Theoretical Evaluation of Neutron-nucleus Scattering Parameters from Experimental Data in the 6 ≤ A ≤ 60 Mass Region
| Autor: | T. Krasta, J. Tambergs, W. Waschkowski, S. Barkanova, K. Knopf, A. Aleksejevs |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Zeitschrift für Naturforschung A. 53:855-862 |
| ISSN: | 1865-7109 0932-0784 |
| Popis: | Systematic calculations of the neutron-nucleus scattering parameters at several neutron energies Ei < 2 keV have been performed for 37 isotopes (6Li,... 59Co) in the mass region of 6 ≤ A ≤ 60, using the large compilation of experimental neutron-nucleus scattering data obtained in Garching. In the first stage of these calculations, the s-wave potential scattering radius R’, the scattering lengths bcoh, b±, and the bound state parameters (Eb, Γγ , gΓ0 n) have been calculated for each isotope, employing the general least squares fit (GLSQF) for the experimental and the corresponding theoretical values of the total neutron-nucleus cross sections σexp tot(Ei) at several energies Ei, absorption cross sections σabs(Eo) and of the coherent scattering lengths bcoh. The theoretical expressions for these parameters were deduced on the basis of the usual S-matrix formalism with no assumption about the particular shape of the optical model potential. In the second stage of our calculations, the spherical Fiedeldey- Frahn optical potential was employed for the pure theoretical description or the above mentioned neutron-nucleus scattering characteristics. The results obtained have been analyzed and compared with the values deduced from measurements. |
| Databáze: | OpenAIRE |
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