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2023MU03      Eur.Phys.J. A 59, 21 (2023)

G.Munzenberg, M.Gupta, H.M.Devaraja, Y.K.Gambhir, S.Heinz, S.Hofmann

Heavy and superheavy elements: next generation experiments, ideas and considerations

doi: 10.1140/epja/s10050-023-00939-3
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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.


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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2020HO22      Pure Appl.Chem. 92, 1387 (2020)

S.Hofmann, S.N.Dmitriev, C.Fahlander, J.M.Gates, J.B.Roberto, H.Sakai

On the discovery of new elements (IUPAC/IUPAP Report)

COMPILATION Z=101-118; compiled the discoveries of new elements.

RADIOACTIVITY 293119, 289Ts, 285Mc, 281Nh, 277Rg, 273Mt, 269Bh, 261Lr(α), 295119, 291Ts, 287Mc, 283Nh, 279Rg, 275Mt, 271Bh, 267Db(α), 297119, 293Ts, 289Mc, 285Nh, 281Rg, 299119, 295Ts, 291Mc, 287Nh, 283Rg, 279Mt, 294119, 290Ts, 286Mc, 282Nh, 278Rg, 274Mt, 270Bh, 266Db(α), 296119, 292Ts, 288Mc, 284Nh, 280Rg, 276Mt, 272Bh, 268Db(α), 298119, 294Ts, 290Mc, 286Nh, 282Rg, 278Mt, 274Bh, 270Db(α), 300119, 296Ts, 292Mc, 288Nh, 284Rg, 280Mt, 276Bh(α), 295120, 291Og, 287Lv, 283Fl, 279Cn, 275Ds, 271Hs, 267Sg(α), 297120, 293Og, 289Lv, 285Fl, 281Cn, 277Ds, 273Hs, 269Sg, 265Rf(α), 299120, 295Og, 291Lv, 287Fl, 283Cn, 279Ds(α), 299120, 295Og, 291Lv, 287Fl, 283Cn, 279Ds(α), 296120, 292Og, 288Lv, 284Fl(α), 298120, 294Og, 290Lv, 286Fl, 282Cn(α), 300120, 296Og, 292Lv, 288Fl, 284Cn(α); compiled expected decay chains of isotopes of elements 119 and 120 which could be produced in reactions with beams of the most neutron rich stable isotopes of elements from calcium to manganese and targets of 244Pu, 243Am, 248Cm, 249Bk, 249Cf, 250Cf, 251Cf, and 254Es.

doi: 10.1515/pac-2020-2926
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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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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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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.


2019HO12      Radiochim.Acta 107, 879 (2019)

S.Hofmann

Synthesis and properties of isotopes of the transactinides

doi: 10.1515/ract-2019-3104
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2019XI06      Phys.Rev. C 100, 034315 (2019)

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

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

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

doi: 10.1103/PhysRevC.100.034315
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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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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23443.


2017BE05      Eur.Phys.J. A 53, 32 (2017)

O.Beliuskina, A.O.Strekalovsky, A.A.Aleksandrov, I.A.Aleksandrova, H.M.Devaraja, C.Heinz, S.Heinz, S.Hofmann, S.Ilich, N.Imai, D.V.Kamanin, M.Kis, G.N.Knyazheva, C.Kozhuharov, E.A.Kuznetsova, J.Maurer, G.V.Mishinsky, M.Pomorski, Yu.V.Pyatkov, O.V.Strekalovsky, M.Trager, V.E.Zhuchko

Pulse-height defect in single-crystal CVD diamond detectors

doi: 10.1140/epja/i2017-12223-8
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2017KA66      J.Phys.Soc.Jpn. 86, 034201 (2017)

D.Kaji, K.Morita, K.Morimoto, H.Haba, M.Asai, K.Fujita, Z.Gan, H.Geissel, H.Hasebe, S.Hofmann, M.H.Huang, Y.Komori, L.Ma, J.Maurer, M.Murakami, M.Takeyama, F.Tokanai, T.Tanaka, Y.Wakabayashi, T.Yamaguchi, S.Yamaki, A.Yoshida

Study of the Reaction 48Ca + 248Cm → 296Lv* at RIKEN-GARIS

RADIOACTIVITY 292Lv, 288Fl, 284Cn, 293Lv, 289Fl, 285Cn, 294Lv, 290Fl(α) [from 248Cm(48Ca, X)296Lv, E=261.6, 258.0 MeV]; measured decay products, Eα, Iα; deduced decay branches and ratios.

