Magnetic moment measurements in osmium and platinum nuclei

Calibration of the transient field for Pt ions in gadolinium and magnetic moments of the21+states inPt

“…With the exception of the results of Ref. [8], these data are in good agreement with prior measurements, but indicate a slightly larger g factor for issPt over that of is4 iMPt. The g factors reported in Ref.…”

“…Measurements by the Rutgers group [8] on ss ssOs and is4 issPt recoiling through magnetized iron yielded g factors for the 2+& states in Os in agreement with those obtained by Mossbauer experiments, essentially verifying the Rutgers calibration [6] of the transient field. Although there was no reason to assume a dramatic variation of the transient field with Z between Os and Pt, the g factors deduced from the parametrization for the 2+* Present address: NEOCERA, 335 Paint Branch Drive, College Park, MD 02742.…”

Disparity in transient field characteristics for Au ions traversing Fe and Gd hosts through measurements ofg-factors in197Au

“…By utilizing the g-factors of the 2+ states in 184'186W and 194'196pt determined by prior investigators [2,3,16], these authors inferred the TF strengths for both W and Pt ions in Gd to be in accord with the Chalk River parameterization [17][18][19] (which also describes well the TF behaviour of ions of lower [183 and higher [-193 atomic number traversing polarized Gd). As a consequence of their study, Bazzacco et al [15] confirmed that the TF strength for Pt in Fe is anomalously low compared with that for ions of lower atomic number in that ferromagnetic host [1,[4][5][6] and, in agreement with the findings reported in our earlier work [6], further concluded that their results clearly contradicted the suggestion [7] of the Rutgers group that the g-factors of the 2[ states of the even Pt isotopes had particularly low values of ~ 0.2.…”

“…For example, while the alternative TF parameterizations considered differ in strength by about a factor of two at low velocity (,~ 2Vo), they predict precession angles (i.e., average TF strengths over the velocity interval) which differ at most by 30%. To more critically compare the transient-field behaviour for ions in this region, previously measured [6][7][8] TF strengths for WFe, OsFe, OsCo, OsNi, PtFe, and PtCo inferred from measured precession angles using independently determined g-factors are displayed in Fig. 6a as a function of the average ion velocity in the specified ferromagnetic host.…”

“…Such simultaneous measurements largely obviate possible sources of systematic errors. For the calibration of the TF strength in polarized Gd hosts, the known g-factors [8,12,13,16] of states in the even W isotopes were chosen, in preference to reliance upon the g-factors [5][6][7] of states in the even Pt nuclides which were the subject of the controversy noted above.…”