Phys. Rev. C 80, 054613 (2009) [7 pages]Effects of weakly coupled channels on quasielastic barrier distributionsReceived 24 January 2009; revised 29 September 2009; published 25 November 2009 Heavy-ion collisions often produce fusion barrier distributions with structures displaying a fingerprint of couplings to highly collective excitations. Similar distributions can be obtained from large-angle quasielastic scattering, although in this case, the role of the many weak direct-reaction channels is unclear. For 20Ne+90Zr, we have observed the barrier structures expected for the highly deformed neon projectile; however, for 20Ne+92Zr, we find significant extra absorption into a large number of noncollective inelastic channels. This leads to smearing of the barrier distribution and a consequent reduction in the “resolving power” of the quasielastic method. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.80.054613
DOI:
10.1103/PhysRevC.80.054613
PACS:
25.70.Jj, 24.10.Eq, 25.70.Bc, 25.70.Hi
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