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NSR database version of May 20, 2024.

Search: Author = O.Arndt

Found 25 matches.

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2012QU01      Phys.Rev. C 85, 035807 (2012)

M.Quinn, A.Aprahamian, J.Pereira, R.Surman, O.Arndt, T.Baumann, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, T.Ginter, M.Hausmann, S.Hennrich, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, F.Montes, B.Pfeiffer, M.Portillo, H.Schatz, F.Schertz, L.Schnorrenberger, E.Smith, A.Stolz, W.B.Walters, A.Wohr

β decay of nuclei around 90Se: Search for signatures of a N=56 subshell closure relevant to the r process

NUCLEAR REACTIONS 9Be(136Xe, X)86As/87As/88As/88Se/89Se/90Se/90Br/91Br/92Br/93Br/91Kr/92Kr/93Kr/94Kr/95Kr/93Rb/94Rb/95Rb/96Rb/97Rb/95Sr/96Sr/97Sr/98Sr/99Sr/97Y/98Y/99Y/100Y/101Y/100Zr/101Zr/102Zr/103Zr, E=120 MeV/nucleon; measured fragment spectra by energy loss and time-of-flight, total kinetic energies (TKE) of 97,98,99Sr fragments in 36+, 37+, 38+ charge states, half-lives by fragment-β correlations. Beta Counting System (BCS) at NSCL.

RADIOACTIVITY 87,88As, 88,89,90Se, 90,91,92,93Br, 93,94,95Kr, 95,96,97Rb, 96,97,98,99Sr, 99,100,101Y(β-)[from 9Be(136Xe, X), E=120 MeV/nucleon]; measured Eβ, Eγ, (fragment)β correlations, half-lives. Beta Counting System (BCS) at NSCL and SEGA array. Maximum likelihood and least-squares analyses for half-lives. Comparison of measured half-lives with QRPA calculations used in r process, and with previous measurements. Role of g9/2 proton and h11/2 neutron intruders. No evidence of N=56 subshell closure in 90Se. Relevance to r-process nuclei.

doi: 10.1103/PhysRevC.85.035807
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2012WE08      J.Phys.:Conf.Ser. 337, 012018 (2012)

L.Weissman, U.Bergmann, J.Cederkall, L.Fraile, S.Franchoo, H.O.U.Fynbo, T.Fritioff, U.Koster, O.Arnd, I.Dillman, O.Hallmann, K.-L.Kratz, B.Pfeiffer, A.Wohr, L.Gaudefroy, O.Sorlin, for the ISOLDE collaboration

Decay of 48-50Ar isotopes

RADIOACTIVITY 48,49,50Ar(β-)[from mass separator]; measured β-gated Eγ, Iγ, γγ-coin, Eβ, Iβ, βγ-coin using βγ detector, β telescope and secondary ECR ion source; deduced T1/2.

doi: 10.1088/1742-6596/337/1/012018
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2011AR18      Phys.Rev. C 84, 061307 (2011)

O.Arndt, K.-L.Kratz, W.B.Walters, K.Farouqi, U.Koster, V.Fedosseev, S.Hennrich, C.J.Jost, A.Wohr, A.A.Hecht, B.Pfeiffer, J.Shergur, N.Hoteling

Decay of the r-process nuclides 137, 138, 139Sb, and the A=130 solar r-process abundance peak

RADIOACTIVITY 137,138,139Sb, 136,137Sn(β-), (β-n); measured E(n), I(n), half-lives, β-delayed neutron emission probability Pn using RILIS source and high-resolution mass separator at ISOLDE-CERN facility. 134,135,136,137,138,139,140Sb(β-), (β-n); calculated half-lives and β-delayed neutron probabilities for spherical and non-spherical shapes. Calculated r-process residual isotopic abundance plot using new data.

doi: 10.1103/PhysRevC.84.061307
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2011PE34      J.Phys.:Conf.Ser. 312, 042019 (2011)

J.Pereira, A.Aprahamian, O.Arndt, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, S.Hennrich, P.Hosmer, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, F.Montes, B.Pfeiffer, M.Quinn, P.Santi, H.Schatz, F.Schertz, L.Schnorrenberger, E.Smith, A.Stolz, W.B.Walters, A.Wohr

β-decay measurements of A simeq 70 ≈ 110 r-process nuclei at the National Superconducting Cyclotron Laboratory

RADIOACTIVITY 106,107,108,109Nb, 108,109,110,111Mo(β-); compiled T1/2; calculated T1/2, Solar system r-process abundances using new T1/2.

