19/2- G-factor In K-39 Using A Transient Field-fusion Reaction Technique

The magnetic moment of the 19/2- state in K-39 has been measured by the transient field technique. The state was excited by the inverse reaction C-12(S-32,p-alpha)K-39 and the recoil nucleus traversed a thin Gd foil. Its absolute g factor, g = 0.35(3), was obtained by an internal calibration, which makes use of the magnetic moment of the 15/2+ state in Ca-41 also excited in the same reaction. A mean g factor for the states 3-, 5- in Ar-36, g = 0.52(6), determined in a simultaneous measurement is consistent with the self-conjugate nature of the nucleus, giving further support to the validity of the field calibration. The experimental result agrees with shell-model predictions.