Velocity dependence of transient hyperfine field at Pt ions rapidly recoiling through magnetized Fe

Abstract

The velocity dependence of the transient hyperfine magnetic field acting at nuclei of Pt196 ions rapidly recoiling through thin magnetized Fe was investigated at a number of recoil velocities. The state of interest (21+) was populated by Coulomb excitation using beams of 80- and 120-MeV S32 and 150- and 220-MeV Ni58 ions. The 2101+ -ray angular distribution precession measurements were carried out in coincidence with backscattered projectiles. From these results, the strength of the transient field acting on Pt ions recoiling through magnetized Fe with average velocities in the extended range 2.144.82 (v0=c137) was found to be consistent with a linear velocity dependence and to be incompatib..