Delayed or absent pi(h(11/2))(2) alignment in Xe-111

Capponi, L.; Smith, J.; Ruotsalainen, P.; Scholey, C.; Rahkila, P.; Bianco, L.; Boston, A.; Boston, H.; Cullen, D.; Derkx, X.; Drummond, M.; Grahn, T.; Greenlees, P.; Grocutt, L.; Hadinia, B.; Jakobsson, U.; Joss, D.; Julin, R.; Juutinen, S.; Labiche, M.; Leino, M.; Leach, K.; McPeake, C.; Mulholland, K.; Nieminen, P.; O'Donnell, D.; Pa, E.; Peura, P.; Sandzelius, M.; Saren, J.; Saygi, BAHADIR; Sorri, J.; Stolze, S.; Thornthwaite, A.; Taylor, M.; Uusitalo, J.

doi:10.1103/physrevc.101.014313

Delayed or absent pi(h(11/2))(2) alignment in Xe-111

Atıf İçin Kopyala

Capponi L., Smith J. F., Ruotsalainen P., Scholey C., Rahkila P., Bianco L., ...Daha Fazla

PHYSICAL REVIEW C, cilt.101, sa.1, 2020 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 101 Sayı: 1
Basım Tarihi: 2020
Doi Numarası: 10.1103/physrevc.101.014313
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, INSPEC
Ankara Üniversitesi Adresli: Hayır

Özet

Excited states have been identified in the very neutron-deficient N = Z + 3 nucleus Xe-111 for the first time, using the Ni-58(Ni-58, alpha n) heavy-ion fusion-evaporation reaction. gamma-ray transitions have been unambiguously assigned to Xe-111 by correlation with the characteristic Xe-111 -> Te-107 -> Sn-103 alpha-decay chain using the method of recoil-decay tagging. Inspection of gamma gamma-coincidence data has shown that five of the transitions form a rotational-like sequence. Excitation-energy systematics suggest that the sequence could be the favored signature partner of a band built on an h(11/2) neutron. Aligned angular momenta of states in the band have been compared to analogous bands in neighboring xenon isotopes. The aligned angular momenta for the Xe-111 band are constant over the range of observed rotational frequencies, suggesting that the first pi(h(11/2))(2) alignment is either delayed or absent. It is speculated that the alignment of h(11/2) protons in the presence of neutrons in near-identical h(11/2) orbitals may be affected by neutron-proton interactions or by the onset of octupole correlations.