doi: 10.1088/1742-6596/312/4/042019
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2010HO12      Phys.Rev. C 82, 025806 (2010)

P.Hosmer, H.Schatz, A.Aprahamian, O.Arndt, R.R.C.Clement, A.Estrade, K.Farouqi, K.-L.Kratz, S.N.Liddick, A.F.Lisetskiy, P.F.Mantica, P.Moller, W.F.Mueller, F.Montes, A.C.Morton, M.Ouellette, E.Pellegrini, J.Pereira, B.Pfeiffer, P.Reeder, P.Santi, M.Steiner, A.Stolz, B.E.Tomlin, W.B.Walters, A.Wohr

Half-lives and branchings for β-delayed neutron emission for neutron-rich Co-Cu isotopes in the r-process

RADIOACTIVITY 73,74,75Co, 75,76,77,78Ni, 76,77,78,79,80Cu, 79,80,81Zn, 81,82Ga(β-), (β-n)[from Be(86Kr, X), E=140 MeV/nucleon]; measured β spectra, βn-coin, neutron spectra, half-lives, delayed neutron-emission probabilities; calculated half-lives, P(n) using QRPA, CQRPA and OXBASH shell model. Discussed effects on various types of models for the rapid neutron-capture process (r-process) in nucleosynthesis. A=1-210; calculated abundances with classical r-process and HEW models using known decay data. 78Ni(β-); calculated Gamow-Teller strengths, effect on abundances.

doi: 10.1103/PhysRevC.82.025806
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2009AR04      Acta Phys.Pol. B40, 437 (2009)

O.Arndt, S.Hennrich, N.Hoteling, C.J.Jost, B.E.Tomlin, J.Shergur, K.-L.Kratz, P.F.Mantica, B.A.Brown, R.V.F.Janssens, W.B.Walters, B.Pfeiffer, A.Wohr, S.Zhu, R.Broda, M.P.Carpenter, B.Fornal, A.A.Hecht, W.Krolas, T.Lauritsen, T.Pawlat, J.Pereira, D.Seweryniak, I.Stefanescu, J.R.Stone, J.Wrzesinski

Structure of Neutron-Rich Odd-Mass 127, 129, 131In Populated in the Decay of 127, 129, 131Cd

RADIOACTIVITY 127,129,131Cd(β-); measured Iγ, Eγ; deduced Jπ, level scheme. Comparison with calculations.


2009PE06      Phys.Rev. C 79, 035806 (2009)

J.Pereira, S.Hennrich, A.Aprahamian, O.Arndt, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, P.Moller, F.Montes, B.Pfeiffer, H.Schatz, F.Schertz, L.Schnorrenberger, E.Smith, A.Stolz, M.Quinn, W.B.Walters, A.Wohr

β-decay half-lives and β-delayed neutron emission probabilities of nuclei in the region A ≤ 110, relevant for the r process

RADIOACTIVITY 100,101,102,103,104,105Y, 103,104,105,106,107Zr, 106,107,108,109Nb, 108,109,110,111Mo, 109,110,111,112,113Tc(β-), (β-n)[from 9Be(136Xe, X), E=120 MeV/nucleon]; measured fragments, neutrons, β, (fragment)β-coin, half-lives; deduced delayed neutron-emission probabilities. Comparisons with quasiparticle random phase approximation (QRPA03 and QRPA06) calculations. Discussed relevance to r-process nuclei.

doi: 10.1103/PhysRevC.79.035806
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2008PE17      Nucl.Phys. A805, 470c (2008)

J.Pereira, A.Aprahamian, O.Arndt, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, S.Hennrich, P.Hosmer, L.Schnorrenberger, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, F.Montes, B.Pfeiffer, M.Quinn, P.Santi, H.Schatz, F.Schertz, E.Smith, B.E.Tomlin, W.B.Walters, A.Wohr

β-decay studies of r-process nuclei at NSCL

doi: 10.1016/j.nuclphysa.2008.02.268
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2007MA40      Acta Phys.Pol. B38, 1213 (2007)

H.Mach, L.M.Fraile, O.Arndt, A.Blazhev, N.Boelaert, M.J.G.Borge, R.Boutami, H.Bradley, N.Braun, B.A.Brown, P.A.Butler, A.Covello, Z.Dlouhy, C.Fransen, H.O.U.Fynbo, A.Gargano, Ch.Hinke, P.Hoff, A.Joinet, A.Jokinen, J.Jolie, U.Koster, A.Korgul, K.-L.Kratz, T.Kroll, W.Kurcewicz, J.Nyberg, E.-M.Reillo, E.Ruchowska, W.Schwerdtfeger, G.S.Simpson, M.Stanoiu, O.Tengblad, P.G.Thirolf, W.B.Walters

The Single-Particle and Collective Features in the Nuclei Just Above 132Sn

RADIOACTIVITY 136Sn(β-); measured Eγ, Iγ, γγ-coinc. 135Sb deduced levels, B(E2).


