Quadrupole Moments Of Isomers Research Articles

Quadrupole moments of isomers in the A=90 region and the tilted-foil polarization of a separated reaction-product beam.

The quadrupole interaction of polarized $^{92}\mathrm{Mo}$(${8}^{+}$,\ensuremath{\tau}=0.29 \ensuremath{\mu}s) and $^{93}\mathrm{Ru}$(21/${2}^{+}$,\ensuremath{\tau}=3.5 \ensuremath{\mu}s) isomers in a single crystal of Zr has been measured. The experiment utilizes the nuclear polarization induced by the tilted-multifoil interaction with separated isomer beams from a mass spectrometer. The magnitudes and signs of the quadrupole moments were deduced to be -0.33 and +0.04 b for $^{92}\mathrm{Mo}$(${8}^{+}$) and $^{93}\mathrm{Ru}$ (21/${2}^{+}$), respectively. Together with previous work on the $^{88,90}\mathrm{Zr}$(${8}^{+}$) isomers, this experiment sheds light on the particle-hole shell-model structure in the A=90 region. It also serves as a calibration of a recent experiment on parity mixing in the 17/${2}^{\mathrm{\ensuremath{-}}}$-17/${2}^{+}$ doublet in $^{93}\mathrm{Tc}$. The induced nuclear polarization under the conditions of a separated reaction-product beam is found to be substantially higher than in previous in-beam experiments.

Electromagnetic moments of isomers in 144, 146, 147, 148Gd in the deformed independent particle model

Recently measured gyromagnetic ratios and quadrupole moments of isomers in 144, 146, 147, 148Gd are well reproduced by the deformed independent particle model, provided that the spherical single particle energies are chosen in accordance with the empirical evidence from single particle stripping and pick-up data.

Quadrupole moments of [formula omitted] states in Sn-isotopes and electric field gradients at the Sn and Cd sites in Cd, Sn and Sb metal

Quadrupole moments of high-spin neutron states in 113,114,116Sn have been determined by means of the TDPAD method. Combining our results with previous data, quadrupole moments of isomers in 118,119,120Sn, 111Cd and a series of electric field gradients at the Sn or Cd site in various materials can be derived.