Fine structure of ²¹¹Bi α-decay from Coriolis coupling

Horia Hulubei National Institute for Physics and Nuclear Engineering - P.O. Box MG-6, Bucharest-Magurele, Romania, Academy of Romanian Scientists - Splaiul Independentei 54, 050094, Bucharest, Romania and Faculty of Physics, University of Bucharest - Atomistilor Street 405, Bucharest-Magurele, Romania

Received: 13 August 2018
Accepted: 4 October 2018

Abstract

The α-decay is considered as a superasymmetric fission process. A fragmentation path is obtained by mean of the least action principle in a configuration space spanned by five degrees of freedom. The potential barrier is obtained within the macroscopic-microscopic model while the effective mass and the momentum of inertia within the cranking approach. The single-particle wave functions and the single-particle energies are supplied by the Woods-Saxon two-center shell model. The fine structure of ²¹¹Bi α-decay is treated within a set of generalized time-dependent pairing equations that takes into account the Landau-Zener effect and the Coriolis coupling. A low value of the internuclear collective velocity was used. The theoretical results showed a good agreement with the experimental data. Essentially, in the framework of the formalism, the fine structure for the ²¹¹Bi is due to the occurrence of the Coriolis coupling.