2007WH01      Phys.Rev. C 76, 057303 (2007)

E.R.White, H.Mach, L.M.Fraile, U.Koster, O.Arndt, A.Blazhev, N.Boelaert, M.J.G.Borge, R.Boutami, H.Bradley, N.Braun, Z.Dlouhy, C.Fransen, H.O.U.Fynbo, Ch.Hinke, P.Hoff, A.Joinet, A.Jokinen, J.Jolie, A.Korgul, K.-L.Kratz, T.Kroll, W.Kurcewicz, J.Nyberg, E.-M.Reillo, E.Ruchowska, W.Schwerdtfeger, G.S.Simpson, M.Stanoiu, O.Tengblad, P.G.Thirolf, V.Ugryumov, W.B.Walters

Lifetime measurement of the 167.1 keV state in 41Ar

RADIOACTIVITY 41Cl(β-) [from U(p, X), E=1.4 GeV]; measured Eγ, Iγ, γγ-coin, βγγ-coin, βγ(t). 41Ar; measured half-lives of isomeric states; deduced levels, J, π, multipolarities, B(E2), B(M1).

doi: 10.1103/PhysRevC.76.057303
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2006MO07      Phys.Rev. C 73, 035801 (2006)

F.Montes, A.Estrade, P.T.Hosmer, S.N.Liddick, P.F.Mantica, A.C.Morton, W.F.Mueller, M.Ouellette, E.Pellegrini, P.Santi, H.Schatz, A.Stolz, B.E.Tomlin, O.Arndt, K.-L.Kratz, B.Pfeiffer, P.Reeder, W.B.Walters, A.Aprahamian, A.Wohr

β-decay half-lives and β-delayed neutron emission probabilities for neutron rich nuclei close to the N = 82 r-process path

RADIOACTIVITY 114,115Tc, 114,115,116,117,118Ru, 116,117,118,119,120,121Rh, 119,120,121,122,123,124Pd, 121,122,123,124Ag(β-) [from Be(136Xe, X)]; measured T1/2. 116,117,118,119,120Rh, 121,122,123Pd, 122,123,124Ag(β-n); measured β-delayed neutron emission probability. Astrophysical implications discussed.

doi: 10.1103/PhysRevC.73.035801
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2005HO08      Phys.Rev.Lett. 94, 112501 (2005)

P.T.Hosmer, H.Schatz, A.Aprahamian, O.Arndt, R.R.C.Clement, A.Estrade, K.-L.Kratz, S.N.Liddick, P.F.Mantica, W.F.Mueller, F.Montes, A.C.Morton, M.Ouellette, E.Pellegrini, B.Pfeiffer, P.Reeder, P.Santi, M.Steiner, A.Stolz, B.E.Tomlin, W.B.Walters, A.Wohr

Half-Life of the Doubly Magic r-Process Nucleus 78Ni

RADIOACTIVITY 75,76,77,78Ni, 77,78Cu(β-) [from Be(86Kr, X)]; measured T1/2. Astrophysical implications discussed.

doi: 10.1103/PhysRevLett.94.112501
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2005KA45      Eur.Phys.J. A 25, Supplement 1, 117 (2005)

T.Kautzsch, A.Wohr, W.B.Walters, K.-L.Kratz, B.Pfeiffer, M.Hannawald, J.Shergur, O.Arndt, S.Hennrich, S.Falahat, T.Griesel, O.Keller, A.Aprahamian, B.A.Brown, P.F.Mantica, M.A.Stoyer, H.L.Ravn, for the ISOLDE IS333 and Rochester CHICO/Gammasphere Collaborations

Structure of neutron-rich even-even 124, 126Cd

RADIOACTIVITY 124,126Ag(β-); measured Eγ, Iγ, γγ-coin following decay of mass-separated sources. 124,126Cd deduced levels, J, π. Comparison with shell-model predictions.

doi: 10.1140/epjad/i2005-06-197-6
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2005KO43      Eur.Phys.J. A 25, Supplement 1, 729 (2005)

