector system (FPDS) consisting of double-sided silicon strip (DSSD) detectors, and Si-strip detectors for position and time correlations of events. ^295,296119, ^295,296120; deduced no evidence for non-random correlated events related to 3n- or 4n-channel deexcitations of the compound nuclei ²⁹⁹119 and ²⁹⁹120, within a sensitivity limit of one event corresponding to σ=65 fb for ²⁴⁹Bk+⁵⁰Ti reaction and σ=200 fb for ²⁴⁹Cf+⁵⁰Ti; discussed nonobservation of Z=119 and 120 superheavy elements within the context of the fusion-evaporation reaction mechanism.

doi: 10.1103/PhysRevC.102.064602
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2020MO10      Acta Phys.Pol. B51, 849 (2020)

P.Mosat, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

Isomeric States in ²⁵⁵Rf, ²⁵⁶Rf and ²⁵⁷Rf

doi: 10.5506/APhysPolB.51.849
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2020MO11      Phys.Rev. C 101, 034310 (2020)

P.Mosat, F.P.Hessberger, S.Antalic, D.Ackermann, B.Andel, M.Block, S.Hofmann, Z.Kalaninova, B.Kindler, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

K isomerism in ²⁵⁵Rf and total kinetic energy measurements for spontaneous fission of ^{255, 256, 258}Rf

RADIOACTIVITY ^255,256RF(SF)[from ^207,208Pb(⁵⁰Ti, 2n), E=228.8, 238.3, 239.8 MeV]; ²⁵⁸Db(EC)[from ²⁰⁹Bi(⁵⁰Ti, n), E=232.6 MeV]; ²⁵⁸Rf(SF)[from ²⁵⁸Db(EC)]; measured evaporation residues (ERs) using the velocity filter SHIP at GSI, spontaneous fission events using time and position correlations, (fragment)(fragment)-coin, total kinetic energy (TKE) distributions of SF fragments, half-lives of ^255,256Rf decays from ER-SF correlated events, half-life of ²⁵⁸Rf decay from ce-SF correlated events, Eγ, Iγ, x rays, ce, γ(ce)-coin, K-isomers and their half-lives in ²⁵⁵Rf from ER-ce-SF/α and ER-ce-(ce)-SF/α correlated events using the STOP and BOX silicon strip detectors, and Ge clover detector at GSI; deduced tentative bimodal fission mode. ²⁵⁵Rf; deduced levels, J, π, two new high-K isomers and their Nilsson configurations; proposed level schemes of the isomers.

doi: 10.1103/PhysRevC.101.034310
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2020NO09      Phys.Rev. C 102, 044605 (2020)

K.V.Novikov, E.M.Kozulin, G.N.Knyazheva, I.M.Itkis, M.G.Itkis, A.A.Bogachev, I.N.Diatlov, M.Cheralu, D.Kumar, N.I.Kozulina, A.N.Pan, I.V.Pchelintsev, I.V.Vorobiev, W.H.Trzaska, S.Heinz, H.M.Devaraja, B.Lommel, E.Vardaci, S.Spinosa, A.Di Nitto, A.Pulcini, S.V.Khlebnikov, P.P.Singh, Ru.N.Sahoo, B.Gall, Z.Asfari, C.Borcea, I.Harca, D.M.Filipescu

Investigation of fusion probabilities in the reactions with ^{52, 54}Cr, ⁶⁴Ni, and ⁶⁸Zn ions leading to the formation of Z = 120 superheavy composite systems

NUCLEAR REACTIONS ²⁴⁸Cm(⁵²Cr, X)³⁰⁰120^*, E=290, 304-MeV; ²⁴⁸Cm(⁵⁴Cr, X)³⁰²120^*, E=296 MeV; ²³²Th(⁶⁸Zn, X)³⁰⁰120^*, E=335 MeV; measured binary reaction products in coincidence by the double-arm time-of-flight spectrometer CORSET, the first two reactions using ²⁴⁸Cm target at the U-400 cyclotron facility of FLNR-Dubna, and the experiment with ²³²Th target at the University of Jyvaskyla K-130 cyclotron facility; deduced yield and TKE matrices of binary fragments as functions of mass and energy, capture cross sections as a function of effective fissility parameter, excitation energy of primary fragments as function of fragment mass, contributions of symmetric fragments to the capture cross sections, fusion probability as function of the mean fissility parameter, and production σ for the formation of Z=120 superheavy nucleus (SHN). ²³⁸U(⁶⁴Ni, X)³⁰²120^*, E=335 MeV; compared results of this experiment, reported in 2010Ko16, at Jyvaskyla with the data in the present experiments. ²⁴⁸Cm(⁵⁴Cr, X) reaction determined to be the most favorable for the production of Z=120 element.

doi: 10.1103/PhysRevC.102.044605
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2019BA26      Phys.Rev.Lett. 122, 232503 (2019)

K.Banerjee, D.J.Hinde, M.Dasgupta, E.C.Simpson, D.Y.Jeung, C.Simenel, B.M.A.Swinton-Bland, E.Williams, I.P.Carter, K.J.Cook, H.M.David, C.E.Dullmann, J.Khuyagbaatar, B.Kindler, B.Lommel, E.Prasad, C.Sengupta, J.F.Smith, K.Vo-Phuoc, J.Walshe, A.Yakushev

Mechanisms Suppressing Superheavy Element Yields in Cold Fusion Reactions

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁰Ti, X), (⁴⁸Ca, X), (⁵⁴Cr, X), E not given; analyzed available data; deduced projectile impact on drastic fall in the symmetric fission yield, which is reflected in the measured mass-angle distribution by the presence of competing fast nonequilibrium deep inelastic and quasifission processes.

doi: 10.1103/PhysRevLett.122.232503
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2019DE11      Eur.Phys.J. A 55, 25 (2019)

H.M.Devaraja, S.Heinz, O.Beliuskina, S.Hofmann, C.Hornung, G.Munzenberg, D.Ackermann, M.Gupta, Y.K.Gambhir, R.A.Henderson, F.P.Hessberger, A.V.Yeremin, B.Kindler, B.Lommel, J.Maurer, K.J.Moody, K.Nishio, A.G.Popeko, M.A.Stoyer, D.A.Shaughnessy

Population of nuclides with A ≥ 98 in multi-nucleon transfer reactions of ⁴⁸Ca + ²⁴⁸Cm

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, x), E=265.4, 270.2 MeV; measured production σ for directly populated nuclei ^252,254Cf, ^254m,256mEs and ²⁶⁰No[the last reaction used was ¹⁸O+²⁵⁴Es at 99 MeV] and for ^254,256Fm from parent decay using SHIP selector to select the fusion products and (in another run) target-like transfer reaction products, Compared with published data.

RADIOACTIVITY ^252,254,256Cf, ²⁵⁶Fm, ^{256,257,259,260}Md, ²⁵⁹No, ^262,263Lr(SF), (α); calculated T_1/2, SF branching ratio.

doi: 10.1140/epja/i2019-12696-3
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2019GU06      Nucl.Instrum.Methods Phys.Res. A925, 87 (2019)

C.Guerrero, J.Lerendegui-Marco, K.Eberhardt, Ch.E.Dullmann, A.Junghans, B.Lommel, C.Mokry, J.M.Quesada, J.Runke, P.Thorle-Pospiech, for the n_TOF Collaboration

On the use of stacks of fission-like targets for neutron capture experiments

doi: 10.1016/j.nima.2019.01.063
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2019KH04      Phys.Rev. C 99, 054306 (2019)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

Fusion reaction ⁴⁸Ca + ²⁴⁹Bk leading to formation of the element Ts (Z=117)

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, 3n), (⁴⁸Ca, 4n)²⁹³Ts/²⁹⁴Ts, E=252.1, 254.0, 258.0 MeV; measured reaction products, evaporation residues (ER), Eα, Iα, (ER)α-correlated decay chains, and σ using double-sided silicon strip detectors for α detection, TASCA separator for evaporation residue, and multiwire proportional counter for detection of residues at UNILAC accelerator facility of GSI. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility.

RADIOACTIVITY ²⁹⁴Ts, ²⁹⁰Mc, ²⁸⁶Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh, ²⁷⁰Db(α); ²⁹³Ts, ²⁸⁹Mc, ²⁸⁵Nh, ²⁸¹Rg(α); ²⁶⁶Lr, ²⁷⁰Db, ²⁷⁷Mt, ²⁷⁷Hs(SF); measured Eα, Iα, SF events, half-lives. ²⁶⁶Lr, ²⁷⁰Db(α), (SF); measured half-lives and α/SF branching ratios. Comparison with previous experimental data for (ER)α-correlated decay chains from DGFRS-Dubna facility. A=200-240; A=240-260; systematics of α-decay half-lives of isotopes produced in ⁴⁸Ca+²⁴⁹Bk and ⁴⁸Ca+²⁴⁹Cf reactions.

doi: 10.1103/PhysRevC.99.054306
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2019XI06      Phys.Rev. C 100, 034315 (2019)

Y.Xiao, S.Go, R.Grzywacz, R.Orlandi, A.N.Andreyev, M.Asai, M.A.Bentley, G.de Angelis, C.J.Gross, P.Hausladen, K.Hirose, S.Hofmann, H.Ikezoe, D.G.Jenkins, B.Kindler, R.Leguillon, B.Lommel, H.Makii, C.Mazzocchi, K.Nishio, P.Parkhurst, S.V.Paulauskas, C.M.Petrache, K.P.Rykaczewski, T.K.Sato, J.Smallcombe, A.Toyoshima, K.Tsukada, K.Vaigneur, R.Wadsworth

Search for α decay of ¹⁰⁴Te with a novel recoil-decay scintillation detector

RADIOACTIVITY ^108,109Xe, ^104,105Te(α)[from ⁵⁴Fe(⁵⁸Ni, X), E=250 MeV from the tandem accelerator of the Japan Atomic Energy Agency (JAEA), followed by separation of evaporation residues using Recoil Mass Separator (RMS)]; measured Eα, Iα, αα-correlations using an inorganic scintillator YAP:Ce for implanted nuclei, and a multiwire proportional chamber (MWPC) for α particles; deduced αα-correlations for the ¹⁰⁹Xe to ¹⁰⁵Te to ¹⁰¹Sn α-decay chain, and no conclusive trace observed for the ¹⁰⁸Xe to ¹⁰⁴Te to ¹⁰⁰Sn α-decay chain, half-life of ¹⁰⁸Xe decay, upper limit of 4 ns for the half-life of ¹⁰⁴Te; estimated cross section for the production of ¹⁰⁸Xe, an order of magnitude lower than the expectation based on earlier cross section measurements and the HIVAP fusion-evaporation code. ¹⁰⁹I(p), ^108,109Te(α); measured proton and α spectra, half-life of ¹⁰⁹I decay. Comparison with data for ¹⁰⁸Xe to ¹⁰⁴Te to ¹⁰⁰Sn α-decay chain reported by 2018Au04.

doi: 10.1103/PhysRevC.100.034315
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2018DI11      Phys.Lett. B 784, 199 (2018)

A.Di Nitto, J.Khuyagbaatar, D.Ackermann, L.-L.Andersson, E.Badura, M.Block, H.Brand, I.Conrad, D.M.Cox, Ch.E.Dullmann, J.Dvorak, K.Eberhardt, P.A.Ellison, N.E.Esker, J.Even, C.Fahlander, U.Forsberg, J.M.Gates, P.Golubev, O.Gothe, K.E.Gregorich, W.Hartmann, R.D.Herzberg, F.P.Hessberger, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, S.Klein, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, S.Lahiri, B.Lommel, M.Maiti, R.Mandl, E.Merchan, S.Minami, A.K.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, D.Renisch, D.Rudolph, J.Runke, L.G.Sarmiento, M.Schadel, H.Schaffner, B.Schausten, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, N.Trautmann, A.Turler, J.Uusitalo, D.Ward, M.Wegrzecki, P.Wieczorek, N.Wiehl, A.Yakushev, V.Yakusheva

