Constant temperature description of the nuclear level densities

TL;DR

This paper introduces a constant temperature model for describing spin and parity dependent nuclear level densities, enhancing the accuracy and versatility of nuclear reaction calculations relevant to astrophysics and energy.

Contribution

It proposes a novel constant temperature parametrization for shell model nuclear level densities, improving their application in reaction rate calculations.

Findings

The constant temperature model effectively describes low-lying nuclear states.

It reveals the influence of symmetries on nuclear state temperatures.

The approach is more adaptable for practical applications.

Abstract

The spin and parity dependent nuclear level densities (NLD) are calculated for medium-heavy nuclei using shell model techniques. The NLD are used to calculate cross sections and reaction rates of interest for nuclear astrophysics and nuclear energy applications. We investigate a new approach of describing the shell model NLD via a constant temperature parametrization. This approach provides new information about the effects of symmetries on the temperature of the low-lying nuclear states, and it is shown to be more versatile for applications.