# Low Energy Magnetic Radiation (LEMAR ) of Warm Nuclei

## TL;DR

This paper explains the low-energy enhancement in nuclear radiative strength functions near closed shells as M1 transitions, and describes a bimodal structure in open-shell nuclei caused by orbital realignment.

## Contribution

It provides a shell model explanation for low-energy enhancements and bimodal structures in nuclear radiative strength functions, highlighting the role of orbital realignment.

## Key findings

- Enhancement below 2 MeV explained by M1 transitions.
- Bimodal structure includes zero energy spike and scissors resonance.
- Features linked to realignment of high-j orbitals.

## Abstract

The enhancement observed below 2 MeV in the radiative strength function of nuclei near closed shells is explained by shell model calculations as M1 transitions between excited states. In the open-shell a change to a bimodal structure composed of the zero energy spike and a scissors resonance is found. The features are caused by realignment of high-j orbitals.