Study of non-fusion products in the ₅₀Ti + ₂₄₉Cf reaction

NUCLEAR REACTIONS ²⁴⁹Cf(⁵⁰Ti, X)²¹¹Po/²¹²At/²¹³Rn/²¹⁴Fr/²¹⁵Ra/²²²Ra/²²¹Ra/²²³Ac/²¹⁸Rn/²²⁴Th/²¹⁹Fr/²²³Th/²¹⁸Rn/²¹⁹Fr/²²⁰Ra/²¹⁴Po/²¹⁹Ra/²¹⁷Rn/²¹⁵At, E=306 MeV; measured reaction products, Eα, Iα; deduced σ.

doi: 10.1016/j.physletb.2018.07.058
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2018KH05      Phys.Rev. C 97, 064618 (2018)

J.Khuyagbaatar, H.M.David, D.J.Hinde, I.P.Carter, K.J.Cook, M.Dasgupta, Ch.E.Dullmann, D.Y.Jeung, B.Kindler, B.Lommel, D.H.Luong, E.Prasad, D.C.Rafferty, C.Sengupta, C.Simenel, E.C.Simpson, J.F.Smith, K.Vo-Phuoc, J.Walshe, A.Wakhle, E.Williams, A.Yakushev

Nuclear structure dependence of fusion hindrance in heavy element synthesis

NUCLEAR REACTIONS ^204,208Pb(⁴⁸Ti, X), E=240.0, 245.0, 252.2, 259.0, 270.0, 280.0 MeV; ^206,208Pb(⁵⁰Ti, X), E=236.0, 240.0, 252.0, 258.0, 264.0, 270.0, 280.2 MeV; measured reaction products, mass ratio and angular distributions (MAD) of fragments, double differential σ(θ, M_R), and widths using CUBE detector array at the Heavy Ion Accelerator Facility of Australian National University. ²⁰⁶Pb(³⁶S, X), (³⁴S, X), (⁴⁸Ti, X), (⁵⁰Ti, X), E^*=25-60 MeV; calculated mean-squared angular momenta, widths and M_R distributions, and compared with experimental data. Discussed impact of nuclear structure on fusion-evaporation reactions.

doi: 10.1103/PhysRevC.97.064618
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2018MO20      Acta Phys.Pol. B49, 605 (2018)

P.Mosat, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.Block, S.Hofmann, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, B.Lommel, A.K.Mistry, K.Nishio, J.Piot, B.Sulignano, M.Vostinar

Total Kinetic Energy Measurements for Spontaneous Fission of ^{255, 256, 258}Rf

RADIOACTIVITY ^255,256,258Rf(SF) [Rf isotopes produced in fusion-evaporation reactions]; measured fission fragments kinetic energy vs fragment implantation depth using STIP BOX coincidences and anticoincidences; deduced TKE.

doi: 10.5506/aphyspolb.49.605
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23443.

2018SA45      Phys.Rev. C 98, 044307 (2018)

A.Saamark-Roth, L.G.Sarmiento, D.Rudolph, J.Ljungberg, B.G.Carlsson, C.Fahlander, U.Forsberg, P.Golubev, I.Ragnarsson, D.Ackermann, L.-L.Andersson, M.Block, H.Brand, D.M.Cox, A.Di Nitto, Ch.E.Dullmann, K.Eberhardt, J.Even, J.M.Gates, J.Gerl, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, E.Jager, J.Khuyagbaatar, B.Kindler, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, A.Mistry, C.Mokry, J.P.Omtvedt, P.Papadakis, J.Runke, K.Rykaczewski, M.Schadel, H.Schaffner, B.Schausten, P.Thorle-Pospiech, N.Trautmann, T.Torres, A.Turler, A.Ward, N.Wiehl, A.Yakushev

Low-lying states in ²¹⁹Ra and ²¹⁵Rn: Sampling microsecond α-decaying nuclei

RADIOACTIVITY ²¹⁹Ra(α)[from ²⁴³Am(⁴⁸Ca, X), E=242.1, 245.0 MeV]; measured Eα, Iα, Eγ, Iγ, αγ-coin, α(x ray)-coin, α-α correlations using TASISpec at the TASCA, GSI facility. Pileup analysis and GEANT4 simulation of ²¹⁹Ra to ²¹⁵Rn decay. ^{219,219m,220,221}Ra, ^215,216,217Rn, ^212,213Po, ²¹⁹Fr, ²¹⁵At(α); measured half-lives, Qα. ²¹⁹Ra, ²¹⁵Rn; deduced levels, J, π, isomer in ²¹⁹Ra Comparison with shell model calculations and theoretical calculations of deformation, rotational states and α-decay rates, and with evaluated data in the ENSDF database.

doi: 10.1103/PhysRevC.98.044307
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2017GO06      Nucl.Phys. A961, 1 (2017)

M.Gotz, S.Gotz, J.V.Kratz, Ch.E.Dullmann, Ch.Mokry, J.Runke, P.Thorle-Pospiech, N.Wiehl, M.Schadel, J.Ballof, H.Dorrer, J.Grund, D.Huber, E.Jager, O.Keller, J.Krier, J.Khuyagbaatar, L.Lens, B.Lommel, M.Mendel, K.J.Moody, P.Scharrer, B.Schausten, D.Shaughnessy, M.Schmitt, J.Steiner, N.Trautmann, A.Yakushev, V.Yakusheva

Radiochemical study of the kinematics of multi-nucleon transfer reactions in ⁴⁸Ca + ²⁴⁸Cm collisions 10 percent above the Coulomb barrier

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, x), E=262 MeV; measured multinucleon transfer reaction products, Eα, Iα (for identification of the fragments); deduced TKE vs θ, E^* vs θ for target-like (trans-target ones, like Fm, Es, Cf, Bk and others) fragments using radiochemical methods.

doi: 10.1016/j.nuclphysa.2017.02.006
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2017KO02      Phys.Lett. B 764, 265 (2017)

J.Konki, J.Khuyagbaatar, J.Uusitalo, P.T.Greenlees, K.Auranen, H.Badran, M.Block, R.Briselet, D.M.Cox, M.Dasgupta, A.Di Nitto, Ch.E.Dullmann, T.Grahn, K.Hauschild, A.Herzan, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, R.Julin, S.Juutinen, E.Jager, B.Kindler, J.Krier, M.Leino, B.Lommel, A.Lopez-Martens, D.H.Luong, M.Mallaburn, K.Nishio, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, K.Rezynkina, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, B.Sulignano, Ch.Theisen, A.Ward, A.Yakushev, V.Yakusheva

Towards saturation of the electron-capture delayed fission probability: The new isotopes ²⁴⁰Es and ²³⁶Bk

RADIOACTIVITY ²⁴⁰Es(EC), (α), ²³⁶Bk(EC) [from ²⁰⁹Bi(³⁴S, 3n)²⁴⁰Es, E=174, 178 MeV]; measured decay products, Eα, Iα; deduced T_1/2, branching ratios, electron-capture delayed fission (ECDF) probability. Comparison with available data.

doi: 10.1016/j.physletb.2016.11.038
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2016AN10      Phys.Rev. C 93, 064316 (2016)

B.Andel, A.N.Andreyev, S.Antalic, F.P.Hessberger, D.Ackermann, S.Hofmann, M.Huyse, Z.Kalaninova, B.Kindler, I.Kojouharov, P.Kuusiniemi, B.Lommel, K.Nishio, R.D.Page, B.Sulignano, P.Van Duppen

Short-lived isomers in ¹⁹²Po and ¹⁹⁴Po

NUCLEAR REACTIONS ¹⁴¹Pr(⁵⁶Fe, 2np), E=259 MeV; ¹⁴⁴Sm(⁵¹V, 2np), E=235 MeV; measured reaction products, Eγ, Iγ, γγ-coin, cross sections, half-lives of isomers by (ER)γα and (ER)γγα correlations using SHIP focal plane detectors at GSI. ^192,194Po; deduced levels, J, π, energies of isomeric state, multipolarity, B(E1) and B(E3) values for ¹⁹²Po. Discussed systematics of 11- isomers, B(E1) and B(E3) values in even-A Po and Pb isotopes.

doi: 10.1103/PhysRevC.93.064316
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2016FO10      Nucl.Phys. A953, 117 (2016)

U.Forsberg, D.Rudolph, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, C.Fahlander, J.M.Gates, P.Golubev, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, L.G.Sarmiento, M.Schadel, A.Yakushev, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, J.Dobaczewski, K.Eberhardt, J.Even, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, W.Nazarewicz, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, Y.Shi, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Recoil-α-fission and recoil-α-α- fission events observed in the reaction ⁴⁸Ca + ²⁴³Am

NUCLEAR REACTIONS ²⁴³Am(⁴⁸Ca, x), E=242.1, 245.0 MeV; measured reaction products, fission products, Eα, Iα(t), αα-coin, (recoil)α-coin, En, In using He-gas filled TASCA, TASISpec based on DSSSDs, other DSSSDs; deduced correlation times, α energy spectra, 23 α-decay chains of five α's and α+3n, fragments T_1/2. Discussed existence of long decay chains; compared with published results.

RADIOACTIVITY ^289,288Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); measured decay products, Eα, Iα; deduced T_1/2. Comparison with available data.

doi: 10.1016/j.nuclphysa.2016.04.025
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2016HE08      Eur.Phys.J. A 52, 192 (2016)

F.P.Hessberger, S.Antalic, A.K.Mistry, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, M.Laatiaoui, B.Lommel, J.Piot, M.Vostinar

Alpha- and EC-decay measurements of ²⁵⁷Rf

RADIOACTIVITY ²⁵⁷Rf(α), (EC); measured Eα, Iα, Eγ, Iγ, γα-coin, γα delayed coin, γα correlations, conversion electrons, X-rays using Ge clover detector for γ, ADC, TAC. ²⁵⁷Rf deduced enhanced α-decay scheme, new transition from 70 keV level to 724 level in ²⁵³No, possible EC-decay scheme. ²⁵³No deduced levels, new E1 γ transition from 724 keV to 167 keV level. ²⁵⁷Lr deduced T_1/2. Experimental levels in ²⁴⁵Pu, ²⁴⁷Cm, ²⁴⁹Cf, ²⁵¹Fm, ²⁵³No, ²⁵⁵Rf compared with published calculations for the same nuclei (plus ²⁵⁷Sg).

doi: 10.1140/epja/i2016-16192-0
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2016HE13      Eur.Phys.J. A 52, 278 (2016)

S.Heinz, H.M.Devaraja, O.Beliuskina, V.Comas, S.Hofmann, C.Hornung, G.Munzenberg, D.Ackermann, M.Gupta, R.A.Henderson, F.P.Hessberger, B.Kindler, B.Lommel, R.Mann, J.Maurer, K.J.Moody, K.Nishio, A.G.Popeko, D.A.Shaughnessy, M.A.Stoyer, A.V.Yeremin

Synthesis of new transuranium isotopes in multinucleon transfer reactions using a velocity filter

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, x), E=5.3 MeV/nucleon; measured Eα, Iα, ²²⁵Pa velocity spectrum; deduced, identified 90 known isotopes and 5 new ones (3 produced directly in the reaction, 2 via precursor decays), their production σ.

doi: 10.1140/epja/i2016-16278-7
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2016HE15      Eur.Phys.J. A 52, 328 (2016)

F.P.Hessberger, S.Antalic, D.Ackermann, B.Andel, M.Block, Z.Kalaninova, B.Kindler, I.Kojouharov, M.Laatiaoui, B.Lommel, A.K.Mistry, J.Piot, M.Vostinar

Investigation of electron capture decay of ²⁵⁸Db and α decay of ²⁵⁸Rf

RADIOACTIVITY ²⁵⁸Db(EC), ²⁵⁸Rf(α), (SF); measured ²⁵⁸Db K-shell X-rays, Eγ, Iγ(t), CE, (X-ray)(CE)-coin; measured ²⁵⁸Rf spontaneous fission, Eα, Iα; measured delayed coin between ²⁵⁸Db and ²⁵⁸Rf decays; deduced isomeric states, T_1/2; deduced ²⁵⁸Rf α branch decay, α branching ratio, mass excess using ²⁵⁴No mass excess. Halflives compared with those measured by different types of correlation, mass excess compared with systematics for e-e nuclei.

doi: 10.1140/epja/i2016-16328-2
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Data from this article have been entered in the XUNDL database. For more information, click here.

