Role of Effective Distance in the Fission Mechanism Study by the Double-energy Measurement for Uranium Isotopes.
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- BABA Hiroshi
- Department of Chemistry, Graduate School of Science, Osaka University
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- SAITO Tadashi
- Department of Chemistry, Graduate School of Science, Osaka University
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- TAKAHASHI Naruto
- Department of Chemistry, Graduate School of Science, Osaka University
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- YOKOYAMA Akihiko
- Department of Chemistry, Graduate School of Science, Osaka University
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- MIYAUCHI Takahiro
- Department of Chemistry, Graduate School of Science, Osaka University
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- MORI Sigehisa
- Department of Chemistry, Graduate School of Science, Osaka University
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- YANO Daisaku
- Department of Chemistry, Graduate School of Science, Osaka University
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- HAKODA Teruyuki
- Department of Chemistry, Graduate School of Science, Osaka University Present address: Japan Atomic Energy Research Institute,
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- TAKAMIYA Koichi
- Department of Chemistry, Graduate School of Science, Osaka University
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- NAKANISHI Kiyoshi
- Department of Chemistry, Graduate School of Science, Osaka University
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- NAKAGOME Yoshihiro
- Research Reactor Institute, Kyoto University
Bibliographic Information
- Other Title
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- Role of Effective Distance in the Fissi
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Abstract
<BR>Fission product kinetic energies were measured by the double-energy method for thermal-neutron fission of 235, 233U and proton-induced fission of 238U at the 15.8-MeV excitation. From the obtained energy-mass correlation data, the kinetic-energy distribution was constructed from each mass bin to evaluate the first moment of the kinetic energy for a given fragment mass. The resulting kinetic energy was then converted to the effective distance between the charge centers at the moment of scission. The effective distances deduced for the proton-induced fission was concluded to be classified into two constant values, one for asymmetric and the other for symmetric mode, irrespective of the mass though an additional component was further extracted in the asymmetric mass region. This indicates that the fission takes place via two well-defined saddles, followed by the random neck rupture. On the contrary, the effective distances obtained for thermal-neutron induced fission turned out to lie along the contour line at the same level as the equilibrium deformation in the two-dimensional potential map. This strongly suggests that it is essentially a barrier-penetrating type of fission rather than the over-barrier fission.
Journal
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- Journal of Nuclear Science and Technology
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Journal of Nuclear Science and Technology 34 (9), 871-881, 1997
Atomic Energy Society of Japan
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Details 詳細情報について
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- CRID
- 1390282679072526464
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- NII Article ID
- 10002077948
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- NII Book ID
- AA00703720
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- COI
- 1:CAS:528:DyaK2sXnt1ahtbo%3D
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- ISSN
- 18811248
- 00223131
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- NDL BIB ID
- 4307548
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed