Long-lifetime fission component and Langevin fluctuation-dissipation dynamics of heavy-ion induced nuclear fission

A new probe of dynamical effects in heavy-ion induced fission is proposed. This is the long-lifetime'' tail of the time distribution of fission events, or the so-called long-lifetime fission component (LLFC). The excess of LLFC over its standard statistical-model value is calculated by tak...

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Bibliographic Details
Published in:Physical review letters 1993-03, Vol.70 (9), p.1220-1223
Main Authors: Lazarev, YA, Gontchar, II, II, Mavlitov, ND
Format: Article
Language:English
Subjects:
663570 > Nuclear Mass Ranges-- A=150-189-- (1992-)
BARYONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EQUATIONS
FERMIONS
FISSION
FLUCTUATIONS
FLUORINE 19
FLUORINE ISOTOPES
HADRONS
HEAVY ION REACTIONS
HEAVY NUCLEI
ISOTOPES
LANGEVIN EQUATION
LIGHT NUCLEI
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARAMETRIC ANALYSIS
STABLE ISOTOPES
TANTALUM 181
TANTALUM ISOTOPES
THALLIUM ISOTOPES
VARIATIONS 663450 > Heavy-Ion-Induced Reactions & Scattering-- (1992-)
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Summary:A new probe of dynamical effects in heavy-ion induced fission is proposed. This is the long-lifetime'' tail of the time distribution of fission events, or the so-called long-lifetime fission component (LLFC). The excess of LLFC over its standard statistical-model value is calculated by taking into account dissipation and fluctuations of the collective nuclear motion. The magnitude of this excess is shown to be much larger and its dependence upon the reduced friction parameter to be much stronger than those of the corresponding excess of the pre-scission neutron multiplicity which is at present a commonly used probe of dynamical effects in heavy-ion induced fission. Experiments for measuring LLFC are proposed which can provide decisive information about the strength of nuclear friction for compact configurations in nuclear fission.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.70.1220