2016HO06      Eur.Phys.J. A 52, 116 (2016)

S.Hofmann, S.Heinz, R.Mann, J.Maurer, G.Munzenberg, S.Antalic, W.Barth, L.Dahl, K.Eberhardt, R.Grzywacz, J.H.Hamilton, R.A.Henderson, J.M.Kenneally, B.Kindler, I.Kojouharov, R.Lang, B.Lommel, K.Miernik, D.Miller, K.J.Moody, K.Morita, K.Nishio, A.G.Popeko, J.B.Roberto, J.Runke, K.P.Rykaczewski, C.Scheidenberger, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, A.V.Yeremin

Remarks on the fission barriers of super-heavy nuclei

RADIOACTIVITY ²⁸⁵Fl, ^291,292,293Lv, ²⁹⁴Og(α); calculated mass excess, Q_α, shell correction energies for complete α-decay chains. Z=118, 120(α); deduced estimates for synthesis σ. Compared with calculations using macroscopic-microscopic models.

doi: 10.1140/epja/i2016-16116-0
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2016HO09      Eur.Phys.J. A 52, 180 (2016)

S.Hofmann, S.Heinz, R.Mann, J.Maurer, G.Munzenberg, S.Antalic, W.Barth, H.G.Burkhard, L.Dahl, K.Eberhardt, R.Grzywacz, J.H.Hamilton, R.A.Henderson, J.M.Kenneally, B.Kindler, I.Kojouharov, R.Lang, B.Lommel, K.Miernik, D.Miller, K.J.Moody, K.Morita, K.Nishio, A.G.Popeko, J.B.Roberto, J.Runke, K.P.Rykaczewski, S.Saro, C.Scheidenberger, H.J.Schott, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, A.V.Yeremin

Review of even element super-heavy nuclei and search for element

doi: 10.1140/epja/i2016-16180-4
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2016TR05      Phys.Rev. C 93, 054604 (2016)

A.Trzcinska, E.Piasecki, A.Amar, W.Czarnacki, N.Keeley, M.Kisielinski, S.Kliczewski, M.Kowalczyk, B.Lommel, M.Mutterer, R.Siudak, A.Stolarz, I.Strojek, G.Tiourin, W.H.Trzaska

Examination of the influence of transfer channels on the barrier height distribution: Scattering of ²⁰Ne on ⁵⁸Ni, ⁶⁰Ni, and ⁶¹Ni at near-barrier energies

NUCLEAR REACTIONS ²⁰Ne(⁵⁸Ni, X), (⁶⁰Ni, X), (⁶¹Ni, X), E=51 MeV; measured reaction products based on time-of-flight and ΔE-E methods, angular distributions, transfer probabilities and transfer cross sections for 1p, 1n, 2n, 2p and α pickup and stripping channels. Experiments carried out at Warsaw U200-P cyclotron facility. Comparison with coupled reaction channel calculations.

doi: 10.1103/PhysRevC.93.054604
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2015AN05      Eur.Phys.J. A 51, 41 (2015)

S.Antalic, F.P.Hessberger, D.Ackermann, S.Heinz, S.Hofmann, B.Kindler, J.Khuyagbaatar, B.Lommel, R.Mann

Nuclear isomers in ²⁵⁹Sg and ²⁵⁵Rf

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁴Cr, n), E=257-270 MeV; measured evaporation residues using PSSD strips, Eα, Iα, Eγ, Iγ, αγ-coin using Ge.

RADIOACTIVITY ²⁵⁹Sg(α), (EC), (β⁺); measured Eα, Iα(t), αα correlations, α(ER) correlations, time α-decay curves; deduced branching ratios, T_1/2. ²⁵⁵Rf, ²⁵⁹Sg; deduced isomeric state, T_1/2. ²⁵⁵Rf, ²⁵⁹Sg(SF), (α), (β⁺); measured α decay using PSSD, distribution of correlation times, fission spectra; deduced hindrance factor, single-particle level, J, π systematics, decay scheme for α decay of ²⁵⁹Sg. ²⁵⁵Rf deduced branching ratios.

doi: 10.1140/epja/i2015-15041-0
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2015DE22      Phys.Lett. B 748, 199 (2015)

H.M.Devaraja, S.Heinz, O.Beliuskina, V.Comas, S.Hofmann, C.Hornung, G.Munzenberg, K.Nishio, D.Ackermann, Y.K.Gambhir, M.Gupta, R.A.Henderson, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, K.J.Moody, J.Maurer, R.Mann, A.G.Popeko, D.A.Shaughnessy, M.A.Stoyer, A.V.Yeremin

Observation of new neutron-deficient isotopes with Z≥92 in multinucleon transfer reactions

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, X)²¹⁶U/²¹²Th/²⁰⁸Fr/²¹⁹Np/²²³Am/²¹⁵Pa/²¹¹Ac/²⁰⁷Fr/²²⁹Am/²²⁵Np/²¹³Fr/²³³Bk/²²⁵Np, E=270 MeV; measured reaction fragments, Eα, Iα; deduced five new isotopes σ, T_1/2. Comparison with available data.

doi: 10.1016/j.physletb.2015.07.006
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2015HE30      Eur.Phys.J. A 51, 140 (2015)

S.Heinz, O.Beliuskina, V.Comas, H.M.Devaraja, C.Heinz, S.Hofmann, E.Kozulin, F.Morherr, G.Munzenberg, D.Ackermann, F.P.Hessberger, B.Kindler, B.Lommel, R.Mann, J.Maurer

Nuclear molecule formation and time delay in collisions of nuclei with Z₁ + Z₂ ≥ 110

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, x), E=4.85-5.92 MeV/nucleon;²⁰⁸Pb(¹³²Xe, αx), (¹³²Xe, x), E=6.1 MeV/nucleon; measured reaction fragments using SHIP velocity filter, Eα, Iα. Po, At, Rn, Fr, Ra deduced velocity spectra, σ(θ), TKE, quadrupole deformation, nuclear molecule lifetime. ²³⁸U(²³⁸U, x), E=6.09, 6.29, 6.91, 7.10, 7.35 MeV/nucleon; measured reaction fragments using VAMOS spectrometer; deduced TKE, interaction lifetime vs mass number, σ vs mass number, quadrupole deformation; calculated σ vs mass number, quadrupole deformation.

doi: 10.1140/epja/i2015-15140-x
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2015KA24      Phys.Rev. C 92, 014321 (2015)

Z.Kalaninova, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, B.Kindler, M.Laatiaoui, B.Lommel, J.Maurer

Levels in ²²³Th populated by α decay of ²²⁷U

RADIOACTIVITY ²²⁷U(α)[from ²⁰⁸Pb(²²Ne, 3n), E=104 MeV]; measured reaction products, Eα, Iα, Eγ, Iγ, αγ-coin, αα-correlations at GSI facility. ²²³Th; deduced levels, J, π, α feedings, α hindrance factors, conversion coefficients, multipolarities. Monte Carlo simulation of α spectrum using GEANT4 code.

doi: 10.1103/PhysRevC.92.014321
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2015KH09      Phys.Rev.Lett. 115, 242502 (2015)

J.Khuyagbaatar, A.Yakushev, Ch.E.Dullmann, D.Ackermann, L.L-.Andersson, M.Block, H.Brand, D.M.Cox, J.Even, U.Forsberg, P.Golubev, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, J.Hoffmann, A.Hubner, E.Jager, J.Jeppsson, b.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, M.Maiti, S.Minami, A.K.Mistry, C.M.Mrosek, I.Pysmenetska, D.Rudolph, L.G.Sarmiento, H.Schaffner, M.Schadel, B.Schausten, J.Steiner, T.Torres De Heidenreich, J.Uusitalo, M.Wegrzecki, N.Wiehl, V.Yakusheva

New Short-Lived Isotope ²²¹U and the Mass Surface Near N = 126

RADIOACTIVITY ^221,222U, ²¹⁸Ac(α) [from ¹⁷⁶Yb(⁵⁰Ti, X)²²¹U/²²²U, E=231-255 MeV]; measured decay products, Eα, Iα. ^214,215Ra, ^217,218,219Th, ²¹⁴Fr, ^221,222U; deduced T_1/2, Q-values. A fast data readout technique, comparison with FRDM95 and HFB26 calculations.

doi: 10.1103/PhysRevLett.115.242502
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2015NI09      Phys.Lett. B 748, 89 (2015)

K.Nishio, A.N.Andreyev, R.Chapman, X.Derkx, Ch.E.Dullmann, L.Ghys, F.P.Hessberger, K.Hirose, H.Ikezoe, J.Khuyagbaatar, B.Kindler, B.Lommel, H.Makii, I.Nishinaka, T.Ohtsuki, S.D.Pain, R.Sagaidak, I.Tsekhanovich, M.Venhart, Y.Wakabayashi, S.Yan

Excitation energy dependence of fragment-mass distributions from fission of ^{180, 190}Hg formed in fusion reactions of ³⁶Ar + ^{144, 154}Sm

NUCLEAR REACTIONS ^144,154Sm(³⁶Ar, X)¹⁸⁰Hg/¹⁹⁰Hg, E=148-198 MeV; measured reaction products; deduced fission fragment mass and total kinetic-energy distributions. Comparison with available data.

doi: 10.1016/j.physletb.2015.06.068
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2015PR07      Phys.Rev. C 91, 064605 (2015)

E.Prasad, D.J.Hinde, K.Ramachandran, E.Williams, M.Dasgupta, I.P.Carter, K.J.Cook, D.Y.Jeung, D.H.Luong, S.McNeil, C.S.Palshetkar, D.C.Rafferty, C.Simenel, A.Wakhle, J.Khuyagbaatar, Ch.E.Dullmann, B.Lommel, B.Kindler

Observation of mass-asymmetric fission of mercury nuclei in heavy ion fusion

NUCLEAR REACTIONS ¹⁴²Nd(⁴⁰Ca, X)¹⁸²Hg*, E=167.7, 194.9, 199.9, 210.0, 221.1 MeV; ¹⁸²W(¹³C, X)¹⁹⁵Hg*, E=60.0, 63.0, 66.0 MeV; measured fission fragments mass rations and mass-angle distributions using the CUBE spectrometer at 14UD Pelletron facility of ANU-Canberra; deduced mass-asymmetric fission of ¹⁸²Hg compound nucleus at E*=33.6 MeV, and mass-symmetric fission of ¹⁹⁵Hg compound nucleus at all energies.Kinematic reconstruction method. Comparison with results from mass-asymmetric fission of ¹⁸⁰Hg in beta-delayed fission process, and with theoretical predictions.

