gFactor of theJπ=25+2

Abstract

The nuclear gyromagnetic ratio of the 3291-keV J 17 = ~+ 205 Tl level has been measured with use of y-ray perturbed angular distribution techniques with the result g = 0.544 ± 0.008. The state was populated with the reaction 204 Hg(£>2n ) 205 Tl. With use of the known quantities ^( 206 Pb 7"; E x = 2200 keV) and g( m Bi | + ?E X = 0 keV) the proton orbital magnetic g factor for the lh orbital was deduced to be g t = 1.115± 0.02. This result has been corrected for wave-function admixtures and core polarization effects.An isovector M6 transition is observed for the first time in a (p,n) reaction. A prominent peak was seen at E x = 5.545 ± 0.025 MeV in 24 A1 in the study of the reaction u Mg(p, w) 24 Al at E p = 35 MeV. This state is interpreted as the "stretched" particle-hole state with J n -6", T = 1, which corresponds to the 15.13-MeV state in 24 Mg. Distorted-wave Born approximation analysis gives a result consistent with those for (p ,p') and (e 9 e') reactions, indicating that at least 50% of the isovector M6 strength is missing.

Investigation of196,198Pt and202,204Hg with the (d, pn?) reaction

“…The numbers shown as "relative population" were obtained from the intensities of the ground state transitions. The relevant experimental information was taken from the literature Fll, [15][16][17][18][19] and the present work. Unfortunately the necessary experimental information is not available for 2~ which could be populated in the (d, p2n) reaction at Ed> 15 MeV.…”

Hyperfine anomaly in gold and magnetic moments of Iπ=11/2− gold isomers

“…Along with the values for gold isomers deter- mined in the present work, the experimental data for iridium ( [44][45][46] and references therein), europium [47], holmium [48], thulium [49], gadolinium [50], and thallium [51] are shown. In the cases of 144 Gd and 205 Tl, g(π h 11/2 ) values were derived from the measured g factors for I π = 10 + (h 11/2 ) 2 and I π = 25/2 + (7 − ⊗ h 11/2 ) states, respectively [50,51]. Thus, we have unique systematics of the single-particle g factors, spanning the whole range between the magic neutron numbers, N = 82 and N = 126.…”

“…For such a wide range of proton number (from Z = 64 to Z = 81), the g(π h 11/2 ) values display a very regular N dependence: Starting from the maximal value at the magic number N = 82, it steeply decreases with the increase of N, approaching a constant value at N > 110. The value for 205 Tl demonstrates an increase to higher values, similar to those close to N = 82, although the g factor for the π h 11/2 state in 205 Tl was deduced by the additivity relation rather than measured directly [51].…”

Gyromagnetic ratios of excited states and nuclear structure near 132Sn

“…Maier et al [18] were able to deduce δ g l = 0.115 ± 0.02 for the πh 11/2 hole. From a global fit to moment data, a value of δ g l = 0.09 had previously been proposed for "all" orbits [19] near 208 Pb.…”