Low-energy behavior of $E2$ strength functions

TL;DR

This paper investigates the low-energy behavior of E2 strength functions in molybdenum isotopes, revealing discrepancies with existing phenomenological models used in reaction rate calculations.

Contribution

It provides shell model calculations of E2 strength functions for $^{94}$Mo and $^{95}$Mo, highlighting differences from standard phenomenological approximations.

Findings

Strength functions differ from RIPL-3 models

Shell model calculations offer new insights

Implications for reaction rate predictions

Abstract

Electric quadrupole strength functions have been deduced from averages of a large number of $E2$ transition strengths calculated within the shell model for the nuclides $^{94}$Mo and $^{95}$Mo. These strength functions are at variance with phenomenological approximations as provided by the Reference Input Parameter Library RIPL-3 for calculations of reaction rates on the basis of the statistical model.