doi: 10.1103/PhysRevC.91.064605
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2015RU11      J.Radioanal.Nucl.Chem. 303, 1185 (2015)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Selected spectroscopic results on element 115 decay chains

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α), ²⁶⁸Db(SF); measured decay products, Eα, Iα; deduced Q-values, level energies, branching ratios. Comparison with GEANT4 Monte-Carlo simulations.

doi: 10.1007/s10967-014-3445-y
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2015TR06      Phys.Rev. C 92, 034619 (2015)

A.Trzcinska, E.Piasecki, K.Hagino, W.Czarnacki, P.Decowski, N.Keeley, M.Kisielinski, P.Koczon, A.Kordyasz, E.Koshchiy, M.Kowalczyk, B.Lommel, A.Stolarz, I.Strojek, K.Zerva

Quasielastic barrier distributions for the ²⁰Ne + ^{58, 60, 61}Ni systems: Influence of weak channels

NUCLEAR REACTIONS ^58,60,62Ni(²⁰Ne, ²⁰Ne'), E=43-62 MeV; measured excitation function for back-scattered ions, σ(E) at Heavy Ion Laboratory, University of Warsaw; deduced barrier height distributions. Comparisons with predictions by coupled-channel (CC) calculations.

doi: 10.1103/PhysRevC.92.034619
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2014AN10      Phys.Rev. C 90, 044312 (2014)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, J.Elseviers, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann, R.D.Page, P.Van Duppen, M.Venhart

α decay of ¹⁷⁶Au

RADIOACTIVITY ¹⁷⁶Au(α)[from ¹⁴¹Pr(⁴⁰Ca, 5n), E=208, 212 MeV using UNILAC and SHIP at GSI]; ¹⁷²Ir(α)[from ¹⁷⁶Au α parent]; measured Eα, Iα, Eγ, Iγ, αγ-, αα-coin; deduced branching ratios, hindrance factors, reduced α-decay widths, Q-values, GEANT simulations, new α decay branch for decay of high spin isomer of ¹⁷²Ir. ¹⁷²Ir, ¹⁶⁸Re; deduced levels, isomers, J, π, multipolarity, configuration. ¹⁸⁰Tl(α); discussed α decay results of experiment at ISOLDE-CERN facility. ¹⁶⁸Re, ¹⁷²Ir, ¹⁷⁶Au; discussed general systematics of multiplet states, and calculated Nilsson orbitals for neutrons and protons for ¹⁷²Ir and ¹⁷⁶Au. Comparison with previous experimental results. ¹⁷⁵Pt, ¹⁷⁷Au(α); observed α.

doi: 10.1103/PhysRevC.90.044312
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2014BE41      Eur.Phys.J. A 50, 161 (2014)

O.Beliuskina, S.Heinz, V.Zagrebaev, V.Comas, C.Heinz, S.Hofmann, R.Knobel, M.Stahl, D.Ackermann, F.P.Hessberger, B.Kindler, B.Lommel, J.Maurer, R.Mann

On the synthesis of neutron-rich isotopes along the N = 126 shell in multinucleon transfer reactions

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, x), E=4.80-5.92 MeV/nucleon; measured Eα, Iα, Eγ, Iγ from deep-inelastic fragments using SHIP; deduced γ transitions. Os, Ir, Pt, Au, Hg, Tl deduced isotope production σ; calculated isotope production σ using stochastic approach and Langevine-type dynamical equations. Cross sections compared with ²⁰⁸Pb(⁶⁴Ni, x) thick target and fragmentation data.

doi: 10.1140/epja/i2014-14161-3
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2014KA23      Phys.Rev. C 89, 054312 (2014)

Z.Kalaninova, S.Antalic, A.N.Andreyev, F.P.Hessberger, D.Ackermann, B.Andel, L.Bianco, S.Hofmann, M.Huyse, B.Kindler, B.Lommel, R.Mann, R.D.Page, P.J.Sapple, J.Thomson, P.Van Duppen, M.Venhart

Decay of ^201-203Ra and ^200-202Fr

RADIOACTIVITY ^{200,201,201m,202,202m}Fr, ^{201,201m,202,203,203m}Ra(α)[from ^147,149Sm(⁵⁶Fe, X), E=236-275 MeV]; ^198,199,199mRn, ^196,197,197mAt, ^198,198mAt, ¹⁹⁴Po(α)[daughters of Fr and Ra α decay chains]; measured Eα, Iα, γα-coin, Eγ, Iγ, (evaporation residues)α and α₁-α₂, ER-fission correlations, half-lives using SHIP separator at GSI; deduced level energies of some of the isomers, Q(α), α branching ratios for some activities, reduced widths from Rasmussen prescription. ^200,201Fr; deduced new micro-sec isomers from γ-ray and x-ray data, half-lives. ²⁰⁰Fr; deduced evidence for beta-delayed fission from Er-fission correlated events. Comparison with previous experimental data. Systematics of Q(α) and reduced α widths in N=102-140 Po, Rn and Ra isotopes. Systematics of single-particle levels in N=104-126 Fr, At and Bi isotopes.

doi: 10.1103/PhysRevC.89.054312
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2014KH04      Phys.Rev.Lett. 112, 172501 (2014)

J.Khuyagbaatar, A.Yakushev, C.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Asai, M.Block, R.A.Boll, H.Brand, D.M.Cox, M.Dasgupta, X.Derkx, A.Di Nitto, K.Eberhardt, J.Even, M.Evers, C.Fahlander, U.Forsberg, J.M.Gates, N.Gharibyan, P.Golubev, K.E.Gregorich, J.H.Hamilton, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.J.Hinde, J.Hoffmann, R.Hollinger, A.Hubner, E.Jager, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, M.Laatiaoui, S.Lahiri, R.Lang, B.Lommel, M.Maiti, K.Miernik, S.Minami, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, G.K.Pang, P.Papadakis, D.Renisch, J.Roberto, D.Rudolph, J.Runke, K.P.Rykaczewski, L.G.Sarmiento, M.Schadel, B.Schausten, A.Semchenkov, D.A.Shaughnessy, P.Steinegger, J.Steiner, E.E.Tereshatov, P.Thorle-Pospiech, K.Tinschert, T.Torres De Heidenreich, N.Trautmann, A.Turler, J.Uusitalo, D.E.Ward, M.Wegrzecki, N.Wiehl, S.M.Van Cleve, V.Yakusheva

⁴⁸Ca + ²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, X)²⁹⁴Ts, E=268.3, 270.2, 274.1 MeV; measured reaction products, Eα, Iα; deduced σ. Comparison with experimental data.

RADIOACTIVITY ²⁹⁴Ts, ²⁹⁰Mc, ²⁸⁶Nh, ²⁸²Rg, ²⁷⁸Mt, ²⁷⁴Bh, ²⁷⁰Db, ²⁶⁶Lr(α); measured decay products, Eα, Iα; deduced T_1/2. Comparison with experimental data.

doi: 10.1103/PhysRevLett.112.172501
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2014NI16      Nucl.Data Sheets 119, 299 (2014)

K.Nishio, H.Ikezoe, S.Hofmann, D.Ackermann, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, S.Heinz, J.A.Heredia, F.P.Hessberger, K.Hirose, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, M.Makii, R.Mann, S.Mitsuoka, I.Nishinaka, T.Ohtsuki, S.Saro, M.Schadel, A.G.Popeko, A.Turler, Y.Wakabayashi, Y.Watanabe, A.Yakushev, A.Yeremin

Study of Heavy-ion Induced Fission for Heavy Element Synthesis

NUCLEAR REACTIONS ²³⁸U(³⁰Si, F), (³⁴S, F), E^*=30-68 MeV;²³⁸U(³⁶S, F), E(cm)=140-180 MeV; measured reaction products; calculated σ; deduced σ. ²³⁸U(³⁰Si, xn), E(cm)=125-160 MeV;²³⁸U(³⁴S, xn), E(cm)=140-180 MeV; measured reaction products; deduced σ; calculated σ.

doi: 10.1016/j.nds.2014.08.082
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2014RU04      Acta Phys.Pol. B45, 263 (2014)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, R.-D.Herzberg, F.P.Hessberger, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Alpha-Photon Coincidence Spectroscopy Along Element 115 Decay Chains

RADIOACTIVITY ^287,288Mc, ^283,284Nh, ^279,280Rg, ^275,276Mt, ^271,272Bh(α), ^267,268Db(SF) [from ²⁴³Am(⁴⁸Ca, X), E not given]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays; deduced T_1/2, correlated α-decay chains. Comparison with available data.

doi: 10.5506/APhysPolB.45.263
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2014TR03      Acta Phys.Pol. B45, 383 (2014)

A.Trzcinska, E.Piasecki, W.Czarnacki, P.Decowski, N.Keeley, M.Kisielinski, S.Kliczewski, P.Koczon, A.Kordyasz, M.Kowalczyk, S.Khlebnikov, E.Koshchiy, T.Krogulski, B.Lommel, T.Loktev, M.Mutterer, K.Piasecki, I.Strojek, W.H.Trzaska, S.Smirnov, A.Stolarz, G.Tiourin

Barrier Height Distributions - the Influence of Weak Channels

doi: 10.5506/APhysPolB.45.383
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2014YA33      Inorg. Chem. 53, 1624 (2014)

A.Yakushev, J.M.Gates, A.Turler, M.Schadel, C.E.Dullmann, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, K.Eberhardt, H.G.Essel, J.Even, U.Forsberg, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.V.Kratz, J.Krier, N.Kurz, B.Lommel, L.J.Niewisch, H.Nitsche, J.P.Omtvedt, E.Parr, Z.Qin, D.Rudolph, J.Runke, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

Superheavy Element Flerovium (Element 114) Is a Volatile Metal

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, Xn)²⁸⁸Fl/²⁸⁹Fl, E=259.4 MeV; measured reaction products, Eα, Iα; deduced two atoms of flerovium, the observed adsorption behavior of Fl points to a higher inertness compared to its nearest homologue in the group, Pb. However, the measured lower limit for the adsorption enthalpy of Fl on a Au surface points to the formation of a metal-metal bond of Fl with Au. Fl is the least reactive element in the group, but still a metal.

doi: 10.1021/ic4026766
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2013AN03      Phys.Rev. C 87, 014317 (2013)

A.N.Andreyev, S.Antalic, D.Ackermann, L.Bianco, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, Z.Kalaninova, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, K.Nishio, R.D.Page, J.J.Ressler, B.Streicher, S.Saro, B.Sulignano, P.Van Duppen

β-delayed fission of ^{192, 194}At

RADIOACTIVITY ¹⁹²At(β⁺F)[from ¹⁴⁴Sm(⁵¹V, 3n), E=230 MeV]; ¹⁹⁴At(β⁺F)[from ¹⁴¹Pr(⁵⁶Fe, 3n), E=259 MeV]; measured fission fragments, total energy spectrum, (fragment)γ-coin, T_1/2 using recoil-fission correlation technique at SHIP facility in GSI. ^192,194Po; deduced upper limits on TKE, β-delayed fission (βDF) probabilities. Discussed unusually high β-delayed fission probability for ¹⁹²At. ¹⁹⁴At(β⁺F)[from ¹⁴⁴Sm(⁵²Cr, pn), E=236 MeV]; analyzed fission fragment spectra; deduced T_1/2.

