Methods for G-Factor Measurements on Short-Lived Excited States Using Radioactive Beams

Complications which arise when the Transient Field method for determination of nuclear excited state g-factors is used with radioactive isotope beams, are surveyed. Ways to overcome the problems include allowing the Coulomb excited nuclei to recoil into vacuum. This has the disadvantage that the angular distribution of their gamma de-excitation, which forms the basis for the TF method, becomes attenuated. However it is argued that these attenuations may, in themselves, form the basis of a simple way to study g-factors. A simple theoretical introduction is given and recent preparatory experiments are outlined.