Nuclear-Charge Polarization at Scission in Proton-Induced Fission of Light Actinides

Journal Article · Wed Mar 04 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3108846· OSTI ID:21289480

Nishinaka, I; Nagame, Y ^[1]; Tanikawa, M ^[2]; Nakahara, H ^[3]

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1. Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195 (Japan)
2. School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0032 (Japan)
3. Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397 (Japan)

Fragment mass yields and the average neutron multiplicity in the proton-induced fission of {sup 232}Th and {sup 233}U were measured by a double time-of-flight method. The most probable charges of secondary fragments were evaluated from the fragment mass yields measured and the fractional cumulative yields reported. The nuclear charge polarization of primary fragments at scission was obtained by correcting the most probable charge of secondary fragments for neutron evaporation. The results show that the nuclear-charge polarization at scission is associated with the liquid-drop properties of nuclei and the proton shell effect with Z = 50 of heavy fragments and that it is practically insensitive to mass and excitation energy of the fissioning nucleus in the region of light actinides.

• OSTI ID: 21289480
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1098; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXCITATION
FISSION
FISSION FRAGMENT SPECTROMETERS
LIQUID DROP MODEL
MULTIPLICITY
NEUTRON EMISSION
NUCLEAR REACTION YIELD
POLARIZATION
PROTON REACTIONS
SCISSION-POINT MODEL
THORIUM 233 TARGET
TIME-OF-FLIGHT METHOD
URANIUM 233 TARGET