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Effects of weakly coupled channels on quasielastic barrier distributions

Abstract : 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.
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http://hal.in2p3.fr/in2p3-00441031
Contributor : Sophie Heurteau <>
Submitted on : Monday, December 14, 2009 - 2:57:02 PM
Last modification on : Wednesday, September 16, 2020 - 4:07:56 PM

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E. Piasecki, L. Świderski, W. Gawlikowicz, J. Jastrzebski, N. Keeley, et al.. Effects of weakly coupled channels on quasielastic barrier distributions. Physical Review C, American Physical Society, 2009, 80, 054613 (7 p.). ⟨10.1103/PhysRevC.80.054613⟩. ⟨in2p3-00441031⟩

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