Excited states of 134Ba

Abstract

The radiations accompanying the decay of 6.5 min 134La have been studied with a Gerholm magnetic lens type beta-ray spectrometer and with a 3 mm thick Ge(Li) gamma-ray spectrometer. Scintillation spectrometers were used for beta-gamma and gamma-gamma coincidence experiments. For the gamma rays from 134La the energies in keV and relative intensities in percent of decays are 563 (0.5%), 605 (7.4%), 1167 (0.2%), 1424 (0.3%), 1554 (0.7%), 1730 (0.4%), 1957 (0.1%), 1991 (0.1%), and 2081 (0.08%). The following levels of 134Ba are populated (energies in keV given together with estimated log ft values for feeding in the decay of 1 + 134La): ground state (4.8), 605 (5.7), 1168 (6.5), 2159 (5.7), 2335 (5.9), [2562] (6.3), 2594 (5.7), 2686 (6.3). No evidence is found for the existence of a 0 + member of a possible second excited state vibrational triplet.