U.Koster, O.Arndt, U.C.Bergmann, R.Catherall, J.Cederkall, I.Dillmann, M.Dubois, F.Durantel, L.Fraile, S.Franchoo, G.Gaubert, L.Gaudefroy, O.Hallmann, C.Huet-Equilbec, B.Jacquot, P.Jardin, K.L.Kratz, N.Lecesne, R.Leroy, A.Lopez, L.Maunoury, J.Y.Pacquet, B.Pfeiffer, M.G.Saint-Laurent, C.Stodel, A.C.C.Villari, L.Weissman

ISOL beams of neutron-rich oxygen isotopes

NUCLEAR REACTIONS U(p, X)19O/20O/21O/22O, E=1.4GeV; measured yields.

doi: 10.1140/epjad/i2005-06-199-4
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2005KR20      Eur.Phys.J. A 25, Supplement 1, 633 (2005)

K.-L.Kratz, B.Pfeiffer, O.Arndt, S.Hennrich, A.Wohr, and the ISOLDE/IS333/IS378/IS393 Collaborations

r-process isotopes in the 132Sn region

doi: 10.1140/epjad/i2005-06-157-2
Citations: PlumX Metrics


2005MO30      Nucl.Phys. A758, 643c (2005)

F.Montes, H.Schatz, A.Aprahamian, O.Arndt, A.Estrade, K.-L.Kratz, S.N.Liddick, P.F.Mantica, W.F.Mueller, P.Hosmer, A.C.Morton, M.Ouellette, E.Pellegrini, B.Pfeiffer, P.Reeder, P.Santi, A.Stolz, B.E.Tomlin, W.B.Walters, A.Wohr

β-Decay Studies Close to the N=82 r-process Path

RADIOACTIVITY 119Rh(β-) [from Be(136Xe, X)]; measured T1/2.

doi: 10.1016/j.nuclphysa.2005.05.188
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2005SC28      Eur.Phys.J. A 25, Supplement 1, 639 (2005)

H.Schatz, P.T.Hosmer, A.Aprahamian, O.Arndt, R.R.C.Clement, A.Estrade, K.-L.Kratz, S.N.Liddick, P.F.Mantica, W.F.Mueller, F.Montes, A.C.Morton, M.Ouellette, E.Pellegrini, B.Pfeiffer, P.Reeder, P.Santi, M.Steiner, A.Stolz, B.E.Tomlin, W.B.Walters, A.Wohr

The half-life of the doubly-magic r-process nucleus 78Ni

RADIOACTIVITY 78Ni(β-) [from 86Kr fragmentation]; measured T1/2. Comparison with model predictions, astrophysical implications discussed.

doi: 10.1140/epjad/i2005-06-069-1
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2005SH23      Phys.Rev. C 71, 064321 (2005)

J.Shergur, A.Wohr, W.B.Walters, K.-L.Kratz, O.Arndt, B.A.Brown, J.Cederkall, I.Dillmann, L.M.Fraile, P.Hoff, A.Joinet, U.Koster, B.Pfeiffer

Level structure of odd-odd 134Sb populated in the β- decays of 134, 135Sn

RADIOACTIVITY 134Sn(β-); 135Sn(β-), (β-n); measured Eγ, Iγ, βγ-, γγ-coin. 134Sb deduced levels, J, π, β-decaying isomeric state. Mass separator, shell model calculations.

doi: 10.1103/PhysRevC.71.064321
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2005SH36      Phys.Rev. C 72, 024305 (2005)

J.Shergur, A.Wohr, W.B.Walters, K.-L.Kratz, O.Arndt, B.A.Brown, J.Cederkall, I.Dillmann, L.M.Fraile, P.Hoff, A.Joinet, U.Koster, B.Pfeiffer

Identification of shell-model states in 135Sb populated via β- decay of 135Sn

RADIOACTIVITY 135Sn(β-) [from U(n, F)]; measured Eγ, Iγ, γγ-coin. 135Sb deduced levels, J, π. Resonance ionization, mass separator. Comparisons with shell-model predictions.

doi: 10.1103/PhysRevC.72.024305
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2005SH53      Eur.Phys.J. A 25, Supplement 1, 121 (2005)

J.Shergur, N.Hoteling, A.Wohr, W.B.Walters, O.Arndt, B.A.Brown, C.N.Davids, D.J.Dean, K.-L.Kratz, B.Pfeiffer, D.Seweryniak, and the ISOLDE Collaboration

