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NSR database version of April 11, 2024.

Search: Author = F.P.Hessberger

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2022BL03      Riv.Nuovo Cimento Soc.Ital.Fis. 45, 279 (2022)

M.Block, F.Giacoppo, F.-P.Hessberger, S.Raeder

Recent progress in experiments on the heaviest nuclides at SHIP

doi: 10.1007/s40766-022-00030-5
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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, T1/2, 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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8054. Data from this article have been entered in the XUNDL database. For more information, click here.


2022HE04      Eur.Phys.J. A 58, 11 (2022)

F.P.Hessberger, S.Antalic, F.Giacoppo, B.Andel, D.Ackermann, M.Block, S.Heinz, J.Khuyagbaatar, I.Kojouharov, M.Venhart

Alpha-gamma decay studies of 247Md

RADIOACTIVITY 247Md(IT), (α), (SF) [from 209Bi(40Ar, X)247Md, E=184-188 MeV]; measured decay products, Eα, Iα, Eγ, Iγ, α-γ-coin. 243Es;deduced γ- and α-particles energies and intensities, J, π, isomeric state T1/2. Comparison with Nilsson levels. GSI Darmstadt, Penning source of the UNILAC, the velocity filter SHIP.

doi: 10.1140/epja/s10050-022-00663-4
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2022KA45      Phys.Rev. C 106, 054325 (2022)

O.Kaleja, B.Andjelic, O.Bezrodnova, K.Blaum, M.Block, S.Chenmarev, P.Chhetri, C.Droese, Ch.E.Dullmann, M.Eibach, S.Eliseev, J.Even, P.Filianin, F.Giacoppo, S.Gotz, Yu.Gusev, M.J.Gutierrez, F.P.Hessberger, N.Kalantar-Nayestanaki, J.J.W.van de Laar, M.Laatiaoui, S.Lohse, N.Martynova, E.Minaya Ramirez, A.K.Mistry, T.Murbock, Yu.Novikov, S.Raeder, D.Rodriguez, F.Schneider, L.Schweikhard, P.G.Thirolf, A.Yakushev

Direct high-precision mass spectrometry of superheavy elements with SHIPTRAP

ATOMIC MASSES 251,254No, 254,255,256Lr, 257Rf; measured cyclotron frequency; deduced mass excesses, two-neutron shell gap. Comparison to AME2020. Phase-imaging ion-cyclotron resonance mass spectrometry (PI-ICR MS) at SHIPTRAP setup. Isotopes produced in following reactions 206Pb(48Ca, 3n)251No, E=4.8 MeV/nucleon, 208Pb(48Ca, 2n)254No, E=4.56 MeV/nucleon, 209Bi(48Ca, 3n)254Lr, E=4.81 MeV/nucleon, 209Bi(48Ca, 2n)255Lr, E=4.56 MeV/nucleon, 209Bi(48Ca, n)256Lr, E=4.5 MeV/nucleon, 208Pb(50Ti, n)257Rf, E=4.65 MeV/nucleon at GSI Darmstadt.

RADIOACTIVITY 258Db, 254Lr(α); deduced Q values. Comparison to other experimental data.

doi: 10.1103/PhysRevC.106.054325
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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, T1/2 of g.s. and two isomers using double-sided silicon strips detectors, and a multiwire proportional counter (MWPC). 250,250mNo; deduced T1/2, 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.


2021HE15      Phys.Rev.Lett. 126, 182501 (2021)

F.P.Hessberger, M.Block, C.E.Dullmann, A.Yakushev, M.Leino, J.Uusitalo

Some Remarks on the Discovery of 244

RADIOACTIVITY 244Md(α) [from 209Bi(40Ar, 5n)244Md, E not given]; analyzed available data, Eα, Iα. 245,246Md, 245Fm; deduced that results should be attributed to 245Md with small contributions (one event each) from 245Fm and probably 246Md.

doi: 10.1103/PhysRevLett.126.182501
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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.


2020DE36      Eur.Phys.J. A 56, 224 (2020)

H.M.Devaraja, S.Heinz, D.Ackermann, T.Gobel, F.P.Hessberger, S.Hofmann, J.Maurer, G.Munzenberg, A.G.Popeko, A.V.Yeremin

New studies and a short review of heavy neutron-rich transfer products

NUCLEAR REACTIONS 238U(48Ca, X), E=233.3 MeV; measured reaction products, Eγ, Iγ. 207,208,209,210Tl, 211,212,213,214Pb, 211,212,213,214Bi, 213,214,215,216,217,218Po, 213,214,215,216,217At, 213Rn, 217,218,219,220,221,222Rn, 214Fr, 219Fr, 221Fr, 215Ra, 220,221,222,223,224Ra, 216Ac, 221Ac, 223Ac, 225,226,227,228,229Ac, 223,224Th, 226Th, 231,233Th, 232,234,236Pa, 237,238Pa, 230U, 237U, 239U, 238,239,240,241,242Np; deduced isotopic distributions, production σ.

doi: 10.1140/epja/s10050-020-00229-2
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2020KA02      Phys.Rev. C 101, 011301 (2020)

J.Kallunkathariyil, B.Sulignano, P.T.Greenlees, J.Khuyagbaatar, Ch.Theisen, K.Auranen, H.Badran, F.Bisso, P.Brionnet, R.Briselet, A.Drouart, Z.Favier, T.Goigoux, T.Grahn, K.Hauschild, A.Herzan, F.P.Hessberger, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.Lightfoot, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, K.Rezynkina, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, M.Siciliano, J.Sorri, S.Stolze, A.I.Svirikhin, J.Uusitalo, M.Vandebrouck, A.Ward, C.Wraith, M.Zielinska

Stability of the heaviest elements: K isomer in 250No

NUCLEAR REACTIONS 204Pb(48Ca, 2n)250No, E=218.0 MeV; measured evaporation residues (ER), fission (SF) events, ER-electron-SF correlated events, γ(electron)-coin, half-lives of an isomer and the ground state using RITU separator and GREAT spectrometer at the University of Jyvaskyla accelerator facility. 250No; deduced level, isomer, decay modes of the isomer and the ground state. Systematics of energies of isomers in N=148 isomers 242Pu, 244Cm, 246Cf, 248Fm, 250No. Relevance to the island of stability of superheavy elements.

doi: 10.1103/PhysRevC.101.011301
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Data from this article have been entered in the XUNDL database. For more information, click here.


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, T1/2 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 T1/2 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, T1/2. 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-α12-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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8036.


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, 258Rf

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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2019BA22      Phys.Rev. C 99, 054317 (2019)

A.E.Barzakh, J.G.Cubiss, A.N.Andreyev, M.D.Seliverstov, B.Andel, S.Antalic, P.Ascher, D.Atanasov, D.Beck, J.Bieron, K.Blaum, Ch.Borgmann, M.Breitenfeldt, L.Capponi, T.E.Cocolios, T.Day Goodacre, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Fritzsche, L.P.Gaffney, S.George, L.Ghys, F.P.Hessberger, M.Huyse, N.Imai, Z.Kalaninova, D.Kisler, U.Koster, M.Kowalska, S.Kreim, J.F.W.Lane, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, S.Mitsuoka, P.L.Molkanov, Y.Nagame, D.Neidherr, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, J.P.Revill, M.Rosenbusch, R.E.Rossel, S.Rothe, K.Sandhu, L.Schweikhard, S.Sels, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, P.Van Duppen, Y.Wakabayashi, K.D.A.Wendt, F.Wienholtz, B.W.Whitmore, G.L.Wilson, R.N.Wolf, K.Zuber

Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in 217, 218, 219At revealed by in-source laser spectroscopy

NUCLEAR MOMENTS 217,218,219At; measured hyperfine structure spectra, isotopic shifts, and hyperfine splitting constants using in-source resonance-ionization technique at CERN-ISOLDE; deduced magnetic dipole and electric quadrupole moments, changes in nuclear mean-square charge radii, octupole collectivity. 217,218,219At isotopes produced in U(p, X), E=1.4 GeV reaction. Systematics of g factors in 209,211,213Bi, 211,217,219At, 213,219,221,223,225Fr, 215,217,227Ac, changes in rms charge radii for 207,208,209,210,211,217,218,219At, shell-effect parameters in Pb, Bi, Po, At, Rn, Fr, Ra, Ac isotopes, and odd-even staggering in 205,207,209,211Pb, 207,209,217Po, 208,210,218At, 210,212,220,222,224,226Fr, 219,221Rn, 221,223,225,227Ra.

doi: 10.1103/PhysRevC.99.054317
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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, 256,257,259,260Md, 259No, 262,263Lr(SF), (α); calculated T1/2, SF branching ratio.

doi: 10.1140/epja/i2019-12696-3
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8038.


2019GH11      Phys.Rev. C 100, 054310 (2019)

L.Ghys, A.N.Andreyev, M.Huyse, P.Van Duppen, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, J.Cubiss, X.Derkx, H.De Witte, J.Elseviers, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, S.Mitsuoka, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, R.D.Page, L.Popescu, D.Radulov, M.M.Rajabali, E.Rapisarda, K.Sandhu, V.L.Truesdale, P.Van den Bergh, Y.Wakabayashi

α-decay properties of 200, 202Fr

RADIOACTIVITY 200,202,202mFr, 196,198,198mAt, 194,192Bi(α)[from 238U(p, F), E=1.4 GeV]; measured Eα, Iα, Eγ, Iγ, αγ- and αγγ-coin, half-lives of 200Fr g.s., 198At g.s. and 198At isomer using the windmill detection setup at ISOLDE-CERN; 196,198At, 192,194Bi; deduced levels, J, π, total conversion coefficients, multipolarities, α-reduced widths. 190Tl, 194Bi, 198At, 202Fr, 206Ac; deduced energies of the isomeric states and compared to previous experimental values. 198,202Po, 200,202At, 202Rn(α); measured Eα. Systematics of 206Ac to 190Tl and 200Fr to 188Tl decay chains. Systematics of α-reduced widths for odd-odd A=184-201 Fr, At and Bi α-emitters.

doi: 10.1103/PhysRevC.100.054310
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2019HE17      Eur.Phys.J. A 55, 208 (2019)

F.P.Hessberger

On the synthesis of 258Rf via p-deexcitation in the complete fusion reaction 50Ti + 209Bi

doi: 10.1140/epja/i2019-12912-2
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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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2019MI08      Nucl.Phys. A987, 337 (2019)

A.K.Mistry, J.Khuyagbaatar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, N.Kurz, M.Laatiaoui, L.Lens, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev, Z.Zhang

The 48Ca+181Ta reaction: Cross section studies and investigation of neutron-deficient 86 ≤ Z ≤ 93 isotopes

