Role of nuclear dynamics in deducing the fusion-fission time scales from prescission neutron multiplicities

Journal Article · Sat Apr 01 00:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.2054· OSTI ID:6473048

Siwek-Wilczynska, K ^[1]; Wilczynski, J ^[2]; Siemssen, R H; Wilschut, H W ^[3]

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1. Institute of Experimental Physics, Warsaw University, 00-681 Warsaw (Poland)
2. Soltan Institute for Nuclear Studies, 05-400 Otwock-Swierk (Poland)
3. Kernfysisch Versneller Instituut, 9747 AA Groningen (Netherlands)

Existing data on the prescission neutron multiplicities have been analyzed with a new method combining time-dependent statistical cascade calculations with Feldmeier's model of the dynamics of nucleus-nucleus collisions. The analysis resulted in the determination of the time scale [tau][sub [ital f]] of fusion-fission reactions for different composite systems with excitation energies ranging from 80 to 240 MeV. The deduced values of [tau][sub [ital f]] range from 5[times]10[sup [minus]20] to 10[sup [minus]18] s. These time scales are approximately 10 times longer than those deduced for the same set of data with the static'' model used by Hinde and collaborators.

• OSTI ID: 6473048
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 51:4; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CASCADE THEORY
TIME DEPENDENCE
NEUTRONS
MULTIPLICITY
COMPOSITE MODELS
FISSION
HEAVY ION FUSION REACTIONS
STATISTICAL MODELS
BARYONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE MODELS
663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-)