Effects of nuclear orientation on fusion and fission process for reactions using {sup 238}U target nucleus

Journal Article · Tue Jun 01 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3455957· OSTI ID:21362128

Nishio, K; Ikezoe, H; Mitsuoka, S; Nishinaka, I; Makii, H; Nagame, Y ^[1]; Watanabe, Y ^[2]; Ohtsuki, T; Hirose, K ^[3]; Hofmann, S ^[4]

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1. Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)
2. High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)
3. Laboratory of Nuclear Science, Tohoku University, Sendai 982-0826 (Japan)
4. GSI Helmholtzzentrum fuer Schwerionenforschung, 64291 Darmstadt (Germany)

Fission fragment mass distributions in the reaction of {sup 30}Si+{sup 238}U were measured at the energies around the Coulomb barrier. At the above-barrier energies, the mass distribution showed Gaussian shape. At the sub-barrier energies, asymmetric fission mode peaked at A{sub L}/A{sub H}approx =90/178 was observed. The asymmetric fission should be attributed to quasifission from the results of the measured evaporation residue (ER) cross-sections produced by {sup 30}Si+{sup 238}U. The cross-section for {sup 263}Sg at the above-barrier energy agree with the statistical model calculation which assumes that the measured fission cross-sections are equal to the fusion cross-sections, whereas the one for {sup 264}Sg measured at the sub-barrier energy is smaller than the calculation, indicating the presence for quasifission. The fragment mass distributions are compared to those for {sup 36}S+{sup 238}U and {sup 40}Ar+{sup 238}U.

• OSTI ID: 21362128
• Journal Information: AIP Conference Proceedings, Vol. 1238, Issue 1; Conference: 7. Tours symposium on nuclear physics and astrophysics, Kobe (Japan), 16-20 Nov 2009; Other Information: DOI: 10.1063/1.3455957; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 40
ARGON 40 BEAMS
ARGON 40 REACTIONS
COULOMB FIELD
CROSS SECTIONS
FISSION
FISSION FRAGMENTS
MASS DISTRIBUTION
QUASI-FISSION
SEABORGIUM 263
SEABORGIUM 264
SHELL MODELS
SILICON 30
SILICON 30 REACTIONS
STATISTICAL MODELS
URANIUM 238
URANIUM 238 TARGET
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ARGON ISOTOPES
BEAMS
DISTRIBUTION
ELECTRIC FIELDS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HEAVY ION REACTIONS
HEAVY NUCLEI
ION BEAMS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
RADIOISOTOPES
SEABORGIUM ISOTOPES
SILICON ISOTOPES
SPATIAL DISTRIBUTION
SPONTANEOUS FISSION RADIOISOTOPES
STABLE ISOTOPES
TARGETS
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES