Resonance Scattering of Nickel CaptureγRays from a Natural Tellurium Target

Abstract

The complex spectrum of resonantly scattered nickel neutron-capture $\gamma$ rays from a natural tellurium target is shown to be predominantly associated with transitions from a 7.538-MeV excited level in ${}_{}{}^{130}{}_{}{}^{}\mathrm{Te}$ to several low-lying levels. The experiments were performed at a tangential-beam-tube facility of the IRR-2 reactor, using a nickel source placed adjacent to the reactor core. A large-volume lithium-drifted germanium detector was used to measure the $\gamma$ spectrum. Coincidence measurements were performed using two sodium iodide crystals.