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Non-equilibrium fission processes in intermediate energy nuclear collisions

Conference ·
OSTI ID:5980994
; ; ; ; ;

We have measured the target fragment yields, angular and energy distributions for the interaction of 12-16 MeV/A/sup 32/S with /sup 165/Ho and /sup 197/Au and for the interaction of 32 and 44 MeV/A /sup 40/Ar with /sup 197/Au. The Au fission fragments associated with the peripheral collision peak in the folding angle distribution originate in a normal, ''slow'' fission process in which statistical equilibrium has been established. At the two lowest projectile energies, the Au fission fragments associated with the central collision peak in the folding angle distribution originate in part from ''fast'' (/tau//approximately//sup /minus/23/s), non-equilibrium processes. Most of the Ho fission fragments originate in non- equilibrium processes. The fast, non-equilibrium process giving rise to these fragments has many of the characteristics of ''fast fission'', but the cross sections associated with these fragments are larger than one would expect from current theories of ''fast fission. '' 14 refs., 8 figs.

Research Organization:
Lawrence Berkeley Lab., CA (USA)
DOE Contract Number:
AC03-76SF00098
OSTI ID:
5980994
Report Number(s):
LBL-27177; CONF-890406-22; ON: DE89013695
Resource Relation:
Fifty years with nuclear fission conference, Gaithersburg, MD, USA, 25 Apr 1989
Country of Publication:
United States
Language:
English

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Related Subjects

651820 -- Nuclear Properties & Reactions
A=150-189
Experimental
651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ARGON 40 REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ENERGY RANGE
EXPERIMENTAL DATA
FISSION FRAGMENTS
GOLD 197 TARGET
HEAVY ION REACTIONS
HOLMIUM 165 TARGET
INFORMATION
MEV RANGE
MEV RANGE 10-100
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUMERICAL DATA
SULFUR 32 REACTIONS
TARGETS