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Title: Failure of the Woods-Saxon nuclear potential to simultaneously reproduce precise fusion and elastic scattering measurements

Abstract

A precise fusion excitation function has been measured for the {sup 12}C+{sup 208}Pb reaction at energies around the barrier, allowing the fusion barrier distribution to be extracted. The fusion cross sections at high energies differ significantly from existing fusion data. Coupled reaction channels calculations have been carried out with the code FRESCO. A bare potential previously claimed to uniquely describe a wide range of {sup 12}C+{sup 208}Pb near-barrier reaction channels failed to reproduce the new fusion data. The nuclear potential diffuseness of 0.95 fm which fits the fusion excitation function over a broad energy range fails to reproduce the elastic scattering. A diffuseness of 0.55 fm reproduces the fusion barrier distribution and elastic scattering data, but significantly overpredicts the fusion cross sections at high energies. This may be due to physical processes not included in the calculations. To constrain calculations, it is desirable to have precisely measured fusion cross sections, especially at energies around the barrier.

Authors:
; ; ; ;  [1];  [2]
  1. Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200 (Australia)
  2. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
Publication Date:
OSTI Identifier:
20995217
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevC.75.044608; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CARBON 12; DISTRIBUTION; ELASTIC SCATTERING; ENERGY RANGE; EXCITATION FUNCTIONS; FAILURES; LEAD 208; WOODS-SAXON POTENTIAL

Citation Formats

Mukherjee, A., Hinde, D. J., Dasgupta, M., Newton, J. O., Butt, R. D., and Hagino, K. Failure of the Woods-Saxon nuclear potential to simultaneously reproduce precise fusion and elastic scattering measurements. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.044608.
Mukherjee, A., Hinde, D. J., Dasgupta, M., Newton, J. O., Butt, R. D., & Hagino, K. Failure of the Woods-Saxon nuclear potential to simultaneously reproduce precise fusion and elastic scattering measurements. United States. doi:10.1103/PHYSREVC.75.044608.
Mukherjee, A., Hinde, D. J., Dasgupta, M., Newton, J. O., Butt, R. D., and Hagino, K. Sun . "Failure of the Woods-Saxon nuclear potential to simultaneously reproduce precise fusion and elastic scattering measurements". United States. doi:10.1103/PHYSREVC.75.044608.
@article{osti_20995217,
title = {Failure of the Woods-Saxon nuclear potential to simultaneously reproduce precise fusion and elastic scattering measurements},
author = {Mukherjee, A. and Hinde, D. J. and Dasgupta, M. and Newton, J. O. and Butt, R. D. and Hagino, K.},
abstractNote = {A precise fusion excitation function has been measured for the {sup 12}C+{sup 208}Pb reaction at energies around the barrier, allowing the fusion barrier distribution to be extracted. The fusion cross sections at high energies differ significantly from existing fusion data. Coupled reaction channels calculations have been carried out with the code FRESCO. A bare potential previously claimed to uniquely describe a wide range of {sup 12}C+{sup 208}Pb near-barrier reaction channels failed to reproduce the new fusion data. The nuclear potential diffuseness of 0.95 fm which fits the fusion excitation function over a broad energy range fails to reproduce the elastic scattering. A diffuseness of 0.55 fm reproduces the fusion barrier distribution and elastic scattering data, but significantly overpredicts the fusion cross sections at high energies. This may be due to physical processes not included in the calculations. To constrain calculations, it is desirable to have precisely measured fusion cross sections, especially at energies around the barrier.},
doi = {10.1103/PHYSREVC.75.044608},
journal = {Physical Review. C, Nuclear Physics},
number = 4,
volume = 75,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}