Type II shell evolution in A=70 isobars from the N >= 40 island of inversion

MORALES, A.; BENZONI, G.; WATANABE, H.; TSUNODA, Y.; OTSUKA, T.; NISHIMURA, S.; BROWNE, F.; Daido, R.; DOORNENBAL, P.; Fang, Y.; LORUSSO, G.; PATEL, Z.; RICE, S.; SINCLAIR, L.; SODERSTROM, P.; 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-HOYBJOR, V.; MOMIYAMA, S.; NAPOLI, D.; NIIKURA, M.; ORLANDI, R.; SAKURAI, H.; SAHIN, E.; SOHLER, D.; SCHAFFNER, H.; TANIUCHI, R.; TAPROGGE, J.; VAJTA, Zs.; VALIENTE-DOBON, J.; WIELAND, O.; Yalcinkaya, MEHTAP

doi:10.1016/j.physletb.2016.12.025

Type II shell evolution in A=70 isobars from the N >= 40 island of inversion

MORALES A. I., BENZONI G., WATANABE H., TSUNODA Y., OTSUKA T., NISHIMURA S., ...Daha Fazla

PHYSICS LETTERS B, cilt.765, ss.328-333, 2017 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 765
Basım Tarihi: 2017
Doi Numarası: 10.1016/j.physletb.2016.12.025
Dergi Adı: PHYSICS LETTERS B
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.328-333
İstanbul Üniversitesi Adresli: Evet

Özet

The level structures of Co-70 and Ni-70, populated from the Chi decay of Fe-70, have been investigated using beta-delayed gamma-ray spectroscopy following in-flight fission of a U-238 beam. The experimental results are compared to Monte-Carlo Shell-Model calculations including the pf + g(9/2) + d(5/2) orbitals. The strong population of a (1(+)) state at 274 keV in Co-70 is at variance with the expected excitation energy of 1 MeV from near spherical single-particle estimates. This observation indicates a dominance of prolate deformed intruder configurations in the low-lying levels, which coexist with the normal near spherical states. It is shown that the 13 decay of the neutron-rich A = 70 isobars from the new island of inversion to the Z = 28 closed-shell regime progresses in accordance with a newly reported type of shell evolution, the so-called Type II, which involves many particle-hole excitations across energy gaps. (C) 2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license.