Influence of Effective Tensor Forces on the Fission Barriers of Nuclei in the Uranium Region

JETP Letters ◽  
2018 ◽  
Vol 107 (2) ◽  
pp. 86-90
Author(s):  
S. V. Tolokonnikov ◽  
I. N. Borzov ◽  
Yu. S. Lyutostansky ◽  
E. E. Saperstein
Keyword(s):  
Fission Barriers

scholarly journals RELATIVE MOTION CORRECTION TO FISSION BARRIERS

2008 ◽  
Vol 17 (01) ◽  
pp. 151-159 ◽  
Author(s):  
J. SKALSKI
Keyword(s):  
Relative Motion ◽  
Cluster Model ◽  
Motion Correction ◽  
Mean Field Theory ◽  
Mean Field ◽  
Ternary Fission ◽  
Skyrme Interaction ◽  
Hartree Fock ◽  
Fission Barriers ◽  
The Mean

We discuss the effect of kinetic energy of the relative motion becoming spurious for separate fragments on the selfconsistent mean-field fission barriers. The treatment of the relative motion in the cluster model is contrasted with the necessity of a simpler and approximate approach in the mean-field theory. A scheme of the energy correction to the Hartree-Fock is proposed. The results obtained with the effective Skyrme interaction SLy 6 show that the correction, previously estimated as ~ 8 MeV in A = 70 - 100 nuclei, amounts to 4 MeV in the medium heavy nucleus 198 Hg and to null in 238 U . However, the corrected barrier implies a shorter fission half-life of the latter nucleus. The same effect is expected to lower barriers for multipartition (i.e. ternary fission, etc) and make hyperdeformed minima less stable.

Fission barriers and the inclusion of axial asymmetry

1972 ◽  
Vol 38 (5) ◽  
pp. 269-273 ◽  
Author(s):  
S.E. Larsson ◽  
I. Ragnarsson ◽  
S.G. Nilsson
Keyword(s):  
Fission Barriers

Fission barriers and other characteristics of nuclei from the uranium region

2017 ◽  
Vol 80 (4) ◽  
pp. 631-645 ◽  
Author(s):  
S. V. Tolokonnikov ◽  
I. N. Borzov ◽  
Yu. S. Lutostansky ◽  
I. V. Panov ◽  
E. E. Saperstein
Keyword(s):  
Fission Barriers

THE FISSION BARRIERS OF HEAVY AND EXOTIC NUCLEI

2010 ◽  
Vol 19 (04) ◽  
pp. 514-520 ◽  
Author(s):  
FEDIR IVANYUK ◽  
KRZYSZTOF POMORSKI
Keyword(s):  
Liquid Drop ◽  
Optimal Shape ◽  
Exotic Nuclei ◽  
Fission Barrier ◽  
Heavy Nuclei ◽  
Accurate Approximation ◽  
Barrier Heights ◽  
A Value ◽  
Fission Barriers ◽  
Experimental Values

We have calculated the liquid drop fission barriers of medium and heavy nuclei within the Lublin-Strasbourg-Drop model. Exploiting in addition the topographical theorem by Myers and Światecki we propose a simple but quite accurate approximation of the fission barrier heights. When comparing the r.m.s. deviation of approximated versus experimental values of fission barrier heights for known nuclei with Z > 70 a value 1.1 MeV is obtained which is comparable with the experimental uncertainties. The Strutinsky optimal shape method is generalized to the left-right asymmetric shapes of nuclei in order to investigate the influence of this degree of freedom on the barrier heights.

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