Effects of weakly coupled channels on quasielastic barrier distributions

E. Piasecki; L. Świderski; W. Gawlikowicz; J. Jastrzȩbski; N. Keeley; M. Kisieliński; S. Kliczewski; A. Kordyasz; M. Kowalczyk; S. Khlebnikov; E. Koshchiy; E. Kozulin; T. Krogulski; T. Loktev; M. Mutterer; K. Piasecki; A. Piórkowska; K. Rusek; A. Staudt; M. Sillanpää; S. Smirnov; I. Strojek; G. Tiourin; W. H. Trzaska; A. Trzcińska; K. Hagino; N. Rowley

doi:10.1103/PhysRevC.80.054613

Effects of weakly coupled channels on quasielastic barrier distributions

E. Piasecki, L. Świderski, W. Gawlikowicz, J. Jastrzȩbski, N. Keeley, M. Kisieliński, S. Kliczewski, A. Kordyasz, M. Kowalczyk, S. Khlebnikov, E. Koshchiy, E. Kozulin, T. Krogulski, T. Loktev, M. Mutterer, K. Piasecki, A. Piórkowska, K. Rusek, A. Staudt, M. SillanpääS. Smirnov, I. Strojek, G. Tiourin, W. H. Trzaska, A. Trzcińska, K. Hagino, N. Rowley

SCI - Physics

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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 Ne20+Zr90, we have observed the barrier structures expected for the highly deformed neon projectile; however, for Ne20+Zr92, 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.

Original language	English
Article number	054613
Journal	Physical Review C - Nuclear Physics
Volume	80
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.80.054613
Publication status	Published - 2009 Nov 25

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.80.054613

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Piasecki, E., Świderski, L., Gawlikowicz, W., Jastrzȩbski, J., Keeley, N., Kisieliński, M., Kliczewski, S., Kordyasz, A., Kowalczyk, M., Khlebnikov, S., Koshchiy, E., Kozulin, E., Krogulski, T., Loktev, T., Mutterer, M., Piasecki, K., Piórkowska, A., Rusek, K., Staudt, A., ... Rowley, N. (2009). Effects of weakly coupled channels on quasielastic barrier distributions. Physical Review C - Nuclear Physics, 80(5), [054613]. https://doi.org/10.1103/PhysRevC.80.054613

Piasecki, E, Świderski, L, Gawlikowicz, W, Jastrzȩbski, J, Keeley, N, Kisieliński, M, Kliczewski, S, Kordyasz, A, Kowalczyk, M, Khlebnikov, S, Koshchiy, E, Kozulin, E, Krogulski, T, Loktev, T, Mutterer, M, Piasecki, K, Piórkowska, A, Rusek, K, Staudt, A, Sillanpää, M, Smirnov, S, Strojek, I, Tiourin, G, Trzaska, WH, Trzcińska, A, Hagino, K & Rowley, N 2009, 'Effects of weakly coupled channels on quasielastic barrier distributions', Physical Review C - Nuclear Physics, vol. 80, no. 5, 054613. https://doi.org/10.1103/PhysRevC.80.054613

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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 Ne20+Zr90, we have observed the barrier structures expected for the highly deformed neon projectile; however, for Ne20+Zr92, 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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AU - Piasecki, E.

AU - Świderski, L.

AU - Gawlikowicz, W.

AU - Jastrzȩbski, J.

AU - Keeley, N.

AU - Kisieliński, M.

AU - Kliczewski, S.

AU - Kordyasz, A.

AU - Kowalczyk, M.

AU - Khlebnikov, S.

AU - Koshchiy, E.

AU - Kozulin, E.

AU - Krogulski, T.

AU - Loktev, T.

AU - Mutterer, M.

AU - Piasecki, K.

AU - Piórkowska, A.

AU - Rusek, K.

AU - Staudt, A.

AU - Sillanpää, M.

AU - Smirnov, S.

AU - Strojek, I.

AU - Tiourin, G.

AU - Trzaska, W. H.

AU - Trzcińska, A.

AU - Hagino, K.

AU - Rowley, N.

PY - 2009/11/25

Y1 - 2009/11/25

N2 - 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 Ne20+Zr90, we have observed the barrier structures expected for the highly deformed neon projectile; however, for Ne20+Zr92, 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.

AB - 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 Ne20+Zr90, we have observed the barrier structures expected for the highly deformed neon projectile; however, for Ne20+Zr92, 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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Effects of weakly coupled channels on quasielastic barrier distributions

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