A fast-rotating pear-shaped nucleus
Abstract
The spectroscopic studies have identified few Actinide and Lanthanide nuclei of the periodic table, which can assume the pear shape. The low frequency collective rotation of these nuclei has been established by determining the band structure of the excited levels and their gamma decay rates. In this article, we report the rotation of a pear-shaped nucleus in 100 Ru, which rotates nearly three times faster than the previously known cases. The three novel consequences of this fast rotation are: the realization of a pear-shape in an excited state, its moment of inertia becoming a constant of motion and its shape evolution. These inferences have been arrived at by comparing the characteristics of the rotational band of 100 Ru with three of the best-known examples of a rotating pear-shaped nucleus and through the theoretical interpretation of the data. The observation of a pear-shaped nucleus in the lighter mass region opens up the possibility of a systematic study of the effects of fast rotation on this shape.
Cite
@article{arxiv.2211.06037,
title = {A fast-rotating pear-shaped nucleus},
author = {A. Karmakar and P. Datta and Soumik Bhattacharya and Shabir Dar and S. Bhattacharya and G. Mukherjee and H. Pai and S. Basu and S. Nandi and S. S. Nayak and Sneha Das and R. Raut and S. S. Ghugre and R. Banik and Sajad Ali and W. Shaikh and G. Gangopadhyay and S. Chattopadhyay},
journal= {arXiv preprint arXiv:2211.06037},
year = {2022}
}