gamma-vibrational states in superheavy nuclei

TL;DR

This paper predicts gamma-vibrational states in superheavy nuclei using a microscopic model, highlighting their collective nature and providing detailed transition probabilities for isotopes of Fermium, Nobelium, and Darmstadtium.

Contribution

It introduces a microscopic Triaxial Projected Shell Model analysis to predict gamma-vibrational states and transition probabilities in superheavy nuclei, advancing understanding of their collective excitations.

Findings

Gamma-vibrational states are predicted as low-energy excitations in superheavy nuclei.

The model provides specific E2 transition probabilities for selected isotopes.

Results suggest collective vibrations are significant in superheavy nuclear structure.

Abstract

Recent experimental advances have made it possible to study excited structure in superheavy nuclei. The observed states have often been interpreted as quasi-particle excitations. We show that in superheavy nuclei collective vibrations systematically appear as low-energy excitation modes. By using the microscopic Triaxial Projected Shell Model, we make a detailed prediction on gamma-vibrational states and their E2 transition probabilities to the ground state band in Fermium and Nobelium isotopes where active structure research is going on, and in 270Ds, the heaviest isotope where decay data have been obtained for the ground-state and for an isomeric state.