New level information on Z = 51 isotopes, 111Sb60 and 134, 135Sb83, 84

RADIOACTIVITY 111Te(β+) [from 58Ni(56Fe, 2pn)]; 135Sn(β-), (β-n) [from U(p, F), E=1.4 GeV]; measured Eγ, Iγ, γγ-coin following decay of mass-separated sources. 111,134,135Sb deduced levels, J, π. Comparison with model calculations.

doi: 10.1140/epjad/i2005-06-071-7
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2005WE06      J.Phys.(London) G31, 553 (2005)

L.Weissman, A.F.Lisetskiy, O.Arndt, U.Bergmann, B.A.Brown, J.Cederkall, I.Dillmann, O.Hallmann, L.Fraile, S.Franchoo, L.Gaudefroy, U.Koster, K.-L.Kratz, B.Pfeiffer, O.Sorlin, and the ISOLDE Collaboration

β-decay of 22O

RADIOACTIVITY 22O, 22F(β-) [from U(p, X) and subsequent decay]; measured Eγ, Iγ, γγ-, βγ-coin, T1/2. 22F deduced levels, J, π, β-feeding intensities. 22Ne deduced transitions. Mass separator, comparison with model predictions.

doi: 10.1088/0954-3899/31/7/002
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2004ST28      Nucl.Phys. A746, 54c (2004)

A.Stolz, A.Estrade, A.D.Davies, T.N.Ginter, P.T.Hosmer, E.Kwan, S.N.Liddick, P.F.Mantica, T.J.Mertzimekis, F.A.Montes, D.J.Morrissey, A.C.Morton, M.Ouellette, E.Pellegrini, P.Santi, H.Schatz, M.Steiner, A.E.Stuchbery, B.E.Tomlin, W.B.Walters, A.Woehr, O.Arndt, K.-L.Kratz, B.Pfeiffer, P.Reeder

Radioactive ion beams in the region of 100Sn and 78Ni at the NSCL

NUCLEAR REACTIONS Be, Ni, Nb(124Xe, X), E=140 MeV/nucleon; measured fragments isotopic yields, prompt and delayed (particle)γ-coin. Be(86Kr, X), E=140 MeV/nucleon; measured fragments isotopic yields; deduced evidence for 78Ni.

doi: 10.1016/j.nuclphysa.2004.09.017
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2004WE09      Phys.Rev. C 70, 024304 (2004)

L.Weissman, O.Arndt, U.Bergmann, A.Brown, R.Catherall, J.Cederkall, I.Dillmann, O.Hallmann, L.Fraile, S.Franchoo, L.Gaudefroy, U.Koster, K.-L.Kratz, B.Pfeiffer, O.Sorlin

β decay of 47Ar

RADIOACTIVITY 47Ar(β-) [from 238U(p, X)]; measured Eγ, Iγ, T1/2; deduced logft, neutron emission probability upper limit. 47Ar deduced ground-state J, π. 47K deduced levels, J, π.

doi: 10.1103/PhysRevC.70.024304
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2004WE11      Phys.Rev. C 70, 057306 (2004)

L.Weissman, O.Arndt, U.Bergmann, J.Cederkall, I.Dillmann, O.Hallmann, L.Fraile, S.Franchoo, L.Gaudefroy, U.Koster, K.L.Kratz, A.F.Lisetskiy, B.Pfeiffer, O.Sorlin, S.Tabor

β decay of 26Ne

RADIOACTIVITY 26Ne(β-) [from U(p, F)]; measured β-delayed Eγ, Iγ, γγ-, βγ-coin, T1/2; deduced log ft. 26Na deduced levels, J, π, β-feeding intensities.

doi: 10.1103/PhysRevC.70.057306
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2003DI06      Phys.Rev.Lett. 91, 162503 (2003)

I.Dillmann, K.-L.Kratz, A.Wohr, O.Arndt, B.A.Brown, P.Hoff, M.Hjorth-Jensen, U.Koster, A.N.Ostrowski, B.Pfeiffer, D.Seweryniak, J.Shergur, W.B.Walters, and the ISOLDE Collaboration

N = 82 Shell Quenching of the Classical r-Process "Waiting-Point" Nucleus 130Cd

RADIOACTIVITY 130Cd(β-) [from U(n, F)]; measured Eγ, Eβ, γγ-, βγ-coin; deduced Qβ. 130In deduced levels, J, π, configurations, shell quenching. Astrophysical implications discussed. Resonance-ionization laser ion source.

doi: 10.1103/PhysRevLett.91.162503
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