NUCLEAR REACTIONS 248Cm(48Ca, X)296Lv, E=261.6, 258.0 MeV; measured reaction products; deduced σ. Comparison with available data.

doi: 10.7566/jpsj.86.034201
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2538.


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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Data from this article have been entered in the XUNDL database. For more information, click here.


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

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

Remarks on the fission barriers of super-heavy nuclei

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

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

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

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

doi: 10.1140/epja/i2016-16180-4
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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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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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2014AN10      Phys.Rev. C 90, 044312 (2014)

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

α decay of 176Au

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

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

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

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

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

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

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

Decay of 201-203Ra and 200-202Fr

RADIOACTIVITY 200,201,201m,202,202mFr, 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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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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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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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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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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2012HO03      Acta Phys.Pol. B43, 179 (2012)

S.Hofmann

Physics Experiments on Superheavy Nuclei at the GSI SHIP

doi: 10.5506/APhysPolB.43.179
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2012HO04      Rom.J.Phys. 57, 214 (2012)

S.Hofmann

Study of Superheavy Nuclei at Ship


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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2012NI12      Phys.Rev. C 86, 034608 (2012)

K.Nishio, S.Mitsuoka, I.Nishinaka, H.Makii, Y.Wakabayashi, H.Ikezoe, K.Hirose, T.Ohtsuki, Y.Aritomo, S.Hofmann

Fusion probabilities in the reactions 40, 48Ca+238U at energies around the Coulomb barrier

NUCLEAR REACTIONS 238U(40Ca, X), (48Ca, X), E(cm)=180-248 MeV; measured fission fragment spectra, (fragment)(fragment)-coin, σ(θ), full momentum transfer fission σ, fission fragment σ and mass distribution, total kinetic energy (TKE); deduced fusion probabilities. Comparison with calculations using fluctuation-dissipation model using Langevin equations. Comparison with previous experimental studies.

doi: 10.1103/PhysRevC.86.034608
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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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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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2011HO10      Radiochim.Acta 99, 405 (2011)

S.Hofmann

Synthesis of superheavy elements by cold fusion

doi: 10.1524/ract.2011.1854
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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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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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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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2010HO06      Int.J.Mod.Phys. E19, 483 (2010)

S.Hofmann

Experiments on superheavy elements

doi: 10.1142/S0218301310014819
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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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2010NI18      Phys.Rev. C 82, 044604 (2010)

K.Nishio, H.Ikezoe, I.Nishinaka, S.Mitsuoka, K.Hirose, T.Ohtsuki, Y.Watanabe, Y.Aritomo, S.Hofmann

Evidence for quasifission in the sub-barrier reaction of 30Si+238U

NUCLEAR REACTIONS 238U(30Si, X), E=140.8, 145.3, 150.9, 156.5, 162.2, 167.8, 173.4, 179.0, 190.3 MeV; measured distribution for folding angle of fission fragments, σ for the full momentum transfer (FMT) fission, σ for evaporation residues of 263,264,265Sg, A=50-250 fragment mass distributions for full momentum transfer (FMT) fissions. Comparison with Langevin equation model and statistical model calculations.

doi: 10.1103/PhysRevC.82.044604
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2010ST14      Eur.Phys.J. A 45, 275 (2010)

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

Alpha-gamma decay studies of 261Sg and 257Rf

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

RADIOACTIVITY 255Fm, 257No, 257Rf, 261Sg(α); measured Eα, Iα, Eγ, Iγ, γγ-coin, αγ-coin, E(K X-rays). 251Cf, 253Fm, 257Rf deduced levels, J, π; 257Rf isomer deduced T1/2, decay scheme.

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

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

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

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


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

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

α decay of 194At

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

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

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

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

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

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

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

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

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

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

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

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

α decay of 180, 181Pb

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

doi: 10.1103/PhysRevC.80.054322
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2009GU06      Int.J.Mod.Phys. E18, 601 (2009)

R.K.Gupta, Niyti, M.Manhas, S.Hofmann, W.Greiner

Role of static deformation and compact orientation of target nucleus in measured fusion, fusion-fission and capture cross-sections of 244Pu + 48Ca reaction

NUCLEAR REACTIONS 244Pu(48Ca, X), E≈ 31-53 MeV; calculated the fusion evaporation, fusion-fusion and quasi-fission excitation functions, neutron evaporation σ. Dynamical cluster decay model.

doi: 10.1142/S0218301309012744
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2009HE20      Eur.Phys.J. A 41, 145 (2009)

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

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

NUCLEAR REACTIONS 207Pb(54Cr, n), (54Cr, 2n), 208Pb(58Fe, n), (54Cr, 2n), 209Bi(54Cr, n), (50Ti, n), (50Ti, 2n), (48Ca, 4n), E not given; measured Eα, Iα, Eγ, (fragment)α-coin, αψ-coin, σ; deduced decay chain properties, T1/2, levels, J, π. Comparison with other data and calculations.