NUCLEAR REACTIONS 181Ta(48Ca, x)229Np, E(cm)=212, 217, 226 MeV[energies based on σ predictions by the HIVAP code]; measured xn, αxn, pxn leading to 225Np, 225U, 224Np, Evaporation Residues (ER) separated from 48Ca primary beam using the SHIP velocity filter at GSI, ToF and COMPAct Spectroscopy Set-up (COMPASS) comprising of DSSDs and SSSDs; deduced 225U, 225,226,229Np decay chains; 213Rn, 213,214,215Fr, 217,218,219Ac, 221Th, 221,222,223Pa, 225U, 225,226Np; deduced decay data, T1/2; compared with literature values; compiled production σ maxima in 3n and 4n evaporation channels from compound nuclei with Z=83-94 and projectiles 40Ar, 40,44,48Ca, 50Ti using published experimental data.

doi: 10.1016/j.nuclphysa.2019.05.003
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2019VO03      Eur.Phys.J. A 55, 17 (2019)

M.Vostinar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, Ch.Droese, J.Even, S.Heinz, Z.Kalaninova, I.Kojouharov, M.Laatiaoui, A.K.Mistry, J.Piot, H.Savajols

Alpha-gamma decay studies of 258Db and its (grand)daughter nuclei 254Lr and 250Md

NUCLEAR REACTIONS 209Bi(50Ti, n)258Db, E=236 MeV; measured (after separation of evaporation residues with kinetic energy 50 MeV by the SHIP velocity filter) emitted particles using position sensitive Si strip detector, six SSSDs arranged in a box surrounding the stop detector, Eγ, Iγ, X-rays using HPGe clover detector, subsequent α-decay and SF events, T1/2 using time difference between evaporation residues implantation and subsequent α-decay of the isotopes, 258Db α-decays αγ-coin, αX-rays coin; deduced α, γ transitions, levels, J, π. 250Md, 254Lr, 254No; deduced α-decays, levels, γ transitions, Qα systematics for 250Md. 254Lr, 258Db; deduced levels, J, π, possible single-particle states configurations.

doi: 10.1140/epja/i2019-12701-y
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2018AC08      Nucl.Instrum.Methods Phys.Res. A907, 81 (2018)

D.Ackermann, A.K.Mistry, F.P.Hessberger, B.Andel, S.Antalic, M.Block, L.Caceres, P.Chhetri, F.Dechery, Ch.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, O.Kamalou, N.Kurz, J.Khuyagbaatar, R.R.Mandl, T.Murbock, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, H.Savajols, O.Sorlin, Ch.Stodel, J.C.Thomas, M.Vostinar, P.Wieczorek, A.Yakushev, Z.Zhang

COMPASS-A COMPAct decay spectroscopy set-up

RADIOACTIVITY 253No(α) [from 207Pb(48Ca, 2n), E not given]; measured decay products, Eγ, Iγ, Eα, Iα, α-γ-coin.; deduced α-decay spectrum, branching ratios.

doi: 10.1016/j.nima.2018.01.096
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2018CH45      Acta Phys.Pol. B49, 599 (2018)

P.Chhetri, C.S.Moodley, S.Raeder, M.Block, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Eibach, O.Kaleja, M.Laatiaoui, A.K.Mistry, T.Murbock, Th.Walther

Investigation of the First Ionization Potential of Ytterbium in Argon Buffer Gas

ATOMIC PHYSICS Yb; measured photoexcitation to excite Rydberg states in natYb (chemical homologue of No) using the fact of recent observation of such states in No (Z=102) inside buffer gas cell; measured Rydberg levels with a similar principle quantum number as observed on-line for No using laser resonance ionization spectroscopy ultra-sensitive method based on RAdiation Detected Resonance Ionization Spectroscopy (RADRIS) technique in a buffer gas environment laser resonance ionization spectroscopy in a buffer gas cell to determine the ionization potential of Yb (Z=70); deduced Rydberg states energy, principal quantum number, ionization potentials and the dependence on gas pressure; extrapolated ionization potential in vacuum; compared with literature value.

doi: 10.5506/aphyspolb.49.599
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2018CU02      Phys.Rev. C 97, 054327 (2018)

J.G.Cubiss, A.E.Barzakh, M.D.Seliverstov, A.N.Andreyev, B.Andel, S.Antalic, P.Ascher, D.Atanasov, D.Beck, J.Bieron, K.Blaum, Ch.Borgmann, M.Breitenfeldt, L.Capponi, T.E.Cocolios, T.Day Goodacre, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Fritzsche, L.P.Gaffney, S.George, L.Ghys, F.P.Hessberger, M.Huyse, N.Imai, Z.Kalaninova, D.Kisler, U.Koster, M.Kowalska, S.Kreim, J.F.W.Lane, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, S.Mitsuoka, P.L.Molkanov, Y.Nagame, D.Neidherr, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, J.P.Revill, M.Rosenbusch, R.E.Rossel, S.Rothe, K.Sandhu, L.Schweikhard, S.Sels, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi, P.Van Duppen, K.D.A.Wendt, F.Wienholtz, B.W.Whitmore, G.L.Wilson, R.N.Wolf, K.Zuber

Charge radii and electromagnetic moments of 195-211At

NUCLEAR MOMENTS 195,195m,196,197,197m,198,198m,199,199m,200,200m,201,202,202m,203,204,205,206,207,208,209,210,211At; measured hfs spectra, hyperfine coupling constants, isotope shifts, and rms charge radii using the in-source resonance-ionization spectroscopy method, and Multi-Reflection Time-of-Flight Mass Spectrometer (MR-TOF MS) at CERN-ISOLDE; deduced magnetic dipole moments and spectroscopic quadrupole moments, configurations, and quadrupole deformation parameters. 206At; deduced J. Detailed systematics of magnetic dipole moments, spectroscopic quadrupole moments, deformations, and rms charge radii in Hg, Tl, Pb, Bi, Po, At, Fr, Ra and Ac nuclei. Comparison with theoretical calculations using multiconfiguration Dirac-Hartree-Fock (MCDHF) method.

