Spin and parity assignments forMo94,95neutron resonances

Abstract

The $\ensuremath{\gamma}$ rays following the $^{94,95}\mathrm{Mo}$$(n,\ensuremath{\gamma})$ reactions were measured as a function of incident neutron energy by the time-of-flight method with the DANCE (Detector for Advanced Neutron Capture Experiments) array of 160 ${\mathrm{BaF}}_{2}$ scintillation detectors at the Los Alamos Neutron Science Center. The targets were enriched samples: 91.59% $^{94}\mathrm{Mo}$ and 96.47% $^{95}\mathrm{Mo}$. The $\ensuremath{\gamma}$-ray multiplicities and energy spectra for different multiplicities were measured in $s$- and $p$-wave resonances up to ${E}_{n}=10$ keV for $^{94}\mathrm{Mo}$ and up to ${E}_{n}=2$ keV for $^{95}\mathrm{Mo}$. Definite spins and parities were assigned in $^{96}\mathrm{Mo}$ for about 60% of the resonances, and tentative spins and parities were assigned for the remaining resonances. In $^{95}\mathrm{Mo}$ the parities were determined for the observed resonances, confirming previously known assignments.