New Radioactivity 43-min Yttrium-84

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概要

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• A New 43±2-min yttrium radioactivity has been observed in the natural strontium target irradiated with 57-MeV protons. It is assigned to Y^<84> by measuring the excitation function. The 3.7-hr activity previously assigned to Y^<84> is identified to Y^<85>. Gamma transitions of 0.453 MeV (10%), 0.590-MeV (15%),0.795-MeV (100%, E2), 0.982-MeV (100%, E2), 1.041-MeV (50%, E2 or M1), 1.27-MeV (9%), and 1.47-MeV (6%) are observed in the scintillation and internal conversion spectra of Y^<84>. The positron spectrum taken with a beta-ray spectrometer gives maximum energies of 3.50±0.10-MeV and 2.90±0.15-MeV. Gamma-Gamma and positron-gamma coincidence measurements are carried out. A tentative decay scheme is proposed.

• 社団法人日本物理学会の論文
• 1962-08-05

著者

• Sakai Mitsuo

  Institute For Nuclear Study University Of Tokyo

• HASHIMOTO Yoshio

  Department of Electrical and Electronic Engineering, Faculty of Engineering, Shinshu University

• OHNUMA Hajime

  Institute of Nuclear Study, University of Tokyo

• Hashizume Akira

  Institute Of Physical And Chemical Research

• Yamazaki Toshimitsu

  Institute For Nuclear Study University Of Tokyo

• Hashimoto Yoshio

  Department Of Dermatology Asahikawa Medical College

• Ohnuma Hajime

  Institute For Solid State Physics University Of Tokyo

• Ohnuma Hajime

  Institute For Nuclear Study The University Of Tokyo

• Fujioka Manabu

  Department Of Applied Physics Tokyo Institute Of Technology:(present Address) Department Of Physics

• Fujioka Manabu

  Department Of Physics University Of Tokyo

• Fujioka Manabu

  Department Of Applied Physics Tokyo Institute Of Technology

• Takekoshi Eiko

  Japan Atomic Energy Research Institute

• Ikegami Hidetsugu

  Institute for Nuclear Study, University of Tokyo

• Ikegami Hidetsugu

  Institute For Nuclear Study University Of Tokyo:department Of Physics Brookhaven National Laboratory

• Ikegami Hidetsugu

  Institute For Nuclear Study University Of Tokyo

• Hashimoto Yoshio

  Department Of Physics University Of Tokyo

• Hashimoto Yoshio

  Department Of Dairy And Meat Science Faculty Of Agriculture Hokkaido University

• Yamazaki T.

  Institute for Nuclear Study

• Sakai Mitsuo

  Institute For Nuclear Study Tokyo University

• Hashimoto Yoshio

  Department Of Anesthesiology University Of Hirosaki School Of Medicine

• Ikegami Hidetsugu

  Institute for Nuclear Study The University of Tokyo

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