The Decay of140La to Levels in140Ce
作者:
H. R. Saad,
H. A. Ashry,
S. A. Fares,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1989)
卷期:
Volume 25,
issue 11-12
页码: 493-498
ISSN:0021-1915
年代: 1989
DOI:10.1080/10256018908624196
出版商: Taylor & Francis Group
关键词: cerium 140;decay;energy levels;gamma decay;gamma spectra;lanthanum 140
数据来源: Taylor
摘要:
The decay of140La to levels in140Ce has been studied in detail using a GMX-Ge and Hp-Ge coincidence spectrometer. Singles gamma-ray spectra as well as gamma-gamma coincidence were carried out to determine some γ-transitions and to insure others. Energies and relative intensities of 36 γ-transitions in the range from 26 to 3319 keV have been measured. The doubted γ-lines 936.7, 1087.9, 1303.5, 1404.2, 1415.3 and 2533.4 keV were confirmed, while other ones at 798.3, 902.0, 907.0, 1521.8 and 2494.0 keV were not observed. The two γ-lines at 1924 and 2082 keV which were a source of large discrepancies in the previous studies are confirmed in the present work to be sum peaks. Special care was paid in identifying the weak γ-transitions 936.7, 1087.9, 1415.3 and 2533.4 keV.
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