RADIOACTIVITY 249Md, 253Lr, 257,258Db, 259,260Sg, 262Bh, 265Hs(α), (SF), (EC); measured Eα, Iα, T1/2; deduced levels, J, π. Analysis of decay chains and production routes. Comparison with other data and calculations.

doi: 10.1140/epja/i2009-10826-2
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2009NA01      Phys.Rev. C 79, 024606 (2009)

A.K.Nasirov, G.Giardina, G.Mandaglio, M.Manganaro, F.Hanappe, S.Heinz, S.Hofmann, A.I.Muminov, W.Scheid

Quasifission and fusion-fission in reactions with massive nuclei: Comparison of reactions leading to the Z = 120 element

NUCLEAR REACTIONS 144Sm(48Ca, xn), E=130-180 MeV; 154Sm(48Ca, xn), $E=125-190 MeV; 186W(16O, xn), E not given; 238U(64Ni, xn), E=262-284 MeV; 244Pu(58Fe, xn), E=246-271 MeV; 248Cm(54Cr, xn), E=230-260 MeV; 249Cf(48Ca, xn), E=190-230 MeV; calculated excitation functions, cross sections and yields for evaporation residues, fusion-fission and quasifission fragments using dinuclear system and advanced statistical model. Comparison with experimental data. Discussed suitable reactions for the formation of Z=120 element.

doi: 10.1103/PhysRevC.79.024606
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2009NA38      Bull.Rus.Acad.Sci.Phys. 73, 1476 (2009); Izv.Akad.Nauk RAS, Ser.Fiz. 73, 1571 (2009)

A.K.Nasirov, G.Fazio, S.Hofmann, G.Giardina, A.I.Muminov, G.Mandaglio, M.Manganaro, W.Scheid

Comparison of the characteristics of the fusion-fission and quasifission products in reactions with heavy ions

NUCLEAR REACTIONS 154Sm(48Ca, X), 248Cm(54Cr, X), 244Pu(58Fe, X), 238U(64Ni, X) E(cm)<280 MeV; analyzed fusion-fission product mass distribution, yields, σ for heavy ion reactions;calculated σ; deduced large value of σ of evaporation residues in the 248Cm + 54Cr reaction.

doi: 10.3103/S1062873809110112
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2009PA30      Int.J.Mod.Phys. E18, 1071 (2009)

A.Parkhomenko, S.Hofmann, A.Sobiczewski

Structure effects in the decay of superheavy nuclei

RADIOACTIVITY 269Ds(α); calculated level properties of α decay chain using macroscopic-microscopic approach. Derived characteristic quantities.

doi: 10.1142/S0218301309013270
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2008AN16      Eur.Phys.J. A 38, 219 (2008)

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

Decay studies of neutron-deficient lawrencium isotopes

RADIOACTIVITY 250,251Md, 254,255,256Lr(EC), (α) [from 209Bi(48Ca, xn), E=214-244 MeV and subsequent decays]; measured Eα, Iα, conversion electrons, Eγ, Iγ, γa-, (ce)a-coin, T1/2. 250Md; deduced levels, J, π, T1/2.

NUCLEAR REACTIONS 209Bi(48Ca, xn)255Lr/256Lr, E=214, 218 MeV; measured σ.

doi: 10.1140/epja/i2008-10665-7
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2008HE16      Eur.Phys.J. A 38, 227 (2008)

S.Heinz, V.Comas, F.P.Hessberger, S.Hofmann, D.Ackermann, H.G.Burkhard, Z.Gan, J.Heredia, J.Khuyagbaatar, B.Kindler, B.Lommel, R.Mann, J.Maurer, K.Nishio, B.Sulignano

Di-nuclear systems studied with the velocity filter SHIP

NUCLEAR REACTIONS 206Pb(25Mg, X), E=5.9, 8.7 MeV/nucleon; 207Pb(64Ni, X), E=5.9 MeV/nucleon; measured Eα, Iα, product velocity distributions; deduced reaction mechanism features.

doi: 10.1140/epja/i2008-10671-9
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2008KH10      Eur.Phys.J. A 37, 177 (2008)