NUCLEAR REACTIONS ¹⁴¹Pr(⁵⁶Fe, xn)¹⁹³At/¹⁹⁴At/¹⁹⁵At, E=230-270 MeV; measured α spectra for ^193,194,195At, and delayed fission spectra for ¹⁹⁴At, σ(E).

doi: 10.1103/PhysRevC.87.014317
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2013AN08      Acta Phys.Pol. B44, 387 (2013)

S.Antalic, F.P.Hessberger, D.Ackermann, M.Block, S.Heinz, S.Hofmann, Z.Kalaninova, B.Kindler, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano

Nuclear Structure of Heavy N = 153 Isotones

NUCLEAR REACTIONS ²⁰⁶Pb(⁵⁴Cr, n)²⁵⁹Sg, E=257-270 MeV; measured reaction products; deduced σ.

RADIOACTIVITY ²⁵⁹Sg(α) [from ²⁰⁶Pb(⁵⁴Cr, n)²⁵⁹Sg, E=257-270 MeV]; measured decay products, Eα, Iα; deduced T_1/2 for isomeric states.

doi: 10.5506/APhysPolB.44.387
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2013AN10      Phys.Rev. C 87, 054311 (2013)

A.N.Andreyev, V.Liberati, S.Antalic, D.Ackermann, A.Barzakh, N.Bree, T.E.Cocolios, J.Diriken, J.Elseviers, D.Fedorov, V.N.Fedosseev, D.Fink, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, O.Ivanov, J.Khuyagbaatar, B.Kindler, U.Koster, J.F.W.Lane, B.Lommel, R.Mann, B.Marsh, P.Molkanov, K.Nishio, R.D.Page, N.Patronis, D.Pauwels, D.Radulov, S.Saro, M.Seliverstov, M.Sjodin, I.Tsekhanovich, P.Van den Bergh, P.Van Duppen, M.Venhart, M.Veselsky

α-decay spectroscopy of the chain ¹⁷⁹Tl^g → ¹⁷⁵Au^g → ¹⁷¹Ir^g → ¹⁶⁷Re^m

RADIOACTIVITY ¹⁷⁹Tl(α)[from U(p, F), E=1.4 GeV and ¹⁴⁴Sm(⁴⁰Ca, 4np), E=232 MeV]; ¹⁷⁵Au, ¹⁷¹Ir(α)[from ¹⁷⁹Tl(α) decay]; measured Eα, Iα, Eγ, (recoil)α-, αα-coin, T_1/2, α-branching ratios, yields at ISOLDE-CERN and SHIP-GSI facilities. ¹⁷⁹Tl, ¹⁷⁵Au, ¹⁷¹Ir, ¹⁶⁷Re; deduced levels, J, π. ^172,173,175Pt, ^176,177Hg, ¹⁷⁹Au(α); measured Eα. Comparison with earlier experimental results.

doi: 10.1103/PhysRevC.87.054311
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2013AN13      Phys.Rev.Lett. 110, 242502 (2013)

A.N.Andreyev, M.Huyse, P.Van Duppen, C.Qi, R.J.Liotta, S.Antalic, D.Ackermann, S.Franchoo, F.P.Hessberger, S.Hofmann, I.Kojouharov, B.Kindler, P.Kuusiniemi, S.R.Lesher, B.Lommel, R.Mann, K.Nishio, R.D.Page, B.Streicher, S.Saro, B.Sulignano, D.Wiseman, R.A.Wyss

Signatures of the Z = 82 Shell Closure in α-Decay Process

RADIOACTIVITY ¹⁸⁶Po, ¹⁸²Pb, ¹⁷⁸Hg, ¹⁷⁴Pt(α) [from ¹⁴⁴Sm(⁴⁶Ti, X)¹⁹⁰Po, E=230 MeV, ¹⁹⁰Po(4n)]; measured decay products, Eα, Iα; deduced σ, identification of ¹⁸⁶Po, the α-particle formation probabilities.

doi: 10.1103/PhysRevLett.110.242502
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2013CO18      Eur.Phys.J. A 49, 112 (2013)

V.F.Comas, S.Heinz, S.Hofmann, D.Ackermann, J.A.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

Study of multi-nucleon transfer reactions in ^{58, 64}Ni + ²⁰⁷Pb collisions at the velocity filter SHIP

NUCLEAR REACTIONS ²⁰⁷Pb(⁵⁸Ni, X), (⁶⁴Ni, X), E=4.80-5.92 MeV/nucleon; measured Eα, Iα from fragment α decay, reaction fragments. Po, At, Rn, Fr deduced isotopic yields (primary and secondary), Q value, σ. Compared with Zagrebaev's calculations and data from nearby reactions. ²⁰⁸Pb(⁶⁴Ni, X)²⁷¹Ds, E≈0; measured reaction products; deduced σ.

doi: 10.1140/epja/i2013-13112-x
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2013KA16      Phys.Rev. C 87, 044335 (2013)

Z.Kalaninova, A.N.Andreyev, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.C.Drummond, S.Hofmann, M.Huyse, B.Kindler, J.F.W.Lane, V.Liberati, B.Lommel, R.D.Page, E.Rapisarda, K.Sandhu, S.Saro, A.Thornthwaite, P.Van Duppen

α decay of the very neutron-deficient isotopes ^197-199Fr

NUCLEAR REACTIONS ¹⁴¹Pr(⁶⁰Ni, xn)¹⁹⁷Fr/¹⁹⁸Fr/¹⁹⁹Fr, E=262-300 MeV; measured Eα, Eγ, (ER)α-, αα-correlations, time-of-flight, production σ using SHIP at GSI facility.

RADIOACTIVITY ^197,198,199Fr(α)[from ¹⁴¹Pr(⁶⁰Ni, X), E=262-300 MeV]; measured Eγ, Iγ, Eα, (ER)α-, αα-, αγ-coin, T_1/2 using SHIP at GSI facility. ^193,194,195At, ^189,190,191Bi(α)[from α decay of ^197,198,199Fr parents]; measured Eα, half-lives, αα correlations. ^197,198,199Fr, ^193,194,195At, ^189,190Bi, ¹⁸⁵Tl; deduced levels, J, π, isomers, configurations, reduced α-decay width. ^197,198,199Rn, ¹⁹⁷At, ^{193,194,195,196}Po(α); observed α peaks in spectra. Systematics of α-decay reduced widths for 1/2+ to 1/2+, 7/2- to 7/2-, and 9/2- to 9/2- α transitions in N=105-135, odd-A At, Fe and even-A Rn isotopes.

doi: 10.1103/PhysRevC.87.044335
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2013LA02      Phys.Rev. C 87, 014318 (2013)

J.F.W.Lane, A.N.Andreyev, S.Antalic, D.Ackermann, J.Gerl, F.P.Hessberger, S.Hofmann, M.Huyse, H.Kettunen, A.Kleinbohl, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, G.Munzenberg, K.Nishio, R.D.Page, S.Saro, H.Schaffner, M.J.Taylor, P.Van Duppen

β-delayed fission of ^{186, 188}Bi isotopes

RADIOACTIVITY ¹⁸⁸Bi(β⁺F)[from ¹⁴²Nd(⁵⁰Cr, 3np), E=252 MeV]; ¹⁸⁶Bi(β⁺F)[from ¹⁴⁴Sm(⁴⁶Ti, 3np), E=239 MeV]; measured α, particle and fission fragment spectra, T_1/2 using recoil-fission correlation technique at SHIP facility in GSI. ^186,188Pb; deduced estimates of beta-delayed fission (βDF) probabilities. Comparison with β-delayed fission probabilities for ¹⁹²At, ²⁴⁶Md.

doi: 10.1103/PhysRevC.87.014318
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2013RU11      Phys.Rev.Lett. 111, 112502 (2013)

D.Rudolph, U.Forsberg, P.Golubev, L.G.Sarmiento, A.Yakushev, L.-L.Andersson, A.Di Nitto, Ch.E.Dullmann, J.M.Gates, K.E.Gregorich, C.J.Gross, F.P.Hessberger, R.-D.Herzberg, J.Khuyagbaatar, J.V.Kratz, K.Rykaczewski, M.Schadel, S.Aberg, D.Ackermann, M.Block, H.Brand, B.G.Carlsson, D.Cox, X.Derkx, K.Eberhardt, J.Even, C.Fahlander, J.Gerl, E.Jager, B.Kindler, J.Krier, I.Kojouharov, N.Kurz, B.Lommel, A.Mistry, C.Mokry, H.Nitsche, J.P.Omtvedt, P.Papadakis, I.Ragnarsson, J.Runke, H.Schaffner, B.Schausten, P.Thorle-Pospiech, T.Torres, T.Traut, N.Trautmann, A.Turler, A.Ward, D.E.Ward, N.Wiehl

Spectroscopy of Element 115 Decay Chains

RADIOACTIVITY ²⁸⁸Mc, ²⁸⁴Nh, ²⁸⁰Rg, ²⁷⁶Mt, ²⁷²Bh(α) [from ²⁴³Am(⁴⁸Ca, X), E=5.4 MeV/nucleon]; measured decay products, Eα, Iα, Eγ, Iγ, X-rays. ²⁸⁰Rg, ²⁷⁶Mt; deduced T_1/2, Q-value, α-decay scheme. Comparison with Monte Carlo calculations.

doi: 10.1103/PhysRevLett.111.112502
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2012CO22      Eur.Phys.J. A 48, 180 (2012)

V.Comas, S.Heinz, S.Hofmann, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

Observation of rotating nuclear molecules and determination of their lifetimes

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, X), E=5.92 MeV/nucleon; measured reaction fragments energy and angular distributions using SHIP velocity filter; calculated DNS (double nuclear system) T_1/2 as function of peaks in angular distributions. ^212mAt, ²¹³Rn, ²¹³Fr, ²¹⁵Ra deduced σ(θ) vs cm velocity, TKE, T_1/2 from the peaks of σ(θ).

doi: 10.1140/epja/i2012-12180-8
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2012FO03      Acta Phys.Pol. B43, 305 (2012)

U.Forsberg, P.Golubev, L.G.Sarmiento, J.Jeppsson, D.Rudolph, L.-L.Andersson, D.Ackermann, M.Asai, M.Block, K.Eberhardt, J.Even, Ch.E.Dullmann, J.Dvorak, J.M.Gates, K.E.Gregorich, R.-D.Herzberg, F.P.Hessberger, E.Jager, J.Khuyagbaatar, I.Kojouharov, J.V.Kratz, J.Krier, N.Kurz, S.Lahiri, B.Lommel, M.Maiti, E.Merchan, J.P.Omtvedt, E.Parr, J.Runke, H.Schaffner, M.Schadel, A.Yakushev

First Experiment at TASCA Towards X-Ray Fingerprinting of Element 115 Decay Chains

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, 2n)²⁵⁴No, E=4.59 MeV/nucleon; measured reaction fusion-evaporation products; deduced distribution of evaporation residue. Comparison with theoretical calculations.

doi: 10.5506/APhysPolB.43.305
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2012HE05      Eur.Phys.J. A 48, 32 (2012)

S.Heinz, S.Hofmann, V.Comas, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

The source of "background" fission events in experiments on superheavy elements

NUCLEAR REACTIONS ²³⁸U(⁶⁴Ni, F), (⁶⁴Ni, X), E=5.53 MeV/nucleon;²⁴⁸Cm(⁴⁸Ca, F), (⁴⁸Ca, X), (⁵⁴Cr, F), (⁵⁴Cr, X), E=5.53 MeV/nucleon; measured E(heavy fragment), I(heavy fragment); deduced σ, σ(θ) vs fragment velocity.

