Fission in intermediate energy heavy ion reactions
A systematic study of reaction mechanisms at intermediate energies (50--100 MeV/A) has been performed at the Lawrence Berkeley Laboratory's BeValac using medium weight projectiles on medium and heavy element targets. A gas and plastic phoswich detector system was employed which gave large geometric coverage and a wide dynamic response. The particles identified with the gas detectors could be characterized into three components--intermediate mass fragments (IMF), fission fragments (FF) and heavy residues (HR). Major observed features are: the reaction yields are similar in the 50 to 100 MeV/A range, central collisions have high multiplicity of IMF's with broad angular correlations consistent with a large participant region, effects of final state Coulomb interactions are observed and give information on the size and temporal behavior of the source, true fission yields are dependent on target fissility and correlated with relatively peripheral collisions. Analysis of fission and evaporation yields implies limiting conditions for which fission decay remains a viable deexcitation channel. 15 refs., 7 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6390660
- Report Number(s):
- UCRL-100825; CONF-890491-6; ON: DE89012295
- Resource Relation:
- Conference: International conference on fifty years of research in nuclear fission, Berlin, F.R. Germany, 3 Apr 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
GOLD 197 TARGET
HEAVY ION REACTIONS
COINCIDENCE METHODS
COMPUTERIZED SIMULATION
DECAY
EXPERIMENTAL DATA
FISSION
FISSION FRAGMENTS
IRON
LINEAR MOMENTUM
MEV RANGE
MULTIPLICITY
NIOBIUM 93 REACTIONS
NUCLEON-NUCLEON INTERACTIONS
P CODES
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
COMPUTER CODES
COUNTING TECHNIQUES
DATA
ELEMENTS
ENERGY RANGE
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
METALS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
SIMULATION
TARGETS
TRANSITION ELEMENTS
651920* - Nuclear Properties & Reactions
A=190-219
Experimental
990210 - Supercomputers- (1987-1989)