ANALYTICAL MODEL FOR QUANTUM TUNNELING WITH DISSIPATION THROUGH A FISSION-LIKE BARRIER

Authors
STEFANESCU E SANDULESCU A GREINER W
Citation
E. Stefanescu et al., ANALYTICAL MODEL FOR QUANTUM TUNNELING WITH DISSIPATION THROUGH A FISSION-LIKE BARRIER, Journal of physics. G, Nuclear and particle physics, 20(5), 1994, pp. 811-828
Citations number
18
Categorie Soggetti
Physics, Particles & Fields","Physics, Nuclear
Journal title
Journal of physics. G, Nuclear and particle physics → ACNP
ISSN journal
09543899
Volume
20
Issue
5
Year of publication
1994
Pages
811 - 828
Database
ISI
SICI code
0954-3899(1994)20:5<811:AMFQTW>2.0.ZU;2-9
Abstract
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 con sidered constant and an external part considered as a Coulomb potentia l. We found that environment-assisted tunnelling processes are present for all three regions and that an environment-stimulated decay is sig nificant only for the Coulomb part of the barrier. Numerical calculati ons are made for the cold fission of U-236 --> 138Xe + 98Sr.