g factors near the first backbend in 82Sr and 84Sr

The gyromagnetic ratio is an important quantity in spectroscopic studies of deformed nuclei because its value is sensitive to proton or neutron quasiparticle admixtures in the nuclear wave-function. When the lifetimes of these states are only a few picoseconds the transient field (TF) technique seems to provide the best means of measuring their g-factors. In this method the magnetic field is experienced by the nucleus of an ion only as it moves with high velocity (≥ 0.01c) through a ferromagnet such as iron or gadolinium. Although the very short stopping times of ions in solids (∼ 1 ps) limits the duration of the field, measurable nuclear precessions of typically ΔΦ≃2° are produced which are directly proportional to the nuclear g-factor: $$\vartriangle \Phi = - \frac{{g{\mu _N}}}{\hbar }\int\limits_{{t_i}}^{{t_o}} {{B_{TF(\upsilon ){e^{ - t/\tau }}dt}}}$$ (1)