arXiv:1907.00398·v1·Nuclear Theory
Low Energy Magnetic Radiation (LEMAR ) of Warm Nuclei
S. Frauendorf · B. A. Brown · R. Schwengner
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.