Improved Gamma-Ray Energies for the Decay of ¹²⁹Cs

Abstract

The gamma rays accompanying the decay of 32-hr ¹²⁹Cs have been studied with a 25 cm³ Ge(Li) spectrometer. Transition energies have been determined with improved precision and internal consistency. Levels in ¹²⁹Xe were confirmed at 39.58±0.05, 318.4±0.1, 321.9±0.2, 411.7±0.2, 588.7±0.1, 903.8±0.8 and 946.0±0.2 keV.