doi: 10.1140/epja/i2012-12032-7
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2012HE09      Eur.Phys.J. A 48, 75 (2012)

F.P.Hessberger, S.Antalic, D.Ackermann, Z.Kalaninova, S.Heinz, S.Hofmann, B.Streicher, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano, M.Venhart

Alpha-gamma decay studies of ²⁵³No and its daughter products ²⁵³Md , ²⁴⁹Fm

RADIOACTIVITY ²⁵³No(α), (β⁺), (EC)[from ²⁰⁷Pb(⁴⁸Ca, 2n)], ²⁴⁹Fm, ²⁵³Md(α)[from ²⁵³No]; measured Eα, Iα, Eγ, Iγ, αγ-coin, ER. ²⁴⁹Es, ²⁴⁹Fm, ²⁵³Md, ²⁵³No deduced levels, J, π, γ transitions, α branching ratios calculated α-decay spectrum using GEANT4. Compared with data.

doi: 10.1140/epja/i2012-12075-8
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2012HO12      Eur.Phys.J. A 48, 62 (2012)

S.Hofmann, S.Heinz, R.Mann, J.Maurer, J.Khuyagbaatar, D.Ackermann, S.Antalic, W.Barth, M.Block, H.G.Burkhard, V.F.Comas, L.Dahl, K.Eberhardt, J.Gostic, R.A.Henderson, J.A.Heredia, F.P.Hessberger, J.M.Kenneally, B.Kindler, I.Kojouharov, J.V.Kratz, R.Lang, M.Leino, B.Lommel, K.J.Moody, G.Munzenberg, S.L.Nelson, K.Nishio, A.G.Popeko, J.Runke, S.Saro, D.A.Shaughnessy, M.A.Stoyer, P.Thorle-Pospiech, K.Tinschert, N.Trautmann, J.Uusitalo, P.A.Wilk, A.V.Yeremin

The reaction ⁴⁸Ca + ²⁴⁸Cm → ²⁹⁶116^* studied at the GSI-SHIP

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, X)²⁹²Lv/²⁹³Lv, E=265.4, 270.2 MeV; measured reaction products, Eα, Iα(t) from 116 decay, 116 fission using SHIP velocity filter. ^288,289Fl, ^284,285Cn, ²⁸¹Ds, ²⁷⁷Hs; deduced σ, T_1/2, ground state quadrupole deformation, quasiparticle excitations, Q-values for different α decay chains. Comparison with other data.

doi: 10.1140/epja/i2012-12062-1
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2012KH11      Phys.Rev. C 86, 064602 (2012)

J.Khuyagbaatar, K.Nishio, S.Hofmann, D.Ackermann, M.Block, S.Heinz, F.P.Hessberger, K.Hirose, H.Ikezoe, B.Kinlder, B.Lommel, H.Makii, S.Mitsuoka, I.Nishinaka, T.Ohtsuki, Y.Wakabayashi, S.Yan

Evidence for hindrance in fusion between sulfur and lead nuclei

NUCLEAR REACTIONS ^204,206,208Pb(³⁴S, F), (³⁶S, F), E=160-200 MeV; measured fission fragments, fission and ER σ at JAEA facility. Comparison with coupled-channel (HIVAP) calculations. Influence of coupling to the vibrational states in ³⁴S.

doi: 10.1103/PhysRevC.86.064602
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2012NO05      Phys.Rev. C 85, 044312 (2012)

C.Nociforo, A.Prochazka, R.Kanungo, T.Aumann, D.Boutin, D.Cortina-Gil, B.Davids, M.Diakaki, F.Farinon, H.Geissel, R.Gernhauser, R.Janik, B.Jonson, B.Kindler, R.Knobel, R.Krucken, N.Kurz, M.Lantz, H.Lenske, Yu.A.Litvinov, B.Lommel, K.Mahata, P.Maierbeck, A.Musumarra, T.Nilsson, C.Perro, C.Scheidenberger, B.Sitar, P.Strmen, B.Sun, I.Szarka, I.Tanihata, H.Weick, M.Winkler

One-neutron removal reactions on Al isotopes around the N=20 shell closure

NUCLEAR REACTIONS C(³³Al, ³²Al), (³⁴Al, ³³Al), (³⁵Al, ³⁴Al), (³⁶Al, ³⁵Al), [secondary ^33,34,35,36Al beams from ⁹Be(⁴⁸Ca, X), E=1 GeV/nucleon primary reaction], E=900 MeV/nucleon; measured time of flight, energy loss, longitudinal momentum distribution, one-neutron removal cross sections using FRS at GSI; deduced spectroscopic factors, occupation probabilities, theoretical single-particle cross sections. Momentum analysis within the eikonal model approach. Shell structure, magic numbers. Comparison with USDB, SDPF-M shell model calculations.

doi: 10.1103/PhysRevC.85.044312
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2011AN13      Eur.Phys.J. A 47, 62 (2011)

S.Antalic, F.P.Hessberger, D.Ackermann, S.Heinz, S.Hofmann, Z.Kalaninova, B.Kindler, J.Khuyagbaatar, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Streicher, B.Sulignano, M.Venhart

Isomeric states in ²⁵³No and ²⁵³Fm

RADIOACTIVITY ²⁵³Md, ²⁵³No(EC), (β⁺)[from ²⁰⁷Pb(⁴⁸Ca, 2n), E=218.4 MeV]; measured Eα, Iα, Eγ, Iγ(t), delayed αγ-coin, X-rays, Ex, Ix(t), Xγ-coin, βγ-coin, γγ-coin. ²⁵³No deduced isomer decay T_1/2, transition multipolatirities, levels, rotational band, ICC. ²⁵³Fm deduced levels, J, π, ICC, isomeric transition.

doi: 10.1140/epja/i2011-11062-y
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2011GA19      Phys.Rev. C 83, 054618 (2011)

J.M.Gates, Ch.E.Dullmann, M.Schadel, A.Yakushev, A.Turler, K.Eberhardt, J.V.Kratz, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, H.G.Essel, P.A.Ellison, J.Even, U.Forsberg, J.Gellanki, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.Krier, N.Kurz, S.Lahiri, D.Liebe, B.Lommel, M.Maiti, H.Nitsche, J.P.Omtvedt, E.Parr, D.Rudolph, J.Runke, H.Schaffner, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in the ²⁴⁴Pu(⁴⁸Ca, 3-4n) reaction

NUCLEAR REACTIONS ²⁰⁶Pb(⁴⁸Ca, 2n)²⁵²No, E=231.2 MeV; ²⁰⁷Pb(⁴⁸Ca, 2n)²⁵³No, E=231.2 MeV; ²⁰⁸Pb(⁴⁸Ca, 2n)²⁵⁴No, E=231.2 MeV; ²⁴⁴Pu(⁴⁸Ca, 3n)²⁸⁹Fl, E=254.6, 259.4 MeV; ²⁴⁴Pu(⁴⁸Ca, 4n)²⁸⁸Fl, E=254.6, 259.4 MeV; measured evaporation residue spectra, Eα, Iα, fission fragment spectra, Eγ, αγ-, α(particle)-coin, production cross sections. TASCA recoil separator at GSI. Comparison with previous measurements. RADIOACTIVITY ^252,253,254No, ^288,289Fl(α), (SF); measured Eα, half-lives, branching ratios for α and SF decay modes, (evaporation residues)α- and (evaporation residues)(fission fragments)-correlations, αγ-, γ(SF events)-coin. ²⁴⁸Fm, ²⁸¹Ds, ^284,285Cn, (α); measured Eα, EVR-α-α correlations, Eγ, half-lives. ²⁷⁷Hs(SF); measured total kinetic energy (TKE), half-life.

doi: 10.1103/PhysRevC.83.054618
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2011KA01      Phys.Rev. C 83, 021302 (2011)

R.Kanungo, A.Prochazka, W.Horiuchi, C.Nociforo, T.Aumann, D.Boutin, D.Cortina-Gil, B.Davids, M.Diakaki, F.Farinon, H.Geissel, R.Gernhauser, J.Gerl, R.Janik, B.Jonson, B.Kindler, R.Knobel, R.Krucken, M.Lantz, H.Lenske, Y.Litvinov, B.Lommel, K.Mahata, P.Maierbeck, A.Musumarra, T.Nilsson, C.Perro, C.Scheidenberger, B.Sitar, P.Strmen, B.Sun, Y.Suzuki, I.Szarka, I.Tanihata, Y.Utsuno, H.Weick, M.Winkler

Matter radii of ^32-35Mg

NUCLEAR REACTIONS C, H(³²Mg, X), (³³Mg, X)(³⁴Mg, X)(³⁵Mg, X), E=900 MeV/nucleon, [secondary Mg beams from Be(⁴⁸Ca, X) primary reaction]; measured interaction cross sections by detecting unreacted Mg particles by Bρ-ΔE-TOF method. ^32,33,34,35Mg; deduced matter radii by Glauber model analysis. Comparison with HF and RMF predictions. Neutron skin thickness.

doi: 10.1103/PhysRevC.83.021302
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2011KA30      Phys.Rev. C 84, 054607 (2011)

Sh.A.Kalandarov, G.G.Adamian, N.V.Antonenko, W.Scheid, S.Heinz, V.Comas, S.Hofmann, J.Khuyagbaatar, D.Ackermann, J.Heredia, F.P.Hessberger, B.Kindler, B.Lommel, R.Mann

Emission of clusters with Z > 2 from excited actinide nuclei

NUCLEAR REACTIONS ²⁰⁶Pb(²⁵Mg, X)²¹¹Po/²⁰⁸Rn/²⁰⁹Rn/²¹⁰Rn/²¹¹Rn/²¹²Rn/²¹³Rn/²⁰⁹Fr/²¹⁰Fr/²¹¹Fr/²¹²Fr/²¹³Fr/²¹²Ra/²¹³Ra/²¹⁴Ra/²¹⁵Ra/²¹⁴Th/²¹⁵Th/²¹⁶Th/²¹⁷Th/²¹⁸Th, E=5.9, 6.3, 8.7 MeV/nucleon; Pt(³⁶S, X)²⁰⁷Rn/²⁰⁸Rn/²⁰⁹Rn/²¹⁰Rn/²¹³Rn/²⁰⁹Fr/²¹⁰Fr/²¹¹Fr/²¹²Fr/²¹³Fr/²¹⁰Ra/²¹¹Ra/²¹²Ra/²¹³Ra/²¹⁴Ra/²¹⁵Ra, E=5.30, 5.50, 5.96 MeV/nucleon; W(⁴⁸Ca, X)²⁰⁷Rn/²⁰⁸Rn/²⁰⁹Rn/²¹⁰Rn/²¹³Rn/²⁰⁹Fr/²¹⁰Fr/²¹¹Fr/²¹²Fr/²¹⁰Ra/²¹¹Ra/²¹²Ra/²¹³Ra/²¹⁴Ra/²¹⁵Ra/²¹⁹Th/²²⁰Th/²²¹Th/²²²Th/²²³Th, E=5.41 MeV/nucleon; measured Eα, Iα, cross sections, charge, and isotopic distributions of the residual heavy nuclei, velocity spectra using SHIP filter at GSI. Emission of complex fragments with Z>2 Comparison with theoretical calculations using dinuclear system model.

doi: 10.1103/PhysRevC.84.054607
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2011KA36      Phys.Rev. C 84, 061304 (2011)

