Low-lying excitations inNi 72
Author(s) -
A. I. Morales,
G. Benzoni,
H. Watanabe,
S. Nishimura,
F. Browne,
R. Daido,
P. Doornenbal,
Y. Fang,
G. Lorusso,
Z. Patel,
S. Rice,
L. Sinclair,
P.-A. Söderström,
T. Sumikama,
J. Wu,
Z. Y. Xu,
A. Yagi,
R. Yokoyama,
H. Baba,
R. Avigo,
F. L. Bello Garrote,
N. Blasi,
A. Bracco,
F. Camera,
S. Ceruti,
F. C. L. Crespi,
G. de Angelis,
M.-C. Delattre,
Zs. Dombrádi,
A. Gottardo,
T. Isobe,
I. Kojouharov,
N. Kurz,
I. Kuti,
K. Matsui,
B. Melon,
D. Mengoni,
T. Miyazaki,
V. Modamio-Hoyborg,
S. Momiyama,
D. R. Napoli,
M. Nııkura,
R. Orlandi,
H. Sakuraï,
E. Şahin,
D. Sohler,
H. Shaffner,
R. Taniuchi,
J. Taprogge,
Zs. Vajta,
J. J. Valiente-Dobón,
O. Wieland,
M. Yalçınkaya
Publication year - 2016
Publication title -
physical review. c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.679
H-Index - 235
eISSN - 2469-9993
pISSN - 2469-9985
DOI - 10.1103/physrevc.93.034328
Subject(s) - physics , excited state , neutron , atomic physics , crystallography , nuclear physics , chemistry
International audienceLow-lying excited states in Ni72 have been investigated in an in-flight fission experiment at the RIBF facility of the RIKEN Nishina Center. The combination of the state-of-the-art BigRIPS and EURICA setups has allowed for a very accurate study of the β decay from Co72 to Ni72, and has provided first experimental information on the decay sequence Fe72→Co72→Ni72 and on the delayed neutron-emission branch Co73→Ni72. Accordingly, we report nearly 60 previously unobserved γ transitions which deexcite 21 new levels in Ni72. Evidence for the location of the so-sought-after (4+2),(6+2), and (8+1) seniority states is provided. As well, the existence of a low-spin β-decaying isomer in odd-odd neutron-rich Co isotopes is confirmed for mass A=72. The new experimental information is compared to simple shell-model calculations including only neutron excitations across the fpg shells. It is shown that, in general, the calculations reproduce well the observed states
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