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Tripathi, V.*; Lubna, R. S.*; Abromeit, B.*; Crawford, H. L.*; Liddick, S. N.*; Utsuno, Yutaka; Bender, P. C.*; Crider, B. P.*; Dungan, R.*; Fallon, P.*; et al.
Physical Review C, 95(2), p.024308_1 - 024308_7, 2017/02
Times Cited Count:7 Percentile:48.99(Physics, Nuclear)no abstracts in English
Chiara, C. J.*; Weisshaar, D.*; Janssens, R. V. F.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Harker, J. L.*; Walters, W. B.*; Recchia, F.*; Albers, M.*; Alcorta, M.*; et al.
Physical Review C, 91(4), p.044309_1 - 044309_10, 2015/04
Times Cited Count:39 Percentile:90.94(Physics, Nuclear)The neutron-rich isotope Ni was produced by multi-nucleon transfer reactions of
Zn in the Argonne National Laboratory, and an in-beam
-ray experiment were performed using the GRETINA array. The
and
levels of
Ni were observed for the first time. Those levels are regarded as large deformed states associated with proton excitation from the
orbit because they cannot be reproduced by a shell-model calculation assuming a small valence space without
. A theoretical analysis based on the Monte Carlo shell model published in 2014 indicates that those levels corresponds to a prolate deformed band. The present result demonstrates the occurrence of shape coexistence in neutron-rich Ni isotopes other than a known case of
Ni, and confirms the predictive power of the Monte Carlo shell-model calculation.
Bender, P. C.*; Tabor, S. L.*; Tripathi, V.*; Hoffman, C. R.*; Hamilton, L.*; Volya, A.*; Clark, R. M.*; Fallon, P.*; Macchiavelli, A. O.*; Paschalis, S.*; et al.
Physical Review C, 85(4), p.044305_1 - 044305_10, 2012/04
Times Cited Count:12 Percentile:55.17(Physics, Nuclear)The available experimental information on P has been greatly increased through the analysis of
decays in coincidence with protons from the interaction of an
O beam at 24 MeV with an
O target. Light charged particles from the reaction were detected with Microball, and multiple
ray coincidences with Gammasphere. Many newly observed
transitions have been identified and placed in the level scheme. Additionally, for most states, spins have been assigned based on measured
ray angular distributions while parities were inferred from lifetimes determined through Doppler-broadened line-shape analysis. Most of the states observed have been interpreted in terms of shell-model calculations using the WBP-a and SDPF-NR interactions having one particle in the 0
or 1
orbital. The two calculations agree almost equally well with the data resulting in root-mean-square differences of about 200 keV. However, two of a few high-lying states may be associated with stretched
states, but the calculations over-predict their energies by 2-3 MeV. Furthermore, a newly observed long-lived 7919-keV state is established for which no explanation is available at present.
Fallon, P.*; Rodriguez-Vieitez, E.*; Macchiavelli, A. O.*; Gade, A.*; Tostevin, J. A.*; Adrich, P.*; Bazin, D.*; Bowen, M.*; Campbell, C. M.*; Clark, R. M.*; et al.
Physical Review C, 81(4), p.041302_1 - 041302_5, 2010/04
Times Cited Count:41 Percentile:88.44(Physics, Nuclear)no abstracts in English
Wiedeking, M.*; Rodriguez-Vieitez, E.*; Fallon, P.*; Carpenter, M. P.*; Clark, R. M.*; Cline, D.*; Cromaz, M.*; Descovich, M.*; Janssens, R. V. F.*; Lee, I.-Y.*; et al.
Physical Review C, 78(3), p.037302_1 - 037302_4, 2008/09
Times Cited Count:14 Percentile:64.34(Physics, Nuclear)no abstracts in English