Daugas, J. M.; Sawicka, M.; Pfutzner, M.; Matea, I.; Grawe, H.; Grzywacz, Robert Kazimierz; Bingham, Carrol R; Grzywacz-Jones, K. L.; Rykaczewski, Krzysztof Piotr
Oak Ridge National Laboratory (United States); Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (United States)2006
Oak Ridge National Laboratory (United States); Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (United States)2006
AbstractAbstract
[en] An island of isomers have recently been observed on both sides of the N=40 shell below the Ni isotopes. Isomeric states in the 65Fe and 67Fe allow the knowledge of the single particle structure around the g9/2 shell. Moreover, the excitation energy of the first 2+ and 4+ states in the 68Fe have been established by β-γ correlation. The evolution of the structure of the Fe isotopes going far away from the valley of stability is, for the first time, given for N>40
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Source
1 May 2006; 3 p; International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions; Kos (Greece); 12-17 Sep 2005; KB0401021; ERKBP06; AC05-00OR22725; Available from Oak Ridge National Laboratory, Oak Ridge, TN (US); pages 427-429
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Report
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Conference
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Rykaczewski, Krzysztof Piotr; Mazzocchi, C.; Grzywacz, Robert Kazimierz; Batchelder, J.C.; Bingham, Carrol R.; Fong, D.; Hamilton, J.H.; Hwang, J.K.; Karny, M.; Krolas, W.; Liddick, S.N.; Lisetskiy, A. F.; Morton, N.H.; Mantica, P.F.; Mueller, W.F.; Steiner, M.; Stolz, A.; Winger, J.A.
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (Seychelles) (US)2005
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (Seychelles) (US)2005
AbstractAbstract
[en] The structure of magic neutron-rich nickel isotopes produced in the fragmentation of a 140 A MeV 86Kr beam was investigated. For the first time four gamma transitions were assigned to the decay of the Iπ=8+, T1/2 = 590+180-110isomer, thus establishing the 0+-2+-4+-6+-8+ ground-state band in 76Ni. The previously unknown 2+ and 4+ levels belonging to the ground-state band in 74Ni were identified in the β decay of 74Co (T1/2=30(3) ms). The decay properties of 72Co → 72Ni were verified and confirmed on the basis of γ-γ coincidence data. The relevance of the measured level properties for the magicity of 78Ni is analyzed with the help of advanced shell-model predictions
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Source
ORNL/PTS--5497; KB0401021; ERKBP06; AC05-00OR22725
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Journal Article
Journal
Physics Letters. Section B; ISSN 0370-2693; ; v. 622(1-2); p. 45-54
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Rykaczewski, Krzysztof Piotr; Tantawy, M.N.; Bingham, Carrol R; Mazzocchi, C.; Grzywacz, Robert Kazimierz; Krolas, H.; Batchelder, J.C.; Gross, Carl J.; Fong, D.; Hamilton, J.H.; Hartley, D. J.; Hwang, J.K.; Larochelle, Y.; Piechaczek, A.; Ramayya, A.V.; Shapira, Dan; Winger, J.A.; Yu, Chang-Hong; Zganjar, E.F.
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science SC (United States)2005
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science SC (United States)2005
AbstractAbstract
[en] The evolution of the πh11/2νh11/2 and πh11/2νs1/2 isomeric configurations was studied for the N. = 77 isotones near the proton drip line. The decays of metastable levels in 140Eu, 142Tb, and 144Ho were measured by means of X-, gamma- and conversion electron spectroscopy at the Recoil Mass Spectrometer at Oak Ridge. The sequence of isomeric levels in 140Eu was experimentally determined. The half-life of the πh11/2νh11/2 state in 142Tb was remeasured to be 25(1) (micro)s. The spins and parities of 5- and 8+ for the πh11/2νs1/2 and πh11/2νh11/2142Tb isomers, respectively, were established from measured multipolarities. No evidence for the expected 1+ ground state was found in the 144Ho decay data
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Source
ORNL/PTS--5502; KB0401021; ERKBP06; AC05-00OR22725
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Journal Article
Journal
European Physical Journal. A; ISSN 1434-6001; ; v. 25(s01); p. 151-153
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Rykaczewski, Krzysztof Piotr; Batchelder, J.C.; Tantawy, M.N.; Bingham, Carrol R.; Danchev, M.; Fong, D.; Ginter, T.N.; Gross, Carl J.; Grzywacz, Robert Kazimierz; Hagino, K.; Hamilton, Joseph H; Karny, M.; Krolas, W.; Mazzocchi, C.; Piechaczek, A.; Ramayya, A.V.; Stolz, A.; Winger, J.A.; Yu, Chang-Hong; Zganjar, E.F.
