Angular momentum dependent absorption inLi6scattering
| Autor: | J. D. Fox, D. Robson, A. D. Frawley, Edmund G. Myers, D. E. Trcka, K. W. Kemper |
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| Rok vydání: | 1990 |
| Předmět: | |
| Zdroj: | Physical Review C. 41:2134-2146 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.41.2134 |
| Popis: | Measurements are reported for (a) 50 MeV $^{6}\mathrm{Li}$${+}^{12}$C elastic and inelastic scattering to the ${2}^{+}$ (4.44 MeV), ${0}^{+}$ (7.65 MeV), and ${3}^{\mathrm{\ensuremath{-}}}$ (9.64 MeV) states in $^{12}\mathrm{C}$, (b) 20 MeV $^{6}\mathrm{Li}$${+}^{12}$C elastic scattering, (c) 50 MeV $^{6}\mathrm{Li}$${+}^{16}$O elastic and inelastic scattering to the unresolved ${0}^{+}$/${3}^{\mathrm{\ensuremath{-}}}$ (6.05/6.13 MeV) and ${2}^{+}$/${1}^{\mathrm{\ensuremath{-}}}$ (6.92/7.12 MeV) states in $^{16}\mathrm{O}$, and (d) 50 MeV $^{6}\mathrm{Li}$${+}^{9}$Be elastic and inelastic scattering to the 5/${2}^{\mathrm{\ensuremath{-}}}$ (2.43 MeV) state in $^{9}\mathrm{Be}$. Data were measured out to approximately 100${\mathrm{\ifmmode^\circ\else\textdegree\fi{}}}_{\mathrm{c}.\mathrm{m}.}$. A mid-angle plateau characteristic of $^{6}\mathrm{Li}$ scattering in the 5--10 MeV/nucleon energy range is confirmed in the $^{12}\mathrm{C}$ and $^{16}\mathrm{O}$ scattering but is not so apparent in the $^{9}\mathrm{Be}$ scattering.Two energy-dependent, six-parameter optical model potentials, both of which describe $^{6}\mathrm{Li}$${+}^{12}$C elastic scattering at $^{6}\mathrm{Li}$ bombarding energies of 11, 20, 24, 30, 50, 60, 99, 156, and 210 MeV through the forward angle region before the plateau, are coupled with an angular momentum dependent imaginary potential. The results show improved descriptions of the plateau region and back angle scattering and a better description of 30 MeV $^{6}\mathrm{Li}$${+}^{12}$C vector analyzing power data than has previously been published. The $^{6}\mathrm{Li}$${+}^{12}$C inelastic scattering data are described by distorted-wave-Born-approximation calculations. Results of a double folded analysis of $^{6}\mathrm{Li}$${+}^{12}$C elastic scattering at the above energies show a systematic variation of the double folded normalization, N, and the imaginary volume integral. $^{6}\mathrm{Li}$${+}^{16}$O, $^{9}\mathrm{Be}$ elastic scattering data are analyzed with optical model and double folded potentials and the inelastic scattering data are described with distorted-wave-Born-approximation calculations. |
| Databáze: | OpenAIRE |
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