New determination of the Nuclear Quadrupole Moments of In isotopes

Abstract

We present here a new determination of the quadrupole moment Q of hyperfine-probe-nuclei states of three different In isotopes: the 5+ 192 keV excited state of 114In (probe for Nuclear Orientation experiments), the 9/2+ ground state of 115In (Nuclear Magnetic and Nuclear Quadrupole Resonance probe) and the 3/2+ 659 keV excited state of 117In (Perturbed-Angular-Correlations probe). These nuclear quadrupole values were determined by comparing experimental nuclear-quadrupole frequencies with the electric-field-gradient tensor (EFG) calculated at In sites in metallic Indium within the Density-Functional Theory. These accurate ab initio calculations were performed with the WIEN97.10 implemenattion of the Full-Potential Linearized-Augmented Plane-Wave method. The obtained results for the quadrupole moments [Q(114In) = -0.14(1) b; Q(115In) = -0.77(1) b; Q(117In) = 0.59(1) b] are in clear discrepancy with those reported in the literature [Q(114In) = +0.14(6) b; Q(115In) = +0.861(45) b; Q(117In) = 0.64(4) b].