Analytical description of the Coherent State Model for near vibrational and well deformed nuclei

TL;DR

This paper derives analytical formulas within the coherent state model to describe excitation energies and transition probabilities in near vibrational and well deformed nuclei, validated by numerical calculations and experimental data.

Contribution

It introduces simple, compact analytical formulas for energies and B(E2) values in nuclei, including signatures of phase transitions, enhancing understanding of nuclear structure.

Findings

Good agreement between calculations and experimental data.

Parameters follow regular patterns, indicating phase transition signatures.

Formulas are simple and practical for analyzing new experimental data.

Abstract

Analytical formulas for the excitation energies as well as for the electric quadrupole reduced transition probabilities in the ground, beta and gamma bands were derived within the coherent state model for the near vibrational and well deformed nuclei. Numerical calculations were performed for 42 nuclei exhibiting various symmetries and therefore with specific properties. Comparison of the calculation results with the corresponding experimental data shows a good agreement. The parameters involved in the proposed model satisfy evident regularities being interpolated by smooth curves. Few of them, which fall out of the curves, are interpreted as signatures for a critical point in a specific phase transition. This is actually supported also by the figures showing the excitation energy dependence on the angular momentum. The formulas provided for energies and B(E2) values are very simple, being written in a compact form, and therefore easy to be handled to explain the new experimental data.