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

## TL;DR

This paper combines microscopic energy density functional theory with the interacting boson model to study two-neutron transfer reactions and shape phase transitions in rare-earth nuclei, providing insights into nuclear structural changes.

## Contribution

It introduces a method that integrates microscopic calculations into the IBM framework to analyze transfer reactions and shape phase transitions.

## Key findings

- Transfer reaction intensities indicate rapid structural changes.
- Results agree with experimental data and phenomenological models.
- Shape phase transition occurs near neutron number N≈90.

## 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.