R.Kanungo, A.Prochazka, M.Uchida, W.Horiuchi, G.Hagen, T.Papenbrock, C.Nociforo, T.Aumann, D.Boutin, D.Cortina-Gil, B.Davids, M.Diakaki, F.Farinon, H.Geissel, R.Gernhauser, J.Gerl, R.Janik, O.Jensen, B.Jonson, B.Kindler, R.Knobel, R.Krucken, M.Lantz, H.Lenske, Y.Litvinov, B.Lommel, K.Mahata, P.Maierbeck, A.Musumarra, T.Nilsson, C.Perro, C.Scheidenberger, B.Sitar, P.Strmen, B.Sun, Y.Suzuki, I.Szarka, I.Tanihata, H.Weick, M.Winkler

Exploring the anomaly in the interaction cross section and matter radius of ²³O

NUCLEAR REACTIONS C(²²O, X), (²³O, X), [²²O, ²³O secondary beams from ⁹Be(⁴⁸Ca, X), E=1 GeV/nucleon primary reaction], E=900 MeV/nucleon; measured energy loss, time of flight, magnetic rigidity. ^22,23O; deduced interaction cross section, matter radii, neutron skin thickness. Glauber model analysis. Comparison with ab initio coupled-cluster theory.

doi: 10.1103/PhysRevC.84.061304
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2011VE03      Eur.Phys.J. A 47, 20 (2011)

M.Venhart, F.P.Hessberger, D.Ackermann, S.Antalic, C.Gray-Jones, P.T.Greenlees, S.Heinz, R.-D.Herzberg, S.Hofmann, S.Ketelhut, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, R.Mann, P.Papadakis, D.Rostron, D.Rudolph, S.Saro, B.Sulignano

Decay study of ²⁴⁶Fm at SHIP

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁰Ar, 2n), E=186.4 MeV; measured E(particle), I(particle, θ), Eα, Iα(t), E(CE), I(CE), Eγ, Iγ, X-rays, αβ-coin, αγ-coin, (ER)α-coin, (fragment)γ-coin. ²⁴⁶Fm calculated two-quasineutron levels, J, π using Woods-Saxon and self-consistent mean field with Gogny forces, T_1/2 for high-K states; deduced T_1/2, spontaneous fission T_1/2, α, SF, EC branching ratio, two-quasineutron levels. ²⁴²Cf deduced α, EC branching ratio.

doi: 10.1140/epja/i2011-11020-9
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2010AN01      J.Phys.(London) G37, 035102 (2010)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, V.F.Comas, J.Elseviers, S.Franchoo, S.Heinz, J.A.Heredia, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, R.D.Page, S.Rinta-Antila, P.J.Sapple, S.Saro, P.Van Duppen, M.Venhart, H.V.Watkins

The new isotope ¹⁷⁹Pb and α-decay properties of ¹⁷⁹Tl^m

RADIOACTIVITY ¹⁷⁹Tl, ¹⁷⁵Au, ¹⁷⁹Pb(α) [from ¹⁴⁴Sm(⁴⁰Ca, 5n), E=232 MeV]; measured Eα, Iα; deduced T_1/2, J, π.

RADIOACTIVITY ¹⁷²Pt(α); measured decay products, Eα, Iα; deduced %α branch.

doi: 10.1088/0954-3899/37/3/035102
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2010AN08      Eur.Phys.J. A 43, 35 (2010)

S.Antalic, F.P.Hessberger, S.Hofmann, D.Ackermann, S.Heinz, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, S.Saro

Studies of neutron-deficient mendelevium isotopes at SHIP

NUCLEAR REACTIONS ²⁰⁹Bi(⁴⁰Ar, 2n), (⁴⁰Ar, 3n), E=187, 198 MeV; measured Eγ, Iγ, Eα, Iα, αγ-, αα-coin; deduced σ. ²⁴²Es, ²⁴³Es, ²⁴⁶Fm, ^246,247Md; deduced levels, J, π, Q, branching ratios, T_1/2. Comparison with other data and calculations.

RADIOACTIVITY ^242,243Es, ^246,247Md(α), (SF); ²⁴⁶Md(EC) [from ²⁰⁹Bi(⁴⁰Ar, 2n), (⁴⁰Ar, 3n), E=187, 198 MeV and subsequent decays]; measured Eγ, Iγ, Eα, Iα, αγ-, αα-coin; deduced Q, branching ratios, T_1/2. Comparison with other data and calculations.

doi: 10.1140/epja/i2009-10896-0
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2010DU06      Phys.Rev.Lett. 104, 252701 (2010)

Ch.E.Dullmann, M.Schadel, A.Yakushev, A.Turler, K.Eberhardt, J.V.Kratz, D.Ackermann, L.-L.Andersson, M.Block, W.Bruchle, J.Dvorak, H.G.Essel, P.A.Ellison, J.Even, J.M.Gates, A.Gorshkov, R.Graeger, K.E.Gregorich, W.Hartmann, R.-D.Herzberg, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.Krier, N.Kurz, S.Lahiri, D.Liebe, B.Lommel, M.Maiti, H.Nitsche, J.P.Omtvedt, E.Parr, D.Rudolph, J.Runke, B.Schausten, E.Schimpf, A.Semchenkov, J.Steiner, P.Thorle-Pospiech, J.Uusitalo, M.Wegrzecki, N.Wiehl

Production and Decay of Element 114: High Cross Sections and the New Nucleus ²⁷⁷Hs

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, 3n)²⁸⁹Fl, ²⁴⁴Pu(⁴⁸Ca, 4n)²⁸⁸Fl, E=259.4, 254.6 MeV; measured reaction products, Eα, Iα; deduced σ, α-decay chains, T_1/2.

RADIOACTIVITY ^288,289Fl, ²⁸⁵Cn(α), ²⁸¹Ds(α), ²⁸⁴Cn, ²⁸¹Ds, ²⁷⁷Hs(SF); measured reaction products, Eα, Iα; deduced α-decay chains, T_1/2.

doi: 10.1103/PhysRevLett.104.252701
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2010GR04      Phys.Rev. C 81, 061601 (2010)

R.Graeger, D.Ackermann, M.Chelnokov, V.Chepigin, Ch.E.Dullmann, J.Dvorak, J.Even, A.Gorshkov, F.P.Hessberger, D.Hild, A.Hubner, E.Jager, J.Khuyagbaatar, B.Kindler, J.V.Kratz, J.Krier, A.Kuznetsov, B.Lommel, K.Nishio, H.Nitsche, J.P.Omtvedt, O.Petrushkin, D.Rudolph, J.Runke, F.Samadani, M.Schadel, B.Schausten, A.Turler, A.Yakushev, Q.Zhi

Experimental study of the ²³⁸U(³⁶S, 3-5n)^269-271Hs reaction leading to the observation of ²⁷⁰Hs

NUCLEAR REACTIONS ²³⁸U(³⁶S, 3n), (³⁶S, 4n), (³⁶S, 5n), E=256.4 MeV; measured reaction products using COMPACT system of efficient and rapid chemical-separation and online detection based on the cryo-thermo chromatography method. ^269,270,271Hs; deduced production σ.

RADIOACTIVITY ^269,270,271Hs, ^265,267Sg(α); measured decay products, Iα, Eα; deduced T_1/2, αα correlations; ^261,263Rf, ²⁶⁴Sg(SF); measured decay products, Eα, Iα; deduced α-SF correlations.

doi: 10.1103/PhysRevC.81.061601
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2010HE10      Eur.Phys.J. A 43, 55 (2010)

F.P.Hessberger, S.Antalic, B.Sulignano, D.Ackermann, S.Heinz, S.Hofmann, B.Kindler, J.Khuyagbaatar, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, K.Nishio, A.G.Popeko, S.Saro, B.Streicher, J.Uusitalo, M.Venhart, A.V.Yeremin

Decay studies of K isomers in ²⁵⁴No

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, 2n), E=213.6, 218.4 MeV; measured Eγ, Iγ, Eα, Iα, E(ce), I(ce), γγ-, γ(ce)-coin. ²⁵⁴No; deduced branching ratios, bands, levels, J, π, T_1/2, configurations.

RADIOACTIVITY ²⁵⁴Md, ²⁵⁴No(α), (EC) [from ²⁰⁸Pb(⁴⁸Ca, 2n), E=213.6, 218.4 MeV]; measured Eγ, Iγ, Eα, Iα, E(ce), I(ce), γγ-, γ(ce)-coin; deduced branching ratios, bands, levels, J, π, T_1/2, configurations.

doi: 10.1140/epja/i2009-10899-9
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2010HE11      Eur.Phys.J. A 43, 175 (2010)

F.P.Hessberger, S.Antalic, D.Ackermann, S.Heinz, S.Hofmann, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, R.Mann

Alpha-decay properties of ²⁶¹Bh

RADIOACTIVITY ²⁵³Lr, ²⁵⁷Db, ²⁶¹Bh(α) [²⁰⁹Bi(⁵⁴Cr, 2n), E=271 MeV]; measured Eα, Iα, Eγ, αγ-coin; calculated T_1/2, hindrance factors. ²⁵⁷Db, ²⁶¹Bh; deduced levels, J, π.

doi: 10.1140/epja/i2010-10913-3
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2010HE12      Eur.Phys.J. A 43, 181 (2010)

S.Heinz, V.Comas, S.Hofmann, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann

Investigation of di-nuclear systems as entrance channel to fusion

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, X)²¹¹Po/²¹²At/²¹³Rn/²¹³Fr/²¹⁴Ra, E=4.80, 5.00, 5.20, 5.40, 5.53, 5.92 MeV/nucleon; measured σ(θ), E(residue) using the SHIP facility.

doi: 10.1140/epja/i2010-10914-2
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2010HE14      Nucl.Phys. A834, 362c (2010)

S.Heinz, V.Comas, S.Hofmann, D.Ackermann, J.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann, C.Golabek, W.Mittig, F.Rejmund, A.C.C.Villari

Study of heavy di-nuclear systems

NUCLEAR REACTIONS ²⁰⁷Pb(⁶⁴Ni, X)²¹¹Po/²¹²At/²¹³Rn/²¹³Fr/²¹⁴Ra, E=4.80, 5.00, 5.20, 5.40, 5.53, 5.92 MeV/nucleon; measured Eα, Iα, σ(θ), yields, fragment energy spectra (TKE) using SHIP velocity filter. ²³⁸U(²³⁸U, X), E=6.09, 6.49, 6.91, 7.10, 7.35 MeV/nucleon; measured σ(θ), mass distributions, yields, fragment energy spectra (TKE) using VAMOS spectrometer; deduced interaction times using diffusion model.

doi: 10.1016/j.nuclphysa.2010.01.040
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2010HE25      Eur.Phys.J. A 46, 337 (2010)

J.A.Heredia, A.N.Andreyev, S.Antalic, S.Hofmann, D.Ackermann, V.F.Comas, S.Heinz, F.P.Hessberger, B.Kindler, J.Khuyagbaatar, B.Lommel, R.Mann

The new isotope ²⁰⁸Th

NUCLEAR REACTIONS ¹⁴⁷Sm(⁶⁴Ni, 2n), E=288 MeV;¹⁴⁷Sm(⁶⁴Ni, 3n), E=288, 294 MeV;¹⁵⁰Sm(⁶⁴Ni, 4n), E=294 MeV;¹⁵²Sm(⁶⁴Ni, 4n), E=288 MeV; measured Eα, Iα(t). ^{208,209,210,212}Th deduced α decay widths, T_1/2, α decay chains, ²⁰⁸Th new isotope. Comparison with other data.

doi: 10.1140/epja/i2010-11058-1
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2010KH06      Eur.Phys.J. A 46, 59 (2010)

J.Khuyagbaatar, F.P.Hessberger, S.Hofmann, D.Ackermann, V.S.Comas, S.Heinz, J.A.Heredia, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, K.Nishio, A.Yakushev

The new isotope ²³⁶Cm and new data on ²³³Cm and ^{237, 238, 240}Cf

NUCLEAR REACTIONS ^204,206,207Pb(³⁶Si, 2n), (³⁶Si, 3n), E=163.6, 170.3 MeV; measured Eα, Iα, evaporation residues, Eγ, Iγ, X-rays, (particle)γ-coin, (particle)X-coin. ^{237,238,239,240,241}Cf deduced σ.