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (Seychelles) (US)2005
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (Seychelles) (US)2005
AbstractAbstract
[en] Measurement of fine structure in proton emission allows one to deduce the composition of the parent and daughter state's wavefunction populated by proton emission. This paper presents new experimental data on the fine-structure decay of 146Tm, and a new interpretation of its decay properties
Primary Subject
Source
ORNL/PTS--5504; KB0401021; ERKBP06; AC05-00OR22725
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Journal Article
Journal
European Physical Journal. A; ISSN 1434-6001; ; v. 25; p. 149-150
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Batchelder, Jon Charles; Wood, John L.; Garrett, Paul; Rykaczewski, Krzysztof Piotr; Bilheux, Jean-Christophe; Bingham, Carrol R.; Carter, H. Kennon; Fong, Dennis; Grzywacz, R.; Hamilton, Joseph; Hartley, D.J.; Hwang, J.K.; Krolas, W.; Kulp, David; Larochelle, Y.; Piechzczek, A.; Ramayya, A.V.; Spejewski, E.H.; Stracener, Dan; Tantawy, M.N.; Winger, J.A.; Zganjar, E.F.
Oak Ridge National Laboratory (United States); Holifield Radioactive Ion Beam Facility (United States). Funding organisation: ORNL work for others (United States)2009
Oak Ridge National Laboratory (United States); Holifield Radioactive Ion Beam Facility (United States). Funding organisation: ORNL work for others (United States)2009
AbstractAbstract
[en] We have re-investigated the beta decay of the three isomers of 116Ag at the Holifield Radioactive Ion Beam Facility (HRIBF). Through the use of half-life information, we have been able to construct individual decay schemes for each isomer, and correct what was a puzzling inconsistency with the published data, namely the β feeding of 2+ states by a 5+ isomer. Our results indicate that the feeding of these levels arises from a 3+ isomer in 116Ag. A total of 271 gamma-ray transitions (159 new) were assigned to 148 levels (94 new) from the beta-decay of 116Agm1,m2,gs. Significant deviations are observed from expected U(5) symmetry in the 0+ and 2+ members of the previously assigned three-phonon quintuplet. Candidate states for the quadrupole-octupole quintuplet states and πg9/2-πp1/2, πg9/2-πp3/2, νh11/2-νs1/2, νh11/2-νd3/2, and νh11/2-νd5/2 broken pair states are assigned.
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Source
AC05-00OR22725
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Journal Article
Journal
Physical Review. C, Nuclear Physics; ISSN 0556-2813; ; v. 80(5); p. 054318
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Rykaczewski, Krzysztof Piotr; Georgiev, G.; Neyens, G.; Hass, M.; Balabanski, Dimiter Loukanov; Bingham, Carrol R; Borcea, C.; Coulier, N.; Coussenment, R.; Daugas, J. M.; De France, Gilles M.; Gorska, M.; Grawe, Hubert H; Grzywacz, Robert Kazimierz; Lewitowicz, Marek; Mach, Henryk A; Matea, I.; de Oliveira Santos, F.; Page, R.D.; Pfutzner, Marek; Penionzhkevich, Yu. E.; Podolyak, Zsolt F.; Regan, Patrick H; Sawicka, M.; Smirnova, N. A.; Sobolev, Yu.; Stanoiu, M.; Teughels, S.; Vyvey, K.
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (Seychelles) (US)2004
Oak Ridge National Laboratory, Holifield Radioactive Ion Beam Facility (United States). Funding organisation: SC USDOE - Office of Science (Seychelles) (US)2004
AbstractAbstract
[en] We report the results from the first experiment to measure gyromagnetic factors of (micro)s isomers in neutron-rich nuclei produced by intermediate-energy projectile-fragmentation reactions. The Time Dependent Perturbed Angular Distribution (TDPAD) method was applied in combination with the heavy-ion-gamma correlation technique. The nuclides in the vicinity of 68Ni were produced and spin-oriented following the fragmentation of a 76Ge, 61.4 MeV/ u beam at GANIL. The results obtained, |g|(69mCu) = 0.225(25) and |g|(67mNi) = 0.125(6) provide another indication of the importance of proton excitation across the Z = 28 shell gap for the description of these states
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Source
ORNL/PTS--5475; KB0401021; ERKBP06; AC05-00OR22725
Record Type
Journal Article
Journal
European Physical Journal. A; ISSN 1434-6001; ; v. 20; p. 93-94
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