NUCLEAR REACTIONS U(p, X)195At/195mAt/196At/197At/197mAt/198At/198mAt/199At/199mAt/200At/200m1At/200m2At/201At/202At/202mAt/203At/204At/205At/206At/207At/208At/209At/210At/211At, E=1.4 GeV; produced radioactive astatine isotopes by spallation reaction with beam from CERN PS Booster impinging on a thick UCx target, followed by injection into a hot cavity of the Resonance Ionization Laser Ion Source (RILIS), and ionization by a three-step photoionization scheme.

doi: 10.1103/PhysRevC.97.054327
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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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2018MI11      Acta Phys.Pol. B49, 613 (2018)

A.K.Mistry, Z.Zhang, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, J.Khuyagbaatar, N.Kurz, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

RADIOACTIVITY 250Fm, 254No(α)[Nobelium from 48Ca(208Pb, 2n), E=4.55 MeV/nucleon]; measured Eα, Iα(time), αα-coin; deduced α-decay energy spectrum, Iα vs time, T1/2, αFmαNo correlation, T1/2. 222Th, 218Ra, 214Rn(α)[from α-decays 230Pu to 226U to 232Th to218Ra to 214Rn]; measured α-decay trace 222Th to 218Ra to n, Eα, Iα(time), αα-coin, αα-correlations; deduced summary of α-decay chains starting with 227U, 229Np, 229,230Pu using also literature references.

doi: 10.5506/aphyspolb.49.613
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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, 258Rf

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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2018RA11      Phys.Rev.Lett. 120, 232503 (2018)

S.Raeder, D.Ackermann, H.Backe, R.Beerwerth, J.C.Berengut, M.Block, A.Borschevsky, B.Cheal, P.Chhetri, Ch.E.Dullmann, V.A.Dzuba, E.Eliav, J.Even, R.Ferrer, V.V.Flambaum, S.Fritzsche, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, U.Kaldor, O.Kaleja, J.Khuyagbaatar, P.Kunz, M.Laatiaoui, F.Lautenschlager, W.Lauth, A.K.Mistry, E.Minaya Ramirez, W.Nazarewicz, S.G.Porsev, M.S.Safronova, U.I.Safronova, B.Schuetrumpf, P.Van Duppen, T.Walther, C.Wraith, A.Yakushev

Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy

NUCLEAR MOMENTS 252,253,254No; measured excitation spectra, hyperfine structure components; deduced nuclear magnetic and quadrupole moments, charge radii. Comparison with the state-of-the-art nuclear density functional calculations.

doi: 10.1103/PhysRevLett.120.232503
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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,220,221Ra, 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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2017GI07      Acta Phys.Pol. B48, 423 (2017)

F.Giacoppo, K.Blaum, M.Block, P.Chhetri, Ch.E.Dullmann, C.Droese, S.Eliseev, P.Filianin, S.Gotz, Y.Gusev, F.Herfurth, F.P.Hessberger, O.Kaleja, J.Khuyagbaatar, M.Laatiaoui, F.Lautenschlager, C.Lorenz, G.Marx, E.Minaya Ramirez, A.Mistry, Yu.N.Novikov, W.R.Plass, S.Raeder, D.Rodriguez, D.Rudolph, L.G.Sarmiento, C.Scheidenberger, L.Schweikhard, P.Thirolf, A.Yakushev

Recent Upgrades of the SHIPTRAP Setup: On the Finish Line Towards Direct Mass Spectroscopy of Superheavy Elements

doi: 10.5506/APhysPolB.48.423
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2017HE08      Eur.Phys.J. A 53, 75 (2017)

F.P.Hessberger

Spontaneous fission properties of superheavy elements

RADIOACTIVITY 234,235,238U, 253Lr(SF); calculated T1/2;compared with other calculations and data.

COMPILATION 231,232,233,234,235,236,237,238,239,240U, 246,248,250,252,254,256Cf, 242,244,246,248,250,252,254,256,258Fm, 252,254,256,258,260,262No, 254,256,258,260,262,264Rf, 256,258,260,262,264,268Sg, 258,260,262,264,266,268,270,272,274,276,278,280,282,284,286,288Hs, 270Ds, 262,264,266,269,270,272,274,276,278,280,282,284,286,288,290,292,294,296,298,300,302Cn, 268,270,272,274,276,278,280,282,284,286,288,290,292,294,296,298,300,302,304Fl, 292,294,296,298,300,302,304,306,308120; 232Th, 230U, 236,238,239,240,241,242,244Pu, 241,243Am, 234,236,240,242,243,244,245,246,248,250Cm, 249Bk, 237,238,240,242,249Cf, 253,255,257Es, 241,243,255,257,259Fm, 245,247,247m,259Md, 250,251,257No, 251,253,253m,259,261Lr, 253,255,257,257m,259,261,261m,263,265,267Rf, 255,255m,257,257m,261,263,267Db, 259m,261,265,265m,266,267,271Sg, 277Hs, 277Mt, 279,280,281Ds, 281Rg, 283,283mCn; compiled fission experimental and calculated barriers, T1/2, %SF, HF, Nilsson configurations.