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

Spontaneous fission of neutron-deficient fermium isotopes and the new nucleus 241Fm

NUCLEAR REACTIONS 207Pb(40Ar, 3n), E=193 MeV; 208Pb(40Ar, 4n), E=201 MeV; 206Pb(40Ar, xn)242Fm/243Fm/244Fm, E=185-204 MeV; 204Pb(40Ar, 3n), E=187-206 MeV; 204Pb(40Ar, 2n), E=187 MeV; measured σ, Eγ, Iγ, Eα, αγ-, (recoil)γ-coin following residual nucleus decay. Non observance of 242Fm nor K-isomers in 241,242,243,244Fm. Comparison with HIVAP calculations.

RADIOACTIVITY 242Fm(α), (SF), 241,243,244Fm(EC), (α), (SF) [from 204,206,207,208Pb(40Ar, X)]; measured Eα, Eγ, αγ-coin, T1/2, branching ratio, total kinetic energy, SF hindrance factors. Non observance of 242Fm. Comparison with T1/2 calculations. 236,237,238,239Fm(SF); calculated T1/2.

doi: 10.1140/epja/i2008-10608-4
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2008KI10      Nucl.Instrum.Methods Phys.Res. A590, 126 (2008)

B.Kindler, D.Ackermann, W.Hartmann, F.P.Hessberger, S.Hofmann, A.Hubner, B.Lommel, R.Mann, J.Steiner

Uranium fluoride and metallic uranium as target materials for heavy-element experiments at SHIP

doi: 10.1016/j.nima.2008.02.031
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2008NI07      Phys.Rev. C 77, 064607 (2008)

K.Nishio, H.Ikezoe, S.Mitsuoka, I.Nishinaka, Y.Nagame, Y.Watanabe, T.Ohtsuki, K.Hirose, S.Hofmann

Effects of nuclear orientation on the mass distribution of fission fragments in the reaction of 36S+238U

NUCLEAR REACTIONS 238U(36S, X), E=163-208 MeV; measured emission angles, σ, mass distributions of fission products. Comparison with coupled channels calculations.

doi: 10.1103/PhysRevC.77.064607
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2008RA03      Phys.Rev.Lett. 100, 012501 (2008)

C.Rauth, D.Ackermann, K.Blaum, M.Block, A.Chaudhuri, Z.Di, S.Eliseev, R.Ferrer, D.Habs, F.Herfurth, F.P.Hessberger, S.Hofmann, H.-J.Kluge, G.Maero, A.Martin, G.Marx, M.Mukherjee, J.B.Neumayr, W.R.Plass, S.Rahaman, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.Vorobjev, C.Weber

First Penning Trap Mass Measurements beyond the Proton Drip Line

ATOMIC MASSES 144,145,146,147Ho, 147,148Tm; measured masses using the SHIPTRAP penning trap mass spectrometer.

doi: 10.1103/PhysRevLett.100.012501
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2008TH05      Eur.Phys.J. A 36, 227 (2008)

C.Thierfelder, P.Schwerdtfeger, F.P.Hessberger, S.Hofmann

Dirac-Hartree-Fock studies of X-ray transitions in meitnerium

ATOMIC PHYSICS 59Co, 103Rh, 193Ir, 243Cf, 243Es, 251,253Fm, 253Md, 253No, 255Lr, 257Rf, 268Mt; Z=106-112; calculated E(K X-ray) using a Dirac-Hartree-Fock model. Comparison with data.

doi: 10.1140/epja/i2008-10584-7
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2008WE10      Phys.Rev. C 78, 054310 (2008)

C.Weber, V.-V.Elomaa, R.Ferrer, C.Frohlich, D.Ackermann, J.Aysto, G.Audi, L.Batist, K.Blaum, M.Block, A.Chaudhuri, M.Dworschak, S.Eliseev, T.Eronen, U.Hager, J.Hakala, F.Herfurth, F.P.Hessberger, S.Hofmann, A.Jokinen, A.Kankainen, H.-J.Kluge, K.Langanke, A.Martin, G.Martinez-Pinedo, M.Mazzocco, I.D.Moore, J.B.Neumayr, Yu.N.Novikov, H.Penttila, W.R.Plass, A.V.Popov, S.Rahaman, T.Rauscher, C.Rauth, J.Rissanen, D.Rodriguez, A.Saastamoinen, C.Scheidenberger, L.Schweikhard, D.M.Seliverstov, T.Sonoda, F.-K.Thielemann, P.G.Thirolf, G.K.Vorobjev

