On the hyperfine anomaly in Eu isotopes

TL;DR

This paper introduces a novel method to determine the hyperfine anomaly in Eu isotopes without prior knowledge of nuclear magnetic moments, utilizing experimental data and theoretical calculations to enhance understanding of nuclear structure.

Contribution

It presents the first application of a new method for measuring hyperfine anomalies in unstable isotopes, supported by particle-rotor model calculations and comparisons with existing theories.

Findings

Hyperfine anomaly determined for multiple unstable Eu isotopes

Good agreement between experimental data and particle-rotor calculations

Comparison with Moskowitz-Lombardi formula highlights model accuracy

Abstract

A new method for determining the hyperfine anomaly, without knowing the nuclear magnetic moment, is used for the first time on a series of unstable isotopes. The relative large number of experimental data in Eu makes it possible to determine the hyperfine anomaly for a number of unstable isotopes. Calculations of the Bohr-Weisskopf effect and hence the hyperfine anomaly has been performed using the particle-rotor formalism. The result from the calculations and experiments is compared with other theoretical calculations and the empirical Moskowitz-Lombardi formula.