doi: 10.1140/epja/i2017-12260-3
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2017HE11      Eur.Phys.J. A 53, 123 (2017)

F.P.Hessberger, D.Ackermann

Some critical remarks on a sequence of events interpreted to possibly originate from a decay chain of an element 120 isotope

NUCLEAR REACTIONS 248Cm(54Cr, x), E not given; analyzed data from SHIP at GSI Darmstadt; deduced low probability that the sequence of 3 α-particles followed by spontaneous fission belongs to the element 120.

doi: 10.1140/epja/i2017-12307-5
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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 T1/2, branching ratios, electron-capture delayed fission (ECDF) probability. Comparison with available data.

doi: 10.1016/j.physletb.2016.11.038
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2017LO13      Phys.Rev. C 96, 034315 (2017)

Ch.Lorenz, L.G.Sarmiento, D.Rudolph, D.E.Ward, M.Block, F.P.Hessberger, D.Ackermann, L.-L.Andersson, M.L.Cortes, C.Droese, M.Dworschak, M.Eibach, U.Forsberg, P.Golubev, R.Hoischen, I.Kojouharov, J.Khuyagbaatar, D.Nesterenko, I.Ragnarsson, H.Schaffner, L.Schweikhard, S.Stolze, J.Wenzl

Quantum-state-selective decay spectroscopy of 213Ra

RADIOACTIVITY 213Ra(α), (EC), (β+)[from 170Er(48Ca, 5n), E=4.30 MeV/nucleon using velocity filter SHIP and SHIPTRAP Penning trap at GSI UNILAC facility]; 209Rn(α), (EC), (β+)[from 213Ra α decay]; 213Fr(α), (EC), (β+)[from 213Ra EC decay]; 209At(α), (EC), (β+)[from 209Rn EC decay]; measured Eα, Iα, Eγ, Iγ, αγ-coin, (x ray)α-coin, α and EC+β+ branching ratios using TASISpec setup at GSI. GEANT4 simulations. 209Rn; deduced levels, α feedings, γ-ray branching ratios, multipolarity. Comparison with evaluated data, and Nilsson-Strutinsky and shell-model calculations. 209Rn; calculated levels, J, π using shell model with pbpop interaction, total energy surface in (ϵ2, ϵ4) plane, and compared with experimental data, and other theoretical calculations.

doi: 10.1103/PhysRevC.96.034315
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2017WI13      Phys.Rev. C 96, 044315 (2017)

G.L.Wilson, M.Takeyama, A.N.Andreyev, B.Andel, S.Antalic, W.N.Catford, L.Ghys, H.Haba, F.P.Hessberger, M.Huang, D.Kaji, Z.Kalaninova, K.Morimoto, K.Morita, M.Murakami, K.Nishio, R.Orlandi, A.G.Smith, K.Tanaka, Y.Wakabayashi, S.Yamaki

β-delayed fission of 230Am

RADIOACTIVITY 230Am(β+F)[from 207Pb(27Al, 4n), E=145 MeV]; measured fission fragments, double-fold fission fragment coincidences, total energy spectrum, α-α correlations using the GARIS recoil-ion separator at RIKEN. Analyzed TKE(230Pu); deduced T1/2 for 230Am, lower limit of β-delayed fission probability of 230Am. Systematics of β+-delayed fission probabilities for 230,232,234Am, 240,242,244,246,248Es, 236,238,240Bk nuclei. 230Am found to have the highest lower limit for β+-delayed fission probability so far among all the known nuclei decaying by this mode.

doi: 10.1103/PhysRevC.96.044315
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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 T1/2. 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 T1/2. Comparison with available data.

doi: 10.1016/j.nuclphysa.2016.04.025
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2016FO16      Phys.Lett. B 760, 293 (2016)

U.Forsberg, D.Rudolph, C.Fahlander, P.Golubev, L.G.Sarmiento, S.Aberg, M.Block, Ch.E.Dullmann, F.P.Hessberger, J.V.Kratz, A.Yakushev

A new assessment of the alleged link between element 115 and element 117 decay chains

NUCLEAR STRUCTURE 293Ts, 289Mc; analyzed available data; deduced cross-reaction link between α-decay chains.

doi: 10.1016/j.physletb.2016.07.008
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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 T1/2. 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, T1/2; 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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2016LA25      Nature(London) 535, 495 (2016)

M.Laatiaoui, W.Lauth, H.Backe, Mi.Block, D.Ackermann, B.Cheal, P.Chhetri, C.E.Dullmann, P.van Duppen, J.Even, R.Ferrer, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, O.Kaleja, J.Khuyagbaatar, P.Kunz, F.Lautenschlager, A.K.Mistry, S.Raeder, E.Minaya Ramirez, T.Walther, C.Wraith, A.Yakushev

Atom-at-a-time laser resonance ionization spectroscopy of nobelium

NUCLEAR REACTIONS 206,208Pb(48Ca, 2n), E=217 MeV; measured reaction products; deduced σ, ground-state transition, an upper limit for the ionization potential of nobelium.