Mass measurements in the vicinity of the r p-process and the ν p-process paths with the Penning trap facilities JYFLTRAP and SHIPTRAP

ATOMIC MASSES 84Y, 87Zr, 88,89Mo, 88,89,90,91,92Tc, 90,91,92,93Ru, 92,93,94,95Rh, 94,95,95m,96Pd; measured masses. Comparison with evaluated data.

doi: 10.1103/PhysRevC.78.054310
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2007AN19      Acta Phys.Pol. B38, 1557 (2007)

S.Antalic, A.N.Andreyev, D.Ackermann, L.Bianco, D.Cullen, I.Darby, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, B.Kindler, I.Kojouharov, A.-P.Leppanen, S.R.Lesher, B.Lommel, R.Mann, G.Munzenberg, K.Nishio, R.D.Page, J.Pakarinen, J.J.Ressler, S.Saro, B.Streicher, B.Sulignano, J.Thomson, P.Van Duppen, M.Venhart, D.Wiseman, R.Wyss

The New Isotopes in Po-Rn Region

NUCLEAR REACTIONS 144Sm(46Ti, 3n)187Po, E=224 MeV; 144Sm(52Cr, X)193,194Rn, E=232, 252 meV; measured Eα. 187Po, 193,194Rn deduced levels.


2007BA58      Eur.Phys.J. D 45, 99 (2007)

H.Backe, P.Kunz, W.Lauth, A.Dretzke, R.Horn, T.Kolb, M.Laatiaoui, M.Sewtz, D.Ackermann, M.Block, F.Herfurth, F.P.Hessberger, S.Hofmann, R.Mann

Towards optical spectroscopy of the element nobelium (Z = 102) in a buffer gas cell

doi: 10.1140/epjd/e2007-00198-1
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2007BL16      Eur.Phys.J. D 45, 39 (2007)

M.Block, D.Ackermann, K.Blaum, A.Chaudhuri, Z.Di, S.Eliseev, R.Ferrer, D.Habs, F.Herfurth, F.P.Hessberger, S.Hofmann, H.-J.Kluge, G.Maero, A.Martin, G.Marx, M.Mazzocco, M.Mukherjee, J.B.Neumayr, W.R.Plass, W.Quint, S.Rahaman, C.Rauth, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.Vorobjev, C.Weber

Towards direct mass measurements of nobelium at SHIPTRAP

doi: 10.1140/epjd/e2007-00189-2
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2007HO14      Int.J.Mod.Phys. E16, 937 (2007)

S.Hofmann, D.Ackermann, S.Antalic, H.G.Burkhard, V.F.Comas, R.Dressler, Z.Gan, S.Heinz, J.A.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, G.Munzenberg, K.Nishio, A.G.Popeko, S.Saro, H.J.Schott, B.Streicher, B.Sulignano, J.Uusitalo, A.V.Yeremin

Studies of superheavy elements at SHIP

NUCLEAR REACTIONS 238U(48Ca, X), E=233.3-239.3 MeV; measured Eα from spontaneous fission.

doi: 10.1142/S021830130700640X
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2007HO18      Eur.Phys.J. A 32, 251 (2007)

S.Hofmann, D.Ackermann, S.Antalic, H.G.Burkhard, V.F.Comas, R.Dressler, Z.Gan, S.Heinz, J.A.Heredia, F.P.Hessberger, J.Khuyagbaatar, B.Kindler, I.Kojouharov, P.Kuusiniemi, M.Leino, B.Lommel, R.Mann, G.Munzenberg, K.Nishio, A.G.Popeko, S.Saro, H.J.Schott, B.Streicher, B.Sulignano, J.Uusitalo, M.Venhart, A.V.Yeremin

The reaction 48Ca + 238U → 286112* studied at the GSI-SHIP

NUCLEAR REACTIONS 238U(48Ca, X), E=233.3-239.3 MeV; measured σ, Eα, (recoil)α-coin following residual nucleus decay; deduced evidence for 286Cn.

RADIOACTIVITY 283Cn(α), (SF) [from 238U(48Ca, X)]; measured Eα, (recoil)α-coin, T1/2.

doi: 10.1140/epja/i2007-10373-x
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0895. Data from this article have been entered in the XUNDL database. For more information, click here.


