Low-lying excitations in Ni-72

MORALES, A.; BENZONI, G.; WATANABE, H.; NISHIMURA, S.; BROWNE, F.; Daido, R.; DOORNENBAL, P.; Fang, Y.; LORUSSO, G.; PATEL, Z.; RICE, S.; SINCLAIR, L.; SOEDERSTROEM, P-A; Sumikama, T.; WU, J.; XU, Z.; Yagi, A.; YOKOYAMA, R.; BABA, H.; AVIGO, R.; GARROTE, F.; BLASI, N.; BRACCO, A.; CAMERA, F.; CERUTI, S.; CRESPI, F.; DE ANGELIS, G.; DELATTRE, M.; DOMBRADI, Zs.; GOTTARDO, A.; ISOBE, T.; KOJOUHAROV, I.; KURZ, N.; KUTI, I.; MATSUI, K.; MELON, B.; MENGONI, D.; MIYAZAKI, T.; MODAMIO-HOYBORG, V.; MOMIYAMA, S.; NAPOLI, D.; NIIKURA, M.; ORLANDI, R.; SAKURAI, H.; SAHIN, E.; SOHLER, D.; SHAFFNER, H.; TANIUCHI, R.; TAPROGGE, J.; VAJTA, ZS; VALIENTE-DOBON, J.; WIELAND, O.; Yalcinkaya, MEHTAP

doi:10.1103/physrevc.93.034328

Low-lying excitations in Ni-72

MORALES A. I., BENZONI G., WATANABE H., NISHIMURA S., BROWNE F., Daido R., ...Daha Fazla

PHYSICAL REVIEW C, cilt.93, sa.3, 2016 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 93 Sayı: 3
Basım Tarihi: 2016
Doi Numarası: 10.1103/physrevc.93.034328
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
İstanbul Üniversitesi Adresli: Evet

Özet

Low-lying excited states in Ni-72 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 beta decay from Co-72 to Ni-72, and has provided first experimental information on the decay sequence Fe-72 -> Co-72 -> Ni-72 and on the delayed neutron-emission branch Co-73 -> Ni-72. Accordingly, we report nearly 60 previously unobserved gamma transitions which deexcite 21 new levels in Ni-72. 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 beta-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.