Large transient magnetic fields for rare-earth ions recoiling in gadolinium and g-factors of high-spin states in 156, 158, 160Gd

Perturbed angular correlations for Gd in gadolinium: In-beam comparisons of relative magnetizations

“…Measurements similar to the present work were performed by Skaali et al [1], and Kalish et al [3]. Additional complementary information was also obtained by Häusser et al [6]. In these previous works, however, the focus was on the precessions of the 4 While the interpretation of the hyperfine interactions in terms of the relative magnetization of different samples turns out to be rather straight-forward, there are several additional phenomena associated with the hyperfine fields and the ion-implantation process that may have bearing on the interpretation of the data.…”

“…In the present work the Mössbauer values at 4.2 K will be taken as the point of reference. The sign of the static magnetic field has been determined to be negative, for example from in-beam perturbed angular correlation measurements [1,3,6].…”

“…Thus the net perturbation of the nuclear spin distribution has contributions from both the transient and static hyperfine magnetic fields. For states of spin 4 + and higher in the ground-state band, the electric quadrupole interaction can be ignored (see below and [6]) and the perturbation of the angular correlation is manifested essentially as a rotation through the angle…”

“…Gadolinium foils are used extensively for in-beam measurements of hyperfine interactions and nuclear moments [1,2,3,4,5,6,7,8,9,10,11,12,13]. Magnetized gadolinium foils are used in preference to iron foils in many applications of the transient-field technique [5,13] to measure nuclear g factors because larger perturbations of the particle-γ correlations can be obtained under otherwise similar experimental conditions [6,7].…”

“…Magnetized gadolinium foils are used in preference to iron foils in many applications of the transient-field technique [5,13] to measure nuclear g factors because larger perturbations of the particle-γ correlations can be obtained under otherwise similar experimental conditions [6,7]. One disadvantage of gadolinium hosts, however, is that the magnetization is not well controlled, being sensitive to the crystalline structure of the foil, and varying considerably with both the applied field and the temperature, even at temperatures well below the Curie temperature of 293 K [14].…”