5 Tunneling Through Triple-Humped Fission

Flynn, Eric Douglas

N. Takigawa

J.N. Leboeuf, Rajni Sharma

An attempt is made to refine the JWKB approximated expression for penetrability through a double-hump fission barrier when classical turning points are closely situated.

J.N. Leboeuf, Rajni Sharma

The penetrability through double-hump barrier in nuclear fission processes is calculated in the JWKB approximation based on Fröman's F-matrix formalism. Particular attention is paid to coinciding classical turning points where other methods break down. A qualitative discussion of results is also included.

Eliade N. Stefanescu, A. Sãndulescu, Walter Greiner

Analytical expressions for the spectral density of the tunnelling rate are found for a fission-like analytical barrier, having three parts: an internal part approximated by a harmonic oscillator, a top part considered constant and an external part considered as a Coulomb potential. We found that environment-assisted tunnelling processes are present for all three regions and that an environment-stimulated decay is significant only for the Coulomb part of the barrier. Numerical calculations are made for the cold fission of 236 U to 138 Xe+ 98 Sr.

Simon A. Haine