Lifetime measurements in Re-166: Collective versus magnetic rotation

Li, H.; Cederwall, B.; Doncel, M.; Peng, J.; Chen, Q.; Zhang, S.; Zhao, P.; Meng, J.; Back, T.; Jakobsson, U.; Auranen, K.; Boenig, S.; Drummond, M.; Grahn, T.; Greenlees, P.; Herzan, A.; Joss, D.; Julin, R.; Juutinen, S.; Konki, J.; Kroell, T.; Leino, M.; McPeake, C.; O'Donnell, D.; Page, R.; Pakarinen, J.; Partanen, J.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Saren, J.; Saygi, BAHADIR; Scholey, C.; Sorri, J.; Stolze, S.; Taylor, M.; Thornthwaite, A.; Uusitalo, J.; Xiao, Z.

doi:10.1103/physrevc.93.034309

Lifetime measurements in Re-166: Collective versus magnetic rotation

Li H. J., Cederwall B., Doncel M., Peng J., Chen Q. B., Zhang S. Q., ...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.93.034309
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
Ankara Üniversitesi Adresli: Hayır

Özet

Lifetimes of excited states in the neutron-deficient odd-odd nucleus Re-166 have been measured for the first time using the recoil distance Doppler-shift method. The measured lifetime for the (8(-)) state; tau = 480 (80) ps, enabled an assessment of the multipolarities of the gamma rays depopulating this state. Information on electromagnetic transition strengths were deduced for the gamma-ray transitions from the (9(-)), (10(-)), and (11(-)) states, and in the case of the (10(-)) and (11(-)) states limits on the B (M1) and B(E2) strengths were estimated. The results are compared with total Routhian surface predictions and semiclassical calculations. Tilted-axis cranking calculations based on a relativistic mean-field approach (TAC-RMF) have also been performed in order to test the possibility of magnetic rotation in the 166Re nucleus. While the TAC-RMF calculations predict a quadrupole-deformed nuclear shape with similar beta(2) deformation as obtained by using the TRS model, it was found that the experimental electromagnetic transition rates are in better agreement with a collective -rotational description.