gfactors of92−and232+isomeric states in

Anomalous magnetic moment at Ba in Au

“…This shows that the Ba ions occupy the unique sites and the distortion of the surrounding lattice is negligible to give any modulation of the spin rotation spectra due to quadrupolar interaction. Comparing our results of Ba in Au with Ba in Fe [10], we infer that the nearest neighbor environment of the impurity is unperturbed by radiation damage because the probability for the formation of near-neighbor vacancy is very small. Most probably, the Ba ions are in the substitutional sites [16].…”

“…Motivated by this aspect, recently, we have measured the hyperfine magnetic field at Ba in Fe for the g-factor measurements of the 173 keV, 9 2 À (T 1/2 = 16(2) ns, g ¼ À0:192ð6Þ) and 473 keV, 23 2 þ (T 1/2 = 47(2) ns, g ¼ À0:233 (7)) isomeric states in 129 Ba [10] using the TDPAD method. The measured magnetic hyperfine field À6.0(2) T at 129 Ba in Fe follows theoretical predictions for the ions at substitutional sites [11].…”

g-factor of the 7−isomeric state in128Ba

“…After rolling it to the desired thickness, the 99.99% pure iron foil was annealed [7], to get the saturated internal magnetic field at the recoil implanted Ba ions. Part of the same foil was used for the calibration of the internal magnetic field at Ba in Fe [5]. The target was placed between the pole tips of an electromagnet to polarize the iron foil by a 0.2 T external magnetic field perpendicular to the detector plane.…”

“…The excited 128 Ba nuclei were recoil implanted into a Fe foil to observe the perturbation of the angular distribution pattern of the de-exciting γ-rays due to magnetic interaction. The internal magnetic field, −6.0 (2) T, at Ba in iron was calibrated [5] with respect to the g-factor, −0.159 (5) …”