Beta- and Gamma-Ray Spectroscopy of Mn^<52> and Mn^<52m>
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概要
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Excited levels of Cr^<52> were studied by investigating the decays of Mn^<52>(5.7days) and Mn^<52m>(21min), produced by Cr^<52>(d, 2n)Mn^<52,53m>. By means of a two-directional focusing beta-ray spectrometer, NaI(TI) scintillation spectrometers and a 20-channel pulse height analyzer, following results were obtained: (1) Energies of the main three gamma-rays from Mn^<52> are 746.8±0.2, 938.1±0.4 and 1434.7±0.8keV. (2) The maximum energies of the positrons from Mn^<52> and Mn^<52m> are 0.572±0.006 and 2.61±0.03MeV, respectively. (3) The spins and parities of the levels of 3120, 2373 and 1435keV were determined to be 6+, 4+ and 2+, from measurements of conversion electrons and angular correlations. (4) Several weak gamma-rays were found, which could be inferred to belong to these decays. (5) The half-life of Mn^<52>is 2±1 min. Its branching ratio IT/(β^+ + EC) was determined as 2±1 percent. (6) The energy of isomeric transition is 0.383±0.003MeV, which was decided as E4 from K/L + M and the transition probability.
- 社団法人日本物理学会の論文
- 1960-12-05
著者
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Katoh Toshio
Department Of Nuclear Engineering Faculty Of Engineering Nagoya University
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Koh Yujiro
Department of Physics, Faculty of Science, Osaka City University
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Yoshizawa Yasukazu
Department Of Physics Faculty Of Science Osaka University
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Yoshizawa Yasukazu
Department Of Chemistry Faculty Of Science Osaka University
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NOZAWA Masao
Department of Physics, Faculty of Science, Osaka University
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Koh Yujiro
Department Of Physics Faculty Of Science Osaka City University
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Nozawa Masao
Department Of Physics Faculty Of Science Osaka University:(present)japan Atomic Energy Research Inst
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Nozawa Masao
Department Of Physics Faculty Of Science Osaka University
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Katoh T.
Department of Physics, Faculty of Science, Osaka University
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