Dynamical interpretation of average fission-fragment kinetic energy systematics and nuclear scission

Journal Article · Tue Nov 01 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.054608· OSTI ID:20699136

Nadtochy, P N ^[1]; Adeev, G D ^[2]

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1. GSI, Plankstrasse 1, D-64291 Darmstadt (Germany)
2. Omsk State University, Department of Theoretical Physics, Mira Prospect 55-A, RU-644077 Omsk (Russian Federation)

A dynamical interpretation of the well-known systematics for average total kinetic energy of fission fragments <E{sub K}> over a wide range of the Coulomb parameter (600<Z{sup 2}/A{sup 1/3}<2200) is given. Different scission criteria traditionally employed in fission theory--at zero neck radius and at finite neck radius--have been applied in dynamical calculations. Both have resulted in a fairly good description of the dependence of <E{sub K}> on the Coulomb parameter. The results of dynamical calculations of <E{sub K}> within three-dimensional Langevin dynamics show that the mean distance between the centers of mass of nascent fragments at the scission configuration increases linearly with the parameter Z{sup 2}/A{sup 1/3}. This distance changes approximately from 2.35R{sub 0} for {sup 119}Xe to 2.6R{sub 0} for {sup 256}Fm. In spite of this increase in mean distance between future fragments at scission, the linear dependence of <E{sub K}> on the parameter Z{sup 2}/A{sup 1/3} remains approximately valid over a wide range of the Coulomb parameter Z{sup 2}/A{sup 1/3}.

• OSTI ID: 20699136
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COULOMB FIELD
DISTANCE
FERMIUM 256
FISSION
FISSION FRAGMENTS
FISSION PRODUCTS
KINETIC ENERGY
SCISSION-POINT MODEL
THREE-DIMENSIONAL CALCULATIONS
XENON 119