Two-neutron transfer reactions and shape phase transitions in the microscopically-formulated interacting boson model

Abstract

Two-neutron transfer reactions are studied within the interacting boson model based on the nuclear energy density functional theory. Constrained self-consistent mean-field calculations with the Skyrme energy density functional are performed to provide microscopic input to completely determine the Hamiltonian of the IBM. Spectroscopic properties are calculated only from the nucleonic degrees of freedom. This method is applied to study the $(t,p)$ and $(p,t)$ transfer reactions in the assorted set of rare-earth nuclei ${}^{146-158}$Sm, ${}^{148-160}$Gd, and ${}^{150-162}$Dy, where spherical-to-axially-deformed shape phase transition is suggested to occur at the neutron number $N\approx 90$. The results are compared with those from the purely phenomenological IBM calculations, as well as with the available experimental data. The calculated $(t,p)$ and $(p,t)$ transfer reaction intensities, from both the microscopic and phenomenological IBM frameworks, signal the rapid nuclear structural change at particular nucleon numbers.

arXiv comment12 pages, 12 figures, 2 tables

References in corpus (2)

• Quantum phase transitions in the interacting boson model
• Microscopic Formulation of Interacting Boson Model for Rotational Nuclei

Cited by in corpus (7)

• Shape coexistence in even-even nuclei: A theoretical overview
• The nucleon-pair approximation for nuclei from spherical to deformed regions
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• Quadrupole and octupole states in ${}^{152}$Sm using the proton-neutron interacting boson model
• Octupole correlation effects on two-neutron transfer intensity in rare-earth nuclei
• Octupole correlations in the excited $0^{+}$ states and two-neutron transfers in actinide nuclei