Nicholas Stone

Abstract:

Following Coulomb excitation of the radioactive ion beam (RIB) 132Te at HRIBF we report the first use of the recoil-in-vacuum (RIV) method to determine the g factor of the 2(+)(1) state: g(973.9 keV 2(+) 132Te) = (+)0.35(5). The advantages offered by the RIV method in the context of RIBs and modern detector arrays are discussed.

Abstract:

Following Coulomb excitation of the radioactive ion beam (RIB) Te-132 at HRIBF, we report the first use of the recoil-in-vacuum (RIV) method to determine the g-factor of the 2(1)(+) state to be (+)0.35(5). The advantages offered by the RIV method in the context of RIBs and modern detector arrays are discussed.

Abstract:

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.