Resonance Scattering of Nickel CaptureγRays from a Natural Tellurium Target

Abstract

The complex spectrum of resonantly scattered nickel neutron-capture y rays from a natural tellurium target is shown to be predominantly associated with transitions from a 7.538-MeV excited level in 180 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 y spectrum. Coincidence measurements were performed using two sodium iodide crystals.

Decay of 5.7-minutes and 40-minutes 180Sb Isomers to Levels in 180Te

“…Fig. 6 nuclear excitation studies [19][20][21][22][23]. No β feeding was found to this level in the decay of either isomers.…”