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Decay of 32.2 min 138 Cs to 138 Ba

1970; Physical Society of Japan; Volume: 28; Issue: 2 Linguagem: Inglês

10.1143/jpsj.28.283

1347-4073

Teruaki Nagahara, Nobuyoshi Miyaji, H. Kurihara, Yukiko Mizuno, Y. Ishizuka,

Nuclear Physics and Applications

The decay of 138 Cs to levels in 138 Ba has been studied with Ge(Li) detectors and Ge(Li)-NaI(Tl) coincidence spectrometer. On the basis of the singles and coincidence measurements, 33 gamma-ray transitions were observed. Thirty-one transitions except for the 773 and 1555 keV gamma rays are place in a level scheme of 138 Ba consisting of the levels at 1436.0, 1898.5, 2217.6, 2306.8, 2442.7, 2445.1, 2582.8, 2639.8, 2681.8, 2881, 3051, 3339.7, 3368.1, 3560.5, 3643, 3858, 3922, 4166.9 and 4241.8 keV. A new level at 3368.1 keV that has not been observed by the 138 Ba( p , p '), 137 Ba( d , p ) and 137 Ba( n , γ) experiments are proposed in the present work. The existence of collective 3 - state at 2881 keV was also confirmed from decay of 138 Cs. The results are compared with those of the previous studies.