Decay of ¹⁴⁴Ce to Levels in ¹⁴⁴Pr and ¹⁴⁴Nd

Abstract

The gamma rays resulting from the decay chain of ¹⁴⁴Ce are studied using Ge(Li) and NaI(Tl) detectors in singles and as well as in coincidence. We observed indication for the existence of a week 58.5 keV gamma ray in the decay of ¹⁴⁴Ce to ¹⁴⁴Pr. In addition, four new gamma rays with energies 609.1, 1421.0, 1558.4 and 2802 keV are observed in the decay of ¹⁴⁴Pr to ¹⁴⁴Nd. Therefore in ¹⁴⁴Nd, new levels at 2118 and 2802 keV are proposed. The intensities of all the gamma rays observed are also reported.