Decoupling behavior in La-132

作者：Kumar Vinod^*; Das Pragya; Lakshmi S; Joshi P K; Jain H C; Singh R P; Kumar R; Muralithar S; Bhowmik R K

来源：Physical Review C, 2010, 82(5): 054302.

DOI：10.1103/PhysRevC.82.054302

Heavy-ion fusion reactions Sn-122(N-14,N-15, xn)La-132 have been utilized for the lifetime measurements using the recoil distance method. The lifetimes of seven low-lying excited states were obtained. In addition, the lifetimes of two states belonging to a band, which was identified as a decoupled band, were obtained. The decoupling behavior in La-132 has been theoretically investigated using the particle-rotor model in the model space of pi h(11/2) and (nu s(1/2), nu d(3/2)). The pseudospin coupling model was also utilized to understand the decoupling behavior in terms of the valence-particle configuration pi h(11/2)(Omega(pi) = 1/2) circle times nu[(411) over tilde](Omega(nu) = 1/2, 3/2), and a reasonable agreement with the experiment was obtained.

• 出版日期2010-11-4