Asymmetrical fission and statistical emission of complex fragments from the highly excited {sup 47}V compound nucleus

Conference · Tue Dec 31 00:00:00 EST 1991

OSTI ID:10137035

Beck, C; Djerroud, B; Haas, F; Freeman, R M; Hachem, A; Heusch, B; Morsad, A; Vuillet-A-Crilles, M; Youlal, M; Abe, Y ^[1]; Dayras, R; Wieleczko, J P; Legrain, R; Pollaco, E ^[2]; Ray, A; Shapira, D; Campo, J G.D.; Kim, H J ^[3]; Cavallaro, S; De Fillippo, E ; Lanzano, G; Pagano, A; Sperduto, M L ^[4]; Matsuse, T ^[5]; Sanders, S J ^[6]

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1. Strasbourg-1 Univ., 67 (France). Centre de Recherches Nucleaires
2. CEA Centre d`Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)
3. Oak Ridge National Lab., TN (United States)
4. Istituto Nazionale di Fisica Nucleare, Catania (Italy)
5. Shinshu Univ., Matsumoto, Nagano (Japan)
6. Kansas Univ., Lawrence, KS (United States)

The properties of the fully damped (deep-inelastic and orbiting) and fusion (evaporation and fission) processes have been investigated in three entrance channels leading to the same {sup 47} V compound nucleus at high excitation energies. No entrance channel effect has been observed in either the evaporation residue or the fission-like yields in contrast to the {sup 28}Si + {sup 12}C and {sup 24}Mg + {sup 16}O reactions in which the orbiting process still persists. The asymmetrical elemental distributions of the fully energy relaxed fragments are well described by fusion-fission models based respectively on the scission point and saddle point pictures. Finally a general discussion of the competition between orbiting and fusion-fission mechanisms in light heavy-ion reactions is presented in the framework of their calculated available number of open channels.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10137035
• Report Number(s): CONF-920140-1; ON: DE92011064
• Resource Relation: Conference: 30. winter meeting on nuclear physics,Bormio (Italy),27 Jan - 1 Feb 1992; Other Information: PBD: [1991]
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
VANADIUM 47
FISSION FRAGMENTS
CARBON 12 TARGET
CHLORINE 35 REACTIONS
MAGNESIUM 24 TARGET
SODIUM 23 REACTIONS
HAUSER-FESHBACH THEORY
COMPOUND NUCLEI
ASYMMETRY
ENERGY SPECTRA
ANGULAR DISTRIBUTION
CROSS SECTIONS
STATISTICAL MODELS
663450
663470
663520
663530
663540
HEAVY-ION-INDUCED REACTIONS AND SCATTERING
FISSION
A = 6-19
A = 20-38
A = 39-58