NEUTRON CAPTURE GAMMA RAYS FROM LITHIUM, BORON, AND NITROGEN

Abstract

The neutron capture γ-rays from Li⁷, B¹¹, and N¹⁵ have been studied. In Li⁷ γ-rays are observed at 7.26 ± 0.03 Mev. and 6.78 ± 0.05 Mev. In B¹¹ six γ-rays are detected. The spectrum is consistent with J = 7/2 + for the capturing state. In N¹⁵ six previously unreported γ-rays are detected. Estimates of thermal neutron radiative capture cross sections are: Li⁶, 0.028 ± 0.008 b.; B¹⁰, 0.5 ± 0.2 b.; and N¹⁴, 0.08 ± 0.02 b.