2007HO24      J.Nucl.Radiochem.Sci. 8, 73 (2007)

S.Hofmann, H.Ikezoe, F.P.Hessberger, D.Ackermann, S.Antalic, V.F.Comas, Z.Gan, S.Heinz, J.A.Heredia, J.Khuyagbaatar, B.Kindler, I.Kojouharov, P.Kuusiniemi, B.Lommel, M.Mazzocco, S.Mitsuoka, Y.Nagame, T.Ohtsuki, A.G.Popeko, S.Saro, H.J.Schott, B.Sulignano, A.Svirikhin, K.Tsukada, K.Tsuruta, A.V.Yeremin

Measurement of Evaporation Residue and Fission Cross Sections of the Reaction 30Si + 238U at Subbarrier Energies

NUCLEAR REACTIONS 238U(30Si, X), E=140-183 MeV; measured fission fragment energy and mass distributions, fission cross sections. Compared results to model calculations.


2007KH22      Eur.Phys.J. A 34, 355 (2007)

J.Khuyagbaatar, S.Hofmann, F.P.Hessberger, D.Ackermann, S.Antalic, H.G.Burkhard, S.Heinz, B.Kindler, A.F.Lisetskiy, B.Lommel, R.Mann, K.Nishio, H.J.Schott, B.Sulignano

Isomeric states in 214Th and 213Th

NUCLEAR REACTIONS 164Dy(54Cr, X)213Th/214Th, E=246, 258 MeV; measured σ, Eγ, Iγ, αγ-coin following residual nucleus decay. 213,214Th deduced levels, J, π, T1/2.

NUCLEAR STRUCTURE 214,216Th, 212,214Ra, 210,212Rn, 208,210Po; analyzed levels, J, π, B(E2) using shell model.

doi: 10.1140/epja/i2007-10512-5
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1647. Data from this article have been entered in the XUNDL database. For more information, click here.


2007MA92      Eur.Phys.J. A 34, 341 (2007)

A.Martin, D.Ackermann, G.Audi, K.Blaum, M.Block, A.Chaudhuri, Z.Di, S.Eliseev, R.Ferrer, D.Habs, F.Herfurth, F.P.Hessberger, S.Hofmann, H.-J.Kluge, M.Mazzocco, M.Mukherjee, J.B.Neumayr, Yu.Novikov, W.Plass, S.Rahaman, C.Rauth, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, G.Vorobjev, C.Weber

Mass measurements of neutron-deficient radionuclides near the end-point of the rp-process with SHIPTRAP

ATOMIC MASSES 99,101,103Ag, 101,102,103,104Cd, 102,103,104,105In, 105,106Sn, 107,109,111Sb, 109,110,111,112Te, 111,112,113I, 113Xe; measured and evaluated masses using the SHIPTRAP Penning trap mass spectrometer. 104Sn, 105Sb, 108Te, 109I, 112Xe, 113Cs; evaluated masses.

NUCLEAR STRUCTURE 102,103,104,105In, 104,105,106Sn, 105,106,107Sb, 109I; deduced proton separation energies from mass measurements using the SHIPTRAP facility.

doi: 10.1140/epja/i2007-10520-5
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2007RA37      Eur.Phys.J. Special Topics 150, 329 (2007)

C.Rauth, D.Ackermann, G.Audi, M.Block, A.Chaudhuri, S.Eliseev, F.Herfurth, F.P.Hessberger, S.Hofmann, H.-J.Kluge, A.Martin, G.Marx, M.Mukherjee, J.B.Neumayr, W.R.Plass, S.Rahaman, D.Rodriguez, L.Schweikhard, P.G.Thirolf, G.Vorobjev, C.Weber

Direct mass measurements around A=146 at SHIPTRAP

ATOMIC MASSES 143,147Tb, 143,144,145,146,147,148Dy, 144,145,146,147,148Ho, 146,147,148Er, 147,148Tm; measured masses using the SHIPTRAP penning trap mass spectrometer. Compared results to previous results.

doi: 10.1140/epjst/e2007-00339-8
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2007ST12      Acta Phys.Pol. B38, 1561 (2007)

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

Alpha-Gamma Decay Studies of 261Sg

NUCLEAR REACTIONS 208Pb(54Cr, X)261sg, e=4.70-5.17 MeV/nucleon; measured Eγ, EX, Eα, αγ-coinc. 261Sg deduced levels, J, π.


