The energy levels of⁷⁹Br and⁸¹Br

Abstract

The low-lying energy level and decay schemes of the stable bromine isotopes were studied by observing the γ-rays from the (n, n′γ) reactions in a natural bromine sample with the aid of a Ge (Li) detector. A pulsed neutron source and time-of-flight methods were used to reduce background due to neutron events in the detector. Most of the γ-rays observed could be assigned to transitions in either⁷⁹Br or⁸¹Br. In addition to those levels previously known from γ-decay or Coulomb excitation experiments, several new levels were excited in each isotope.