Dispersive optical-model and coupled-channels descriptions of neutron scattering from 27Al and 59Co up to 80 MeV

M. M. Nagadi, C. R. Howell, W. Tornow, G. J. Weisel, M. A. Al-Ohali, R. T. Braun, H. R. Setze, Zemin Chen, R. L. Walter, J. P. Delaroche, P. Romain

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Abstract

Differential cross sections σ(θ) and analyzing powers A y(θ) have been measured for neutron scattering from 27Al and 59Co at 15 MeV at the Triangle Universities Nuclear Laboratory using standard time-of-flight techniques. In addition, σ(θ) was measured for 59Co at 10, 12, 14, 17, and 19 MeV. Two large databases covering the energy range from 0.1 to 80 MeV were formed for these nuclei from this new data and previously published data, including that for the total cross section σT. These sets of data were analyzed using spherical dispersive optical-model (DOM) potentials, as well as coupled-channels model (CCM) potentials. The 59Co DOM gives good agreement with the σ(θ) data, except in the region of the first minimum. It also gives a reasonable description of our Ay(θ) measurement. The 27Al DOM gives good agreement with the data, except for σ(θ) at backward angles below 9.4 MeV and for σ T, for which there is up to 5% disagreement in the 10-50 MeV range. Compared to the DOM, the 59Co CCM calculations give improved agreement with the σ(θ) data, especially at the first minimum. The σT calculations agree with the data to within about 3% above 1.0 MeV. The three-level CCM calculations for 27Al give excellent agreement with the entire database.

Original languageEnglish (US)
Article number044610
Pages (from-to)446101-446108
Number of pages8
JournalPhysical Review C - Nuclear Physics
Volume68
Issue number4
StatePublished - Oct 2003

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Nagadi, M. M., Howell, C. R., Tornow, W., Weisel, G. J., Al-Ohali, M. A., Braun, R. T., Setze, H. R., Chen, Z., Walter, R. L., Delaroche, J. P., & Romain, P. (2003). Dispersive optical-model and coupled-channels descriptions of neutron scattering from 27Al and 59Co up to 80 MeV. Physical Review C - Nuclear Physics, 68(4), 446101-446108. [044610].