A simple approach to the chaos-order contributions in nuclear spectra
A.G. Magner, A.I. Levon, and S.V. Radionov
TL;DR
This paper introduces a simple one-parameter distribution to analyze nuclear spectra, revealing how symmetry breaking influences the transition from order to chaos in nuclear quantum states.
Contribution
A new one-parameter NNSD derived from the Wigner-Dyson approach provides detailed insights into chaos and order contributions in nuclear spectra.
Findings
Symmetry breaking enhances chaos in nuclear spectra.
The NNSD effectively distinguishes between Wigner and Poisson contributions.
The approach aligns with experimental distributions of collective states.
Abstract
The simple one-parameter nearest neighbor-spacing distribution (NNSD) is suggested for statistical analysis of nuclear spectra. This distribution is derived within the Wigner-Dyson approach in the linear approximation for the level repulsion density of quantum states. The obtained NNSD gives the individual information on the Wigner and Poisson contributions in agreement with that of the statistical experimental distributions of collective states in deformed nuclei. Using this NNSD, one finds that the symmetry breaking due to the fixing of projections of the angular momentum of collective states enhances a chaos as a shift of the NNSD from the Poisson to Wigner distribution behavior.
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