Shell Evolution towards Ni-78: Low-Lying States in Cu-77
Date
2017Author
NISHIMURA, S.
JOHN, P. R.
Jung, H. S.
KOJOUHAROV, I.
KUBO, T.
KURZ, N.
LI, Z.
SAHIN, E.
GARROTE, F. L. Bello
TSUNODA, Y.
SAKURAI, H.
SCHAFFNER, H.
SODERSTROM, P. -A.
Sohler, D.
STEFAN, I. G.
Sumikama, T.
SUZUKI, D.
TANIUCHI, R.
TAPROGGE, J.
VAJTA, Z.
WATANABE, H.
WERNER, V.
WU, J.
YAGI, A.
YOSHINAGA, K.
Yalcinkaya, Mehtap
LORUSSO, G.
MATEA, I.
MATSUI, K.
MENGONI, D.
MORFOUACE, P.
NAPOLI, D. R.
NAQVI, F.
Nishibata, H.
Odahara, A.
OTSUKA, T.
DE ANGELIS, G.
GORGEN, A.
NIIKURA, M.
XU, Z. Y.
BABA, H.
BROWNE, F.
DELATTRE, M. -C.
DOORNENBAL, P.
FRANCHOO, S.
GEY, G.
HADYNSKA-KLEK, K.
ISOBE, T.
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Show full item recordAbstract
The level structure of the neutron-rich Cu-77 nucleus is investigated through beta-delayed gamma-ray spectroscopy at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. Ions of Ni-77 are produced by inflight fission, separated and identified in the BigRIPS fragment separator, and implanted in the WAS3ABi silicon detector array, surrounded by Ge cluster detectors of the EURICA array. A large number of excited states in Cu-77 are identified for the first time by correlating gamma rays with the beta decay of Ni-77, and a level scheme is constructed by utilizing their coincidence relationships. The good agreement between large-scale Monte Carlo shell model calculations and experimental results allows for the evaluation of the single-particle structure near Ni-78 and suggests a single-particle nature for both the 5/2(1)(-) and 3/2(1)(-) states in Cu-77, leading to doubly magic Ni-78.
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