A pedagogical reconstruction of Bohr and Wheeler’s fission-barrier graph

A large set of experimental observables for the 232 Th , 235 U (α, xnf ) reactions has been analyzed within the dynamic-statistical approach with allowance for the nuclear dissipation phenomenon, the double humped structure of fission barrier, and also the temperature damping of shell effects. The energy dependences of the lifetime effect (experimentally measured by the crystal blocking technique) along the corresponding data on the fission fragment angular anisotropy and also fission probabilities of U and Pu isotopes produced in the reactions were chosen for the analysis. Reliable information on the nuclear viscosity at the low excitation energies (< 30 MeV) was obtained.

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Large superfluidity enhancement in the penetration of the fission barrier

Physics Letters B ◽

10.1016/0370-2693(74)90494-8 ◽

1974 ◽

Vol 49 (2) ◽

pp. 147-149 ◽

Cited By ~ 27

Author(s):

L.G. Moretto ◽

R.P. Babinet

Keyword(s):

Fission Barrier

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Fusion and fission barrier heights and positions within the Generalized Liquid Drop Model

Nuclear Physics A ◽

10.1016/j.nuclphysa.2021.122191 ◽

2021 ◽

Vol 1010 ◽

pp. 122191

Author(s):

G. Royer ◽

M. Guillot ◽

J. Monard

Keyword(s):

Liquid Drop ◽

Fission Barrier ◽

Liquid Drop Model ◽

Barrier Heights

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THE FISSION BARRIERS OF HEAVY AND EXOTIC NUCLEI

International Journal of Modern Physics E ◽

10.1142/s0218301310014923 ◽

2010 ◽

Vol 19 (04) ◽

pp. 514-520 ◽

Cited By ~ 3

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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