We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
ТУНЕЛЮ ВАННЯ КРІЗЬ БАР'ЄРИ АЛЬБРЕХТА З ДИСИПАТИВНИМ И КОМПОНЕНТАМИ
- Authors
Майданюк, С. П.
- Abstract
We present a new method for the determination of the wave function for a particle tunneling through onedimensional Albrecht potential barriers with a dissipative term constructed on the basis of evolving non-stationary wave packets. The intensity of the influence of the dissipative forces of such a type on the tunneling process can be controlled via an arbitrary parameter γ. The properties of the dissipative forces in tunneling are investigated in the task of capture of the α-particle by the nucleus 44Ca with the rectangular barrier (whose parameters were extracted from modern approaches for the description of the interaction between the α-particle and nucleus without any dissipation in this α-capture reaction). Understanding the influence of dissipation on the tunneling processes can be better obtained on the basis of the characteristics which are not dependent on the arbitrary dissipative parameter γ. A dissipative correction ∆T of the penetrability without dissipation T0 or its ratio to the penetrability without dissipation ∆T/T0 provides such information. We performed calculations of this characteristic in dependence on the energy of the α-particle, and we conclude: • The dissipative correction ∆T is negative, i.e. the inclusion of a dissipative term WA of Albrecht type into the potential suppresses barrier penetrability. This result is natural, but it was obtained on the basis of the developed method. • We observe the presence of clear minimum in dependence of the dissipative correction ∆T/T0 on the energy of the incident α-particle at E = 5.27 MeV where the influence of the dissipative forces on the tunneling processes is maximal. At a further increase of the energy the role of the dissipative forces is decreased. • At decreasing of the energy of the α-particle (from 5.27 MeV) the dissipative correction ∆T/T0 is decreased. This indicates at the suppression of the influence of the dissipative forces on the tunneling process deeply under the barrier. • A general dependence of the dissipative correction ∆T/T0 on energy of the α-particle has an oscillatoric character. We can explain such a behavior by the wave nature of the tunneling processes under the barrier (where most of characteristics have a harmonic energy dependence).
- Publication
Journal of Physical Studies, 2015, Vol 19, Issue 3, p3001-1
- ISSN
1027-4642
- Publication type
Academic Journal