doi: 10.1038/nature19345
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2016TR07      Phys.Rev. C 94, 034308 (2016)

V.L.Truesdale, A.N.Andreyev, L.Ghys, M.Huyse, P.Van Duppen, S.Sels, B.Andel, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, S.Mitsuoka, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, S.Rothe, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi

β-delayed fission and α decay of 196At

RADIOACTIVITY 196At, 196Po(α); 196At(EC), (β+), (β+F), [high purity 196At beam from U(p, X), E=1.4 GeV using HRS and GPS separators with RILIS at ISOLDE-CERN facility]; measured Eα, Iα, Eγ, Iγ, αγ-coin, fission-fragment energies, (fission fragment)(fission fragment)-coin, half-lives of decays of 196At and 196Po; deduced α- and β-decay and β-delayed fission branching ratios of 196At, reduced α-decay widths, symmetric and asymmetric fission-fragment mass distributions of the daughter isotope 196Po. 192Bi; deduced levels, J, π, conversion coefficients, multipolarities, mixing ratio, configurations. Comparison with previous experimental values. 192Bi, 199,200,201At, 202Rn; observed α from daughter activity 192Bi and other contaminants.

doi: 10.1103/PhysRevC.94.034308
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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, T1/2. 255Rf, 259Sg; deduced isomeric state, T1/2. 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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2015AS05      Nucl.Phys. A944, 308 (2015)

M.Asai, F.P.Hessberger, A.Lopez-Martens

Nuclear structure of elements with 100 ≤ Z ≤ 109 from alpha spectroscopy

NUCLEAR STRUCTURE 245Pu, 247Cm, 249Cf, 251Fm, 253No, 255Rf, 257Sg, 259Hs, 249Cm, 251Cf, 253Fm, 255No, 257Rf, 259Sg, 261Hs, 249Pu, 251Cm, 253Cf, 255Fm, 257No, 259Rf, 261Sg, 263Hs; calculated energy levels, J, π, Nilsson single-particle energies, deformation parameters. Comparison with available data.

RADIOACTIVITY 247Cm, 249Cf, 251Fm, 253No, 255Rf, 257Sg, 251Cf, 253Fm, 255No, 257Rf, 259Sg, 261Hs(α), 247Cm, 249Cf, 251Fm, 253No(IT), 249Cm, 251Cf, 253Fm, 257Rf, 259Sg(IT), 253Cf, 255Fm, 257No, 259Rf, 261Sg(α), 259No, 261Rf(α); analyzed decay products, Eα, Iα, Eγ, Iγ, α-γ-coin.; deduced energy levels, J, π, T1/2. Internal-conversion-electron coincidence spectroscopy.

doi: 10.1016/j.nuclphysa.2015.06.011
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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, T1/2. 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 T1/2, 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, 190Hg formed in fusion reactions of 36Ar + 144, 154Sm

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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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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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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2014GH09      Phys.Rev. C 90, 041301 (2014)

L.Ghys, A.N.Andreyev, M.Huyse, P.Van Duppen, S.Sels, B.Andel, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, S.Mitsuoka, P.Moller, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, R.D.Page, L.Popescu, D.Radulov, M.M.Rajabali, J.Randrup, E.Rapisarda, S.Rothe, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi, M.Warda

Evolution of fission-fragment mass distributions in the neutron-deficient lead region

RADIOACTIVITY 194,196At, 200,202Fr(β+F)[from U(p, X), E=1.4 GeV at CERN-ISOLDE using HRS and GPS separators]; measured mass and energy distributions of coincident fission fragments after β-delayed fission, ratio of α to β-delayed-fission decays, total kinetic energy. 196At, 200Fr; deduced β-delayed fission decay probabilities, new region of multimodal fission in the neutron-deficient lead region. 196Po; Calculated potential energy surface contour. Comparison with Finite-range liquid-drop (FRLDM) and Hartree-Fock-Bogoliubov (HFB) model calculations. Comparison with experimental results for β-delayed fission of 180Tl.

doi: 10.1103/PhysRevC.90.041301
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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,202,202mFr, 201,201m,202,203,203mRa(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 α12, 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 T1/2. 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 T1/2, correlated α-decay chains. Comparison with available data.

doi: 10.5506/APhysPolB.45.263
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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, 194At

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, T1/2 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 T1/2.

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 T1/2 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 179Tlg175Aug171Irg167Rem

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, T1/2, 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, 64Ni + 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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2013DR04      Eur.Phys.J. A 49, 13 (2013)

C.Droese, D.Ackermann, L.-L.Andersson, K.Blaum, M.Block, M.Dworschak, M.Eibach, S.Eliseev, U.Forsberg, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, G.Marx, E.Minaya Ramirez, D.Nesterenko, Yu.N.Novikov, W.R.Plass, D.Rodriguez, D.Rudolph, C.Scheidenberger, L.Schweikhard, S.Stolze, P.G.Thirolf, C.Weber

High-precision mass measurements of 203-207Rn and 213Ra with SHIPTRAP

NUCLEAR REACTIONS Dy(48Ca, 204Rn), (48Ca, 205Rn), (48Ca, 206Rn), (48Ca, 207Rn), E=4.4 MeV/nucleon;170Er(48Ca, 213Ra), E=4.4 MeV;170Er(40Ar, 203Rn), (40Ar, 204Rn), (40Ar, 205Rn), E=4.7 MeV/nucleon;160Gd(50Ti, 204Rn), (40Ar, 205Rn), (40Ar, 206Rn), E=4.55 MeV/nucleon; measured evaporation residues, frequency ratio using tandem Penning trap spectrometer SHIPTRAP; deduced σ, mass excess, 2n separation energy; calculated σ using statistical model code HIVAP. Compared with AME; 2n separation energy compared with trends for Pb, Po, Rn, Ra.

ATOMIC MASSES 203,204,205,206,207Rn, 213Ra; measured frequency ratio, number of resonances; deduced mass. Compared with AME 2003.

doi: 10.1140/epja/i2013-13013-0
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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, T1/2 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, 193,194,195,196Po(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, 188Bi 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, T1/2 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 T1/2, 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) T1/2 as function of peaks in angular distributions. 212mAt, 213Rn, 213Fr, 215Ra deduced σ(θ) vs cm velocity, TKE, T1/2 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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2012GR12      Phys.Rev.Lett. 109, 012501 (2012)

P.T.Greenlees, J.Rubert, J.Piot, B.J.P.Gall, L.L.Andersson, M.Asai, Z.Asfari, D.M.Cox, F.Dechery, O.Dorvaux, T.Grahn, K.Hauschild, G.Henning, A.Herzan, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, T.-L.Khoo, M.Leino, J.Ljungvall, A.Lopez-Martens, R.Lozeva, P.Nieminen, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Sorri, B.Sulignano, Ch.Theisen, J.Uusitalo, M.Venhart

Shell-Structure and Pairing Interaction in Superheavy Nuclei: Rotational Properties of the Z=104 Nucleus 256Rf

NUCLEAR REACTIONS 208Pb(50Ti, 2n)256Rf, E=242 MeV; measured reaction products, Eγ, Iγ; deduced σ, T1/2, rotational band structure, energies, J, π, moments of inertia. Comparison with available data, systematics.

doi: 10.1103/PhysRevLett.109.012501
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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, T1/2, 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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2012MI27      Science 337, 1207 (2012)

E.Minaya-Ramirez, D.Ackermann, K.Blaum, M.Block, C.Droese, C.E.Dullmann, M.Dworschak, M.Eibach, S.Eliseev, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, G.Marx, M.Mazzocco, D.Nesterenko, Y.N.Novikov, W.R.Plass, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, C.Weber

Direct Mapping of Nuclear Shell Effects in the Heaviest Elements

ATOMIC MASSES 252,253,254,255No, 255,256Lr; measured time-of-flight ion-cyclotron-resonance; deduced frequency ratios, mass excess. Comparison with theoretical calculations, SHIPTRAP results.

doi: 10.1126/science.1225636
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2012PA35      Eur.Phys.J. A 48, 134 (2012)

E.Parr, R.-D.Herzberg, S.Antalic, P.T.Greenlees, F.P.Hessberger, S.Ketelhut, D.Rostron

New approaches to assign configurations using low-statistic γ-ray spectra

NUCLEAR STRUCTURE 250Fm, 252,254No; calculated g-factors, B(E2), B(M1), conversion coefficient, γ spectra including X-ray region, branching ratios, 254No isomer Kπ assignment. Compared with available data.

doi: 10.1140/epja/i2012-12134-2
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2012PI05      Phys.Rev. C 85, 041301 (2012)

J.Piot, B.J.-P.Gall, O.Dorvaux, P.T.Greenlees, N.Rowley, L.L.Andersson, D.M.Cox, F.Dechery, T.Grahn, K.Hauschild, G.Henning, A.Herzan, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, T.-L.Khoo, M.Leino, J.Ljungvall, A.Lopez-Martens, P.Nieminen, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, P.Rahkila, S.Rinta-Antila, J.Rubert, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Sorri, B.Sulignano, J.Uusitalo

In-beam spectroscopy with intense ion beams: Evidence for a rotational structure in 246Fm

NUCLEAR REACTIONS 208Pb(40Ar, 2n), E=186 MeV; measured Eγ, Iγ, γγ-coin, Eα, α(recoil) correlations, σ using JUROGAM-II array, RITU separator, and GREAT spectrometer at JYFL facility. Recoil-decay tagging technique. 246Fm; deduced levels, J, π, rotational band, dynamic moment of inertia plot. Comparison with ground-state bands in 248,250,252,254,256Fm.

RADIOACTIVITY 246Fm(α); measured Eα, half-life.

doi: 10.1103/PhysRevC.85.041301
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2012SU22      Phys.Rev. C 86, 044318 (2012)

B.Sulignano, Ch.Theisen, J.-P.Delaroche, M.Girod, J.Ljungvall, D.Ackermann, S.Antalic, O.Dorvaux, A.Drouart, B.Gall, A.Gorgen, P.T.Greenlees, K.Hauschild, R.-D.Herzberg, F.P.Hessberger, U.Jakobsson, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, W.Korten, M.Leino, A.Lopez-Martens, M.Nyman, A.Obertelli, J.Pakarinen, P.Papadakis, E.Parr, P.Peura, J.Piot, P.Rahkila, D.Rostron, P.Ruotsalainen, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, M.Venhart, M.Zielinska

Investigation of high-K states in 252No

NUCLEAR REACTIONS 206Pb(48Ca, 2n), E=218 MeV; measured Eγ, Iγ, γγ-, γ(ce)-coin, E(ce), I(ce), Eα, isomer half-life using RITU separator, GREAT spectrometer and JUROGAM array at Jyvaskyla facility. 252No; deduced levels, J, π, rotational bands, configuration, high-K states, hindrance factors. 250Fm, 252No; systematics of dynamic moments of inertia and proton pairing energies. Comparison with Hartree-Fock-Bogoliubov (HFB) mean-field calculations.

