The influence of intruder states in even-even Po isotopes

TL;DR

This paper investigates how intruder states and shape coexistence influence the structure of even-even Po isotopes using an interacting boson model with configuration mixing, revealing similarities with Pt isotopes and differences from Pb and Hg isotopes.

Contribution

It provides a detailed analysis of shape coexistence and intruder states in Po isotopes, highlighting their behavior and systematics through a configuration mixing model.

Findings

Shape coexistence in Po isotopes is similar to Pt isotopes.

Intruder states are present but hidden in Po isotopes.

Behavior differs from Pb and Hg isotopes.

Abstract

We study the role of intruder states and shape coexistence in the even-even $^{190-206}$Po isotopes, through an interacting boson model with configuration mixing calculation. We analyzed the results in the light of known systematics on various observable in the Pb region, paying special attention to the unperturbed energy systematics and quadrupole deformation. We find that shape coexistence in the Po isotopes behaves in very much the same way as in the Pt isotopes, i.e., it is somehow hidden, contrary to the situation in the Pb and the Hg isotopes.