RADIOACTIVITY ^237,238,240Cf(SF), (α); measured Eα, Iα, delayed αα-coin, TKE; deduced spontaneous fission T_1/2. ^237,240Cf deduced mass excess. ^238,240Cf deduced α-decay T_1/2. ^233,236Cm(α), (EC)[from Cf α decay]; measured Eα, Iα, Iβ; deduced α-decay T_1/2, α-branching. ²³⁶Cm deduced mass excess, spontaneous fission T_1/2. ²²⁹Pu(α); measured Eα, Iα(t); deduced T_1/2.

doi: 10.1140/epja/i2010-11026-9
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2010NI14      Phys.Rev. C 82, 024611 (2010)

K.Nishio, S.Hofmann, F.P.Hessberger, D.Ackermann, S.Antalic, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, A.Gorshkov, R.Graeger, K.Hagino, S.Heinz, J.A.Heredia, K.Hirose, H.Ikezoe, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, S.Mitsuoka, Y.Nagame, I.Nishinaka, T.Ohtsuki, A.G.Popeko, S.Saro, M.Schadel, A.Turler, Y.Watanabe, A.Yakushev, A.V.Yeremin

Nuclear orientation in the reaction ³⁴S+²³⁸U and synthesis of the new isotope ²⁶⁸Hs

NUCLEAR REACTIONS ²³⁸U(³⁴S, xn)²⁶⁷Hs/²⁶⁸Hs, E=148-170 MeV; measured evaporation residues and Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, production σ, fission σ(E), mass distribution of fission fragments as a function of energy. Comparison of fission σ(E) with calculations based on the three-dimensional Langevin equation and deformed target nuclei. Coupled-channel calculations for mass distributions. ^268,269Sg, ^272,273Hs, ^269,271,272Mt, ^{274,275,276,277}Sg, ^273,275,276Rg, ^{278,279,280,281}Cn; theoretical estimates of production rates in ²⁴³Am, ²⁴⁴Pu, ²⁴⁸Cm(³⁴S, xn), (³⁶S, xn) reactions.

RADIOACTIVITY ^267,268Hs(α)[from ²³⁸U(³⁴S, X), E=163.0 MeV]; ²⁶³Sg, ²⁵⁹Rf(α); ²⁶⁴Sg(SF); measured Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, half-lives; deduced Qα. Systematics of Qα values for even-even Z=104-114 and N=150-170 nuclei.

doi: 10.1103/PhysRevC.82.024611
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2010ST14      Eur.Phys.J. A 45, 275 (2010)

B.Streicher, F.P.Hessberger, S.Antalic, S.Hofmann, D.Ackermann, S.Heinz, B.Kindler, J.Khuyagbaatar, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, S.Saro, B.Sulignano, J.Uusitalo, M.Venhart

Alpha-gamma decay studies of ²⁶¹Sg and ²⁵⁷Rf

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁴Cr, n), (⁵⁴Cr, 2n), E=254-281 MeV; ²⁰⁸Pb(⁵⁴Cr, 2n), E=258 MeV; measured E(residue), I(residue, θ), Eα, Iα(θ), Eγ, Iγ; deduced σ.

RADIOACTIVITY ²⁵⁵Fm, ²⁵⁷No, ²⁵⁷Rf, ²⁶¹Sg(α); measured Eα, Iα, Eγ, Iγ, γγ-coin, αγ-coin, E(K X-rays). ²⁵¹Cf, ²⁵³Fm, ²⁵⁷Rf deduced levels, J, π; ²⁵⁷Rf isomer deduced T_1/2, decay scheme.

COMPILATION N=151, 153; compiled low-lying Nilsson levels; compared to Parkhomenko's calculations.

doi: 10.1140/epja/i2010-11005-2
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2009AN09      Acta Phys.Pol. B40, 763 (2009)

S.Antalic, F.P.Hessberger, S.Hofmann, D.Ackermann, S.Heinz, B.Kindler, I.Kojouharov, M.Leino, B.Lommel, R.Mann, K.Nishio, S.Saro, B.Sulignano, M.Venhart

Study of K-Isomers in Odd-Mass Nuclei at SHIP

2009AN11      Phys.Rev. C 79, 064320 (2009)

A.N.Andreyev, S.Antalic, D.Ackermann, L.Bianco, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, K.Nishio, R.D.Page, J.J.Ressler, P.Sapple, B.Streicher, S.Saro, B.Sulignano, J.Thomson, P.Van Duppen, M.Venhart

α decay of ¹⁹⁴At

NUCLEAR REACTIONS ¹⁴¹Pr(⁵⁶Fe, xn)¹⁹³Po/^193mPo/¹⁹³At/¹⁹⁴At/^194mAt/¹⁹⁵At, E=259 MeV]; measured Eα, Iα, recoil-α-α and α-γ correlations.

RADIOACTIVITY ^194,194mAt(α), ^190,190mBi(α)[from ¹⁴¹Pr(⁵⁶Fe, 3n), E=259 MeV]; measured Eα, Iα, Eγ, Iγ, γγ-, αγ-coin, isomer half-lives, recoil-α-α correlations. ¹⁹⁰Bi, ¹⁹⁴At; deduced levels, J, π, multipolarity, hindrance factors, configurations. ¹⁹³Po, ^193,195At(α); measured Eα.

doi: 10.1103/PhysRevC.79.064320
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2009AN14      Phys.Rev. C 80, 024302 (2009)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, V.F.Comas, J.Elseviers, S.Franchoo, S.Heinz, J.A.Heredia, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, R.D.Page, S.Rinta-Antila, P.J.Sapple, S.Saro, P.Van Duppen, M.Venhart, H.V.Watkins

Decay of the 9/2^- isomer in ¹⁸¹Tl and mass determination of low-lying states in ¹⁸¹Tl, ¹⁷⁷Au, and ¹⁷³Ir

RADIOACTIVITY ¹⁸¹Tl, ¹⁷⁷Au(α) [from ¹⁴⁴Sm(⁴⁰Ca, 2np)]; measured Eα, Iα, Eγ, Iγ, γγ-, αγ-coin, α-α correlations and half-lives; deduced branching ratios and hindrance factors. ¹⁷³Ir, ¹⁷⁷Au, ¹⁸¹Tl; deduced levels, J, π, isomers. ¹⁷³Ir, ^173mIr, ¹⁷⁷Au, ^177mAu, ¹⁸¹Tl, ^181mTl, ¹⁸⁵Bi; deduced mass excesses. Level energy systematics of odd-A Tl isotopes.

doi: 10.1103/PhysRevC.80.024302
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2009AN17      Phys.Rev. C 80, 044334 (2009)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, V.F.Comas, J.Elseviers, S.Franchoo, S.Heinz, J.A.Heredia, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, R.D.Page, S.Rinta-Antila, P.J.Sapple, S.Saro, P.Van Duppen, M.Venhart, H.V.Watkins

Identification and decay of the 0.48 ms 13/2⁺ isomer in ¹⁸¹Hg

NUCLEAR REACTIONS ¹⁴⁴Sm(⁴⁰Ca, n2p), E=177-229 MeV; measured Eγ, Iγ, γγ-coin, delayed γ, and half-lives. ¹⁸¹Hg; deduced levels, J, π, multipolarities, isomer. Comparison with earlier experimental data.

doi: 10.1103/PhysRevC.80.044334
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2009AN20      Phys.Rev. C 80, 054322 (2009)

A.N.Andreyev, S.Antalic, D.Ackermann, T.E.Cocolios, V.F.Comas, J.Elseviers, S.Franchoo, S.Heinz, J.A.Heredia, F.P.Hessberger, S.Hofmann, M.Huyse, J.Khuyagbaatar, I.Kojouharov, B.Kindler, B.Lommel, R.Mann, R.D.Page, S.Rinta-Antilla, P.J.Sapple, S.Saro, P.Van Duppen, M.Venhart, H.V.Watkins

α decay of ^{180, 181}Pb

RADIOACTIVITY ^180,181Pb(α) [from ¹⁴⁴Sm(⁴⁰Ca, xn), E=196 MeV];measured Eα, Iα, (evaporation residues)α-, αγ-coin, α-α correlations, and half-lives using SHIP at GSI facility; deduced branching ratios and α-reduced widths. ¹⁷⁷Hg; deduced levels, J, π. ^172,173Pt, ^176,177Hg(α); measured Eα, half-life. ¹⁷⁸Hg, ¹⁸²Pb; measured Eα.

doi: 10.1103/PhysRevC.80.054322
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2009HE20      Eur.Phys.J. A 41, 145 (2009)

F.P.Hessberger, S.Hofmann, B.Streicher, B.Sulignano, S.Antalic, D.Ackermann, S.Heinz, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, A.G.Popeko, S.Saro, J.Uusitalo, A.V.Yeremin

Decay properties of neutron-deficient isotopes of elements from Z = 101 to Z = 108

NUCLEAR REACTIONS ²⁰⁷Pb(⁵⁴Cr, n), (⁵⁴Cr, 2n), ²⁰⁸Pb(⁵⁸Fe, n), (⁵⁴Cr, 2n), ²⁰⁹Bi(⁵⁴Cr, n), (⁵⁰Ti, n), (⁵⁰Ti, 2n), (⁴⁸Ca, 4n), E not given; measured Eα, Iα, Eγ, (fragment)α-coin, αψ-coin, σ; deduced decay chain properties, T_1/2, levels, J, π. Comparison with other data and calculations.

RADIOACTIVITY ²⁴⁹Md, ²⁵³Lr, ^257,258Db, ^259,260Sg, ²⁶²Bh, ²⁶⁵Hs(α), (SF), (EC); measured Eα, Iα, T_1/2; deduced levels, J, π. Analysis of decay chains and production routes. Comparison with other data and calculations.

doi: 10.1140/epja/i2009-10826-2
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2009KA14      Phys.Rev.Lett. 102, 152501 (2009)

R.Kanungo, C.Nociforo, A.Prochazka, T.Aumann, D.Boutin, D.Cortina-Gil, B.Davids, M.Diakaki, F.Farinon, H.Geissel, R.Gernhauser, J.Gerl, R.Janik, B.Jonson, B.Kindler, R.Knobel, R.Krucken, M.Lantz, H.Lenske, Y.Litvinov, B.Lommel, K.Mahata, P.Maierbeck, A.Musumarra, T.Nilsson, T.Otsuka, C.Perro, C.Scheidenberger, B.Sitar, P.Strmen, B.Sun, I.Szarka, I.Tanihata, Y.Utsuno, H.Weick, M.Winkler

One-Neutron Removal Measurement Reveals ²⁴O as a New Doubly Magic Nucleus

NUCLEAR REACTIONS ¹²C(²⁴O, ²³O), E=920 MeV/nucleon; measured fragment spectra. ²⁴O; deduced one neutron removal spectroscopic factor. ²³O; deduced level energies.

doi: 10.1103/PhysRevLett.102.152501
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