The nuclear magnetic moment of "Ir and the directional distribution of gamma rays in "Os
Angular distributions of gamma transitions between levels in I9OOs fed in the decay of I9'Ir aligned in a rhenium single crystal have been measured at temperatures down to 2 mK. Multipole mixing ratios in both gamma and electron-capture transitions are deduced and compared with various nuclear models. The angular distribution coefficients are applied to interpret very small anisotropies observed when I9'Ir is polarised in an iron host matrix, cooled to 2.5 mK. The deduced magnetic dipole moment of the 4 + ground state of I9'Ir is Ip(I9'Ir; GS)~ = 0.04( l)pN. Possible single-particle descriptions compatible with this result are suggested. NUCLEAR MOMENTS: I9'Ir (from Re(a, n)): measured I,(@ from oriented nuclei in single crystal Re and polycrystalline Fe: deduced I9OOs S(E2/M1), Jp in electron capture, lpl(1901r ground state).
Solid-angle correction factors for five-sided coaxial Ge(Li) detectors
Abstract A previous method for the calculation of solid-angle correction factors of coaxial Ge(Li) detectors is extended to “five-sided” coaxial detectors, and typical results are presented.
NUCLEAR SPECTROSCOPY OF NEUTRON-DEFICIENT RARE EARTHS (Tb THROUGH HF)
A survey has been made of electron-capturing nuclides produced by irradiating rare earths (Gd through Hf) of various isotopic enrichments with 22- Mev protons. Ionexchange chemistry was performed, conversion-electron spectra were analyzed, and the various activities were cataloged. At least ten new activities, Tb/sup 153/, Tb/sup 155/, Tb/sup 156m/ 162/, Er/sup 168m/, Yb/sup 171m/, and L/sup 169/, were found and studied. Eighteen previously known activities also were examined. Multipolarities consistent with the observed conversion electron intensity ratios are proposed. The positions of levels of even-even nuclei as a function of both proton and neutron number are discussed. (auth) ABSTRACTS