Mechanism of ternary breakup in the reaction {sup 197}Au+{sup 197}Au at 15A MeV
- China Institute of Atomic Energy, P.O. Box 275(18), Beijing 102413 (China)
- College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China)
The mechanism of the ternary breakup of the very heavy system {sup 197}Au+{sup 197}Au at an energy of 15A MeV has been studied by using the improved quantum molecular dynamics model. The calculation results reproduce the characteristic features in ternary breakup events explored in a series of experiments; i.e., the masses of three fragments are comparable in size and the very fast, nearly collinear breakup of the colliding system is dominant in the ternary breakup events. Further, the evolution of the time scales of different ternary reaction modes and the behavior of mass distributions of three fragments with impact parameters are studied. The time evolution of the configurations of the composite reaction systems is also studied. We find that for most of the ternary breakup events with the features found in the experiments, the configuration of the composite system has two-preformed-neck shape. The study shows that those ternary breakup events having the characteristic features found in the experiments happen at relatively small impact parameter reactions, but not at peripheral reactions. The ternary breakup reaction at peripheral reactions belongs to binary breakup with a neck emission.
- OSTI ID:
- 21499185
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 82; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BREAKUP REACTIONS
CALCULATION METHODS
COLLISIONS
CONFIGURATION
DISTRIBUTION
EMISSION
ENERGY RANGE
GOLD 197
GOLD ISOTOPES
HEAVY NUCLEI
IMPACT PARAMETER
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MASS
MASS DISTRIBUTION
MEV RANGE
MOLECULAR DYNAMICS METHOD
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPATIAL DISTRIBUTION
STABLE ISOTOPES