Exploring Intruder Levels of Nuclei (96Zr, 98Zr, 98MO) Within the Framework of IBM-2 Model

TL;DR

This paper investigates rare intruder nuclear levels in specific nuclei using the IBM-2 model, showing good agreement with experimental data and highlighting the role of double subshell closures in these anomalies.

Contribution

It applies the IBM-2 model to analyze intruder levels in Zr and Mo nuclei, providing new insights into their structure and transition properties.

Findings

Good agreement between theoretical and experimental data.

Intruder levels linked to double subshell closures.

Electric and magnetic transition values are consistent with experiments.

Abstract

Current work includes a study of the very rare case called intruder nuclear levels, where there are only seven nuclei in nature. Such cases occur when the first excited state is . The current study included only three nuclei: . The nuclear model used to explore and investigate nuclei in this work is the second interacting boson. The experimental data and theoretical values obtained were in good agreement, indicating this model's success in calculating such anomalies. The main reason for the presence of these levels in other than their natural locations expected according to the IBM model is that they have a double subshell closure. The values of the electric quadrupole transitions, magnetic dipole transitions and zero transitions estimated were in acceptable agreement with experimental data.