Authors:
Y. Zhao Chinese Academy of Science Institute of High Energy Physics Beijing 100039 P.R. China

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I. Nishinaka Japan Atomic Energy Research Institute Tokai, Ibaraki 319-1195 Japan

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Y. Nagame Japan Atomic Energy Research Institute Advanced Science Research Center Tokai-mura, Ibaraki 319-1195 Japan

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K. Tsukada Japan Atomic Energy Research Institute Advanced Science Research Center Tokai-mura, Ibaraki 319-1195 Japan

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K. Sueki Tokyo Metropolitan University Graduate School of Science Hachioji, Tokyo 192-0397 Japan

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S. Goto Niigata University Department of Chemistry, Faculty of Science Niigata 950-2181 Japan

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M. Tanikawa University of Tokyo Department of Chemistry Tokyo 113-8657 Japan

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H. Nakahara Tokyo Metropolitan University Graduate School of Science Hachioji, Tokyo 192-0397 Japan

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Abstract  

The primary fragment mass-yield distribution for the asymmetric fission path in heavy nuclei, 233Pa, 239Np, 245Am and 249Bk at the excitation energy of ~20 MeV are experimentally constructed based on the intensities of total kinetic energies for individual mass splits. The results revealed an interesting phenomenon: in all the studied fissioning systems, the inner wings of the mass-yield distributions in the asymmetric fission path appear along the same mass-wall of A = 130 fragment mass. The asymmetric mass-yield distribution indicates the strong effect of structural shells in fragments on the final mass division process of the asymmetric fission path.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)