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Is Friction Responsible for the Reduction of Fusion Rates Far Below the Coulomb Barrier?

Giraud, B; Karataglidis, S; Amos, K; Robson, B A

Description

The fusion of two interacting heavy ions traditionally has been interpreted in terms of the penetration of the projectile into the target. Observed rates well below the Coulomb barrier are considerably lower than estimates obtained from penetration factors. One approach in the analysis of the data invokes coupling to nonelastic channels in the scattering as the source of the depletion. Another is to analyze those data in terms of tunneling in semiclassical models, with the observed depletion...[Show more]

dc.contributor.authorGiraud, B
dc.contributor.authorKarataglidis, S
dc.contributor.authorAmos, K
dc.contributor.authorRobson, B A
dc.date.accessioned2015-12-13T22:39:23Z
dc.date.available2015-12-13T22:39:23Z
dc.identifier.issn0556-2813
dc.identifier.urihttp://hdl.handle.net/1885/77764
dc.description.abstractThe fusion of two interacting heavy ions traditionally has been interpreted in terms of the penetration of the projectile into the target. Observed rates well below the Coulomb barrier are considerably lower than estimates obtained from penetration factors. One approach in the analysis of the data invokes coupling to nonelastic channels in the scattering as the source of the depletion. Another is to analyze those data in terms of tunneling in semiclassical models, with the observed depletion being taken as evidence of a "friction" under the barrier. A complementary approach is to consider such tunneling in terms of a fully quantal model. We investigate tunneling with both one-dimensional and three-dimensional models in a fully quantal approach to investigate possible sources for such a friction. We find that the observed phenomenon may not be explained by this friction. However, we find that under certain conditions tunneling may be enhanced or diminished by up to 50%, which finds analogy with observation, without the invocation of a friction under the barrier.
dc.publisherAmerican Physical Society
dc.sourcePhysical Review C: Nuclear Physics
dc.titleIs Friction Responsible for the Reduction of Fusion Rates Far Below the Coulomb Barrier?
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume69
dc.date.issued2004
local.identifier.absfor020203 - Particle Physics
local.identifier.ariespublicationMigratedxPub6551
local.type.statusPublished Version
local.contributor.affiliationGiraud, B, University of Melbourne
local.contributor.affiliationKarataglidis, S, University of Melbourne
local.contributor.affiliationAmos, K, University of Melbourne
local.contributor.affiliationRobson, B A, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.issue6
local.bibliographicCitation.startpage064613-1-8
local.identifier.doi10.1103/PhysRevC.69.064613
dc.date.updated2015-12-11T09:48:45Z
local.identifier.scopusID2-s2.0-4143071569
CollectionsANU Research Publications

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