Heavy-ion resonance and statistical fission competition in the [sup 24]Mg+[sup 24]Mg system at [ital E][sub c. m. ]=44. 4 MeV

Journal Article · Tue Feb 01 00:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.1031· OSTI ID:5193732

Hasan, A T; Sanders, S J; Farrar, K A; Prosser, F W ^[1]; Back, B B; Betts, R R; Freer, M; Henderson, D J; Janssens, R V.F.; Wuosmaa, A H ^[2]; Szanto de Toledo, A ^[3]

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1. Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas 66045 (United States)
2. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Departamento de Fisica Nuclear, Instituto de Fisica da Universidade de Sao Paulo, Caixa Postal 20516, 01498-970 Sao Paulo, Sao Paulo (Brazil)

The fully energy-damped cross sections of the [sup 24]Mg+[sup 24]Mg reaction at [ital E][sub c.m.]=44.4 MeV have been measured for all of the major fission channels. High-resolution [ital Q]-value spectra have been obtained for the large-angle yields in the [sup 24]Mg+[sup 24]Mg and [sup 20]Ne+[sup 28]Si channels. Calculations based on the transition-state model are found to reproduce the fully damped cross sections in all of the observed mass channels. The pronounced structure that is observed in the excitation-energy spectra for the more symmetric mass channels, even for the strongly damped yields, is shown to be qualitatively reproduced by assuming a spin-weighted population of the fragment states. There is no evidence, however, that the structure of the nascent fission fragments at scission may influence the population of states in the fragments. These results, taken together with earlier measurements of the resonance behavior of this system, suggest the coexistence of fission from the normal, compact compound nucleus with that from the deformed configurations believed to be responsible for the resonance behavior.

• DOE Contract Number: FG02-89ER40506; W-31109-ENG-38
• OSTI ID: 5193732
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 49:2; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
MAGNESIUM 24 REACTIONS
FISSION
RESONANCE SCATTERING
MAGNESIUM 24 TARGET
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
FISSION YIELD
MEV RANGE 10-100
NUCLEAR DEFORMATION
CHARGED-PARTICLE REACTIONS
DEFORMATION
ENERGY RANGE
HEAVY ION REACTIONS
INELASTIC SCATTERING
MEV RANGE
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
SCATTERING
TARGETS
YIELDS
663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-)
663300 - Nuclear Reactions & Scattering
General- (1992-)
663570 - Nuclear Mass Ranges- A=150-189- (1992-)