2007SU19      Eur.Phys.J. A 33, 327 (2007)

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

Identification of a K isomer in 252No

NUCLEAR REACTIONS 206Pb(48Ca, 2n)252No, E(cm)=173.6-177 MeV; measured Eγ, Iγ, γγ-coinc. 252No deduced levels, J, π.

doi: 10.1140/epja/i2007-10469-3
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006AN04      Phys.Rev. C 73, 024317 (2006)

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

α-decay spectroscopy of the new isotope 192At

NUCLEAR REACTIONS 144Sm(51V, X), E=230 MeV; measured Eγ, Eα, (recoil)α-, αα-, αγ-coin following residual nucleus decay; deduced evidence for 192At.

RADIOACTIVITY 192,192mAt(α) [from 144Sm(51V, 3n)]; measured Eα, Eγ, αγ-coin, T1/2; deduced isomeric states energies, configurations.

doi: 10.1103/PhysRevC.73.024317
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006AN11      Phys.Rev. C 73, 044324 (2006)

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

α-decay of the new isotope 187Po: Probing prolate structures beyond the neutron mid-shell at N = 104

NUCLEAR REACTIONS 144Sm(46Ti, 3n), (46Ti, 2np), E=224 MeV; measured Eγ, Eα, (recoil)α-coin following residual nucleus decay; deduced production σ. Recoil velocity filter.

RADIOACTIVITY 187Po, 187,187mBi, 183mTl(α) [from 144Sm(46Ti, xnyp) and subsequent decay]; measured Eγ, Eα, T1/2; deduced hindrance factors. 187Po, 183Pb, 187Bi, 183Tl deduced levels, J, π, configurations, deformation.

doi: 10.1103/PhysRevC.73.044324
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006AN13      Acta Phys.Slovaca 56, 87 (2006)

S.Antalic, B.Streicher, F.P.Hessberger, S.Hofmann, D.Ackermann, S.Saro, B.Sulignano

Synthesis and properties of the heaviest elements

NUCLEAR REACTIONS 209Bi(40Ar, xn), (48Ca, xn), E ≈ 5 MeV/nucleon; measured delayed Eγ, Eα, αγ-coin; deduced evidence for 246,247Md, 255Lr. 208Pb(54Cr, n), (54Cr, 2n), E* ≈ 12-35 MeV; measured excitation functions.

RADIOACTIVITY 247,251Md, 243Es, 255Lr, 261Sg(α); measured Eγ, Eα, T1/2. 257Rf, 251Md, 243,247Es deduced levels, J, π.


2006AN36      Phys.Rev.C 74, 064303 (2006)

A.N.Andreyev, S.Antalic, M.Huyse, P.Van Duppen, D.Ackermann, L.Bianco, D.M.Cullen, I.G.Darby, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, I.Kojouharov, B.Kindler, A.-P.Leppanen, B.Lommel, R.Mann, G.Munzenberg, J.Pakarinen, R.D.Page, J.J.Ressler, S.Saro, B.Streicher, B.Sulignano, J.Thomson, R.Wyss

α decay of the new isotopes 193, 194Rn

RADIOACTIVITY 193,194Rn(α) [from 144Sm(52Cr, xn)]; measured Eα, Iα, T1/2; deduced deformation effects.

NUCLEAR REACTIONS 144Sm(52Cr, 2n), (52Cr, 3n), E=231-252 MeV; measured production σ. Velocity filter.

doi: 10.1103/PhysRevC.74.064303
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006HE20      Eur.Phys.J. A 29, 165 (2006)

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

Alpha-gamma decay studies of 255No

RADIOACTIVITY 255No(α) [from 208Pb(48Ca, n), 209Bi(48Ca, 2n), 238U(22Ne, 5n)]; measured Eα, Eγ, αγ-coin, T1/2. 251Fm deduced levels, J, π. Level systematics in neighboring nuclides discussed.

doi: 10.1140/epja/i2006-10083-y
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006HE27      Eur.Phys.J. A 30, 561 (2006)

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

Alpha-gamma decay studies of 255Rf, 251No and 247Fm

RADIOACTIVITY 255Rf, 251No, 247Fm(α) [from 207Pb(50Ti, 2n), 206Pb(48Ca, 3n), and subsequent decay]; measured Eγ, Eα, αγ-, γγ-coin. 243Cf, 247Fm, 251No deduced levels, J, π, ICC, isomeric states features. Velocity filter.

doi: 10.1140/epja/i2006-10137-2
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006HO29      J.Nucl.Radiochem.Sci. 7, R25 (2006)

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

Study of Superheavy Elements at the GSI-SHIP

NUCLEAR REACTIONS 238U(48Ca, X)286Cn, E=34.5 MeV; measured reaction products; deduced σ, T1/2. Comparison with available data. SHIP separator.

