Clustering of energy levels

TL;DR

This paper observes that in single j-shell calculations, specific odd-spin states in even-even nuclei and certain states in odd-odd nuclei tend to cluster within narrow energy bands, indicating a pattern in nuclear energy levels.

Contribution

It highlights a pattern of energy level clustering in nuclear shell model calculations, providing insights into nuclear structure.

Findings

Odd-spin states in even-even nuclei cluster in narrow energy bands.

Certain states in odd-odd nuclei also exhibit clustering.

Pattern suggests underlying structural regularities.

Abstract

It is noted that in single j-shell calculations certain odd-spin states in even--even nuclei lie in a narrow energy band; likewise certain states in odd--odd nuclei.