RADIOACTIVITY 252No(α), (SF); measured Eα, Iα, (evaporation residues)α correlations, half-life, branching ratios for decay modes. 244Cf, 248,250Fm, 253,254No(α); measured α spectrum.

doi: 10.1103/PhysRevC.86.044318
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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 T1/2, 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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2011HA08      Phys.Rev.Lett. 106, 122501 (2011)

E.Haettner, D.Ackermann, G.Audi, K.Blaum, M.Block, S.Eliseev, T.Fleckenstein, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, S.Rahaman, T.Rauscher, D.Rodriguez, H.Schatz, C.Scheidenberger, L.Schweikhard, B.Sun, P.G.Thirolf, G.Vorobjev, M.Wang, C.Weber

Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis

ATOMIC MASSES 81Rb, 80,81,84Sr, 86Zr, 85Nb, 85,86,87Mo, 87Tc; measured frequency ratios; deduced masses, proton separation energies, possible limitations for rp astrophysical process. Comparison with AME03, Penning trap mass measurement.

doi: 10.1103/PhysRevLett.106.122501
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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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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, T1/2 for high-K states; deduced T1/2, spontaneous fission T1/2, 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 179Tlm

RADIOACTIVITY 179Tl, 175Au, 179Pb(α) [from 144Sm(40Ca, 5n), E=232 MeV]; measured Eα, Iα; deduced T1/2, 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, T1/2. 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, T1/2. Comparison with other data and calculations.

doi: 10.1140/epja/i2009-10896-0
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2010BL03      Hyperfine Interactions 196, 225 (2010)

M.Block, D.Ackermann, K.Blaum, C.Droese, M.Dworschak, M.Eibach, S.Eliseev, T.Fleckenstein, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, A.Popeko, S.Rahaman, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.K.Vorobyev, C.Weber

Penning trap mass measurements of transfermium elements with SHIPTRAP

ATOMIC MASSES 252,253,254No; measured cyclotron resonance curves; deduced masses.

doi: 10.1007/s10751-010-0161-z
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2010BL04      Nature(London) 463, 785 (2010)

M.Block, D.Ackermann, K.Blaum, C.Droese, M.Dworschak, S.Eliseev, T.Fleckenstein, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, A.Popeko, S.Rahaman, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.K.Vorobyev, C.Weber

Direct mass measurements above uranium bridge the gap to the island of stability

ATOMIC MASSES 252,253,254No; measured masses by Penning-trap method at GSI, using 133Cs as standard.

doi: 10.1038/nature08774
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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, T1/2.

RADIOACTIVITY 288,289Fl, 285Cn(α), 281Ds(α), 284Cn, 281Ds, 277Hs(SF); measured reaction products, Eα, Iα; deduced α-decay chains, T1/2.

doi: 10.1103/PhysRevLett.104.252701
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2010DW01      Phys.Rev. C 81, 064312 (2010)

M.Dworschak, M.Block, D.Ackermann, G.Audi, K.Blaum, C.Droese, S.Eliseev, T.Fleckenstein, E.Haettner, F.Herfurth, F.P.Hessberger, S.Hofmann, J.Ketelaer, J.Ketter, H.-J.Kluge, G.Marx, M.Mazzocco, Yu.N.Novikov, W.R.Plass, A.Popeko, S.Rahaman, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.K.Vorobyev, M.Wang, C.Weber

Penning trap mass measurements on nobelium isotopes

ATOMIC MASSES 252,253,254No; measured cyclotron frequencies using SHIPTRAP Penning-trap system; deduced mean frequency ratios and mass excesses. Comparison with AME2003 and re-evaluation.

ATOMIC MASSES 232U, 236,238Pu, 240,241,242Cm, 244,245,246Cf, 248,249,250Fm, 252,253,254No, 256,257,258Rf, 260,261,262Sg, 264,265,266Hs, 268,269,270Ds; compiled and evaluated mass excesses.

NUCLEAR REACTIONS 206,207,208Pb(48Ca, 2n)252No/253No/254No, E=4.55 MeV/nucleon; measured production σ.

doi: 10.1103/PhysRevC.81.064312
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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 T1/2, 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, T1/2, 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, T1/2, 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 T1/2, 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). 208,209,210,212Th deduced α decay widths, T1/2, 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, 240Cf

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. 237,238,239,240,241Cf deduced σ.

RADIOACTIVITY 237,238,240Cf(SF), (α); measured Eα, Iα, delayed αα-coin, TKE; deduced spontaneous fission T1/2. 237,240Cf deduced mass excess. 238,240Cf deduced α-decay T1/2. 233,236Cm(α), (EC)[from Cf α decay]; measured Eα, Iα, Iβ; deduced α-decay T1/2, α-branching. 236Cm deduced mass excess, spontaneous fission T1/2. 229Pu(α); measured Eα, Iα(t); deduced T1/2.

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, 274,275,276,277Sg, 273,275,276Rg, 278,279,280,281Cn; 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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