doi: 10.14494/jnrs2000.7.R25
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2006KU26      Eur.Phys.J. A 30, 551 (2006)

P.Kuusiniemi, F.P.Hessberger, D.Ackermann, S.Antalic, S.Hofmann, K.Nishio, B.Sulignano, I.Kojouharov, R.Mann

Studies of 213g, mRa and 214g, mRa by α and γ decay

RADIOACTIVITY 213,213m,214,214mRa(α) [from 170Er(48Ca, xn), (50Ti, 3n) and subsequent decay]; measured Eγ, Eα, αγ-, γγ-coin, T1/2. 209,210Rn deduced levels, J, π, ICC. Velocity filter.

doi: 10.1140/epja/i2006-10148-y
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006NI10      Eur.Phys.J. A 29, 281 (2006)

K.Nishio, S.Hofmann, F.P.Hessberger, D.Ackermann, S.Antalic, V.F.Comas, Z.Gan, S.Heinz, J.A.Heredia, H.Ikezoe, J.Khuyagbaatar, B.Kindler, I.Kojouharov, P.Kuusiniemi, B.Lommel, R.Mann, M.Mazzocco, S.Mitsuoka, Y.Nagame, T.Ohtsuki, A.G.Popeko, S.Saro, H.J.Schott, B.Sulignano, A.Svirikhin, K.Tsukada, K.Tsuruta, A.V.Yeremin

Measurement of evaporation residue cross-sections of the reaction 30Si + 238U at subbarrier energies

NUCLEAR REACTIONS 238U(30Si, F), (30Si, 3n), (30Si, 4n), (30Si, 5n), E=145.5, 151.2, 163.5 MeV; measured fission and evaporation residue σ.

RADIOACTIVITY 263,265Sg, 259Rf, 255No(α) [from 238U(30Si, xn) and subsequent decay]; measured Eα, T1/2. 262,264Sg, 261Rf(SF) [from 238U(30Si, xn) and subsequent decay]; measured T1/2, fission fragments kinetic energy.

doi: 10.1140/epja/i2006-10091-y
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2006RA38      Int.J. Mass Spectrom. 251, 146 (2006)

S.Rahaman, M.Block, D.Ackermann, D.Beck, A.Chaudhuri, S.Eliseev, H.Geissel, D.Habs, F.Herfurth, F.P.Hessberger, S.Hofmann, G.Marx, M.Mukherjee, J.B.Neumayr, M.Petrick, W.R.Plass, W.Quint, C.Rauth, D.Rodriguez, C.Scheidenberger, L.Schweikhard, P.G.Thirolf, C.Weber

On-line commissioning of SHIPTRAP

ATOMIC MASSES 147,148Er, 147Ho; measured masses and time of flight using the Penning-trap mass spectrometer SHIPTRAP. Nuclides produced at SHIP facility.

doi: 10.1016/j.ijms.2006.01.049
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2005AN17      Phys.Rev. C 72, 014612 (2005)

A.N.Andreyev, D.Ackermann, S.Antalic, I.G.Darby, S.Franchoo, F.P.Hessberger, S.Hofmann, M.Huyse, P.Kuusiniemi, B.Lommel, B.Kindler, R.Mann, G.Munzenberg, R.D.Page, S.Saro, B.Sulignano, B.Streicher, K.Van de Vel, P.Van Duppen, D.R.Wiseman

Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions

NUCLEAR REACTIONS 142Nd(52Cr, 3n), (52Cr, 4n), (52Cr, 5n), (52Cr, 6n), (52Cr, np), (52Cr, 2np), (52Cr, 3np), (52Cr, 4np), (52Cr, 5np), (52Cr, 6np), E=220-310 MeV; 142Nd(50Cr, 3n), (50Cr, 4n), (50Cr, 2np), (50Cr, 3np), (50Cr, 4np), (50Cr, 5np), E=230-285 MeV; 92Mo(98Mo, 2np), (98Mo, 3np), E=427-460 MeV; 93Nb(95Mo, n), (95Mo, 2n), (95Mo, 3n), (95Mo, p), (95Mo, np), (95Mo, 2np), (95Mo, 3np), (95Mo, 4np), E=375-456 MeV; 93Nb(94Mo, 2n), (94Mo, 3n), (94Mo, np), (94Mo, 2np), (94Mo, 3np), E=405-450 MeV; 144Sm(46Ti, 3n), (46Ti, 4n), E=202-242 MeV; measured σ. Velocity filter, comparison with statistical model predictions.

doi: 10.1103/PhysRevC.72.014612
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