质子发射体（141）Ho中的转动带

Rotational bands in the proton emitter (141)Ho.

作者信息

Seweryniak D, Woods P J, Ressler J J, Davids C N, Heinz A, Sonzogni A A, Uusitalo J, Walters W B, Caggiano J A, Carpenter M P, Cizewski J A, Davinson T, Ding K Y, Fotiades N, Garg U, Janssens R V, Khoo T L, Kondev F G, Lauritsen T, Lister C J, Reiter P, Shergur J, Wiedenhöver I

机构信息

Argonne National Laboratory, Illinois 60439, USA.

出版信息

Phys Rev Lett. 2001 Feb 19;86(8):1458-61. doi: 10.1103/PhysRevLett.86.1458.

DOI:10.1103/PhysRevLett.86.1458

PMID:11290167

Abstract

Rotational bands feeding the ground state and the isomeric state in the proton emitter (141)Ho were observed using the recoil-decay tagging method. This constitutes direct evidence that (141)Ho is deformed. A quadrupole deformation of beta(2) = 0.25(4) was deduced for the ground state from the extracted dynamic moment of inertia. Based on observed band crossings and signature splittings the 7/2(-)[523] and 1/2(+)[411] configurations were proposed for the ground state and the isomeric state, respectively. Comparison with particle-rotor calculations for beta(2) = 0.25 indicates, however, that (141)Ho may have significant hexadecapole deformation and could be triaxial in the 7/2(-)[523] ground state.

摘要

利用反冲衰变标记法观测到了质子发射体(^{141})Ho 中馈入基态和同质异能态的转动带。这构成了(^{141})Ho 具有形变的直接证据。从提取的动态转动惯量推断出基态的四极形变为(\beta_2 = 0.25(4))。基于观测到的带交叉和宇称劈裂，分别为基态和同质异能态提出了(7/2^-[523])和(1/2^+[411])组态。然而，与(\beta_2 = 0.25)的粒子转子计算结果比较表明，(^{141})Ho 在(7/2^-[523])基态可能具有显著的十六极形变并且可能是三轴的。