Dependence of intermediate mass fragment production on the reaction mechanism in light heavy-ion collisions at intermediate energy

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.823· OSTI ID:278847

Larochelle, Y; Beaulieu, L; Anctil, G; Djerroud, B; Dore, D; Laforest, R; Pouliot, J; Roy, R; Samri, M; St-Pierre, C ^[1]; Ball, G C; Bowman, D R; Galindo-Uribarri, A; Hagberg, E; Horn, D ^[2]; Guinet, D; Lautesse, P ^[3]

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1. Departement de Physique, Laboratoire de Physique Nucleaire, Universite Laval, Quebec, G1K 7P4 (CANADA)
2. AECL Research, Chalk River Laboratories, Ontario, K0J 1J0 (CANADA)
3. Institut de Physique Nucleaire de Lyon, 46 Boulevard du 11 Novembre 1918, F-69622, Villeurbanne Cedex (France)

The same hot nuclear system ({Sigma}{ital Z}=18) has been studied for two different entrance channels with reaction products detected in a forward array of scintillators: central collisions of {sup 24}Mg on a {sup 12}C target at 25{ital A} and 35{ital A} MeV and peripheral pickup reactions of {sup 35}Cl on a {sup 197}Au target at 43{ital A} MeV. The detection-efficiency-corrected charge distributions, multiplicity of charged particles and cross sections as a function of excitation energy are compared. The reaction mechanism is investigated, through comparison to simulations with statistical observables. The central reaction {sup 24}Mg+{sup 12}C at 35{ital A} MeV is well characterized by a dissipative binary collision scenario. Data at 25{ital A} MeV show less evidence of such dynamical characteristics. The intermediate-mass fragments (3{le}{ital Z}{le}8) production for each reaction is compared to model calculations for different values of excitation energy. The systems formed in the central collision at 25{ital A} MeV and the pickup reaction at 43{ital A} MeV show similar source characteristics, both statistically and in momentum space. However, the yields of the various exit channels, from evaporation and/or fission to multifragmentation and vaporization, differ for the two reactions. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 278847
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 53; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON 12 TARGET
CHARGE DISTRIBUTION
CHARGED PARTICLES
CHLORINE 35 REACTIONS
CROSS SECTIONS
EVAPORATION
EXCITATION
GOLD 197 TARGET
HOT NUCLEI
MAGNESIUM 24 REACTIONS
MEV RANGE 100-1000
MULTIPLICITY
PICKUP REACTIONS