| Autor: |
F. D. Becchetti, R. E. Warner, J. S. Winfield, A. Nadasen, P. Schwandt, M. Fingal, J. Tavormina, M. McMaster, M. F. Mohar, J. W. Jänecke |
| Rok vydání: |
1989 |
| Předmět: |
|
| Zdroj: |
Physical Review C. 39:536-545 |
| ISSN: |
0556-2813 |
| DOI: |
10.1103/physrevc.39.536 |
| Popis: |
Differential cross sections for the elastic scattering of /sup 6/Li ions have been measured at a bombarding energy of 210 MeV. Angular distributions for /sup 28/Si (3.6/sup 0/--45.9/sup 0/), /sup 40/Ca (4.6/sup 0/--43.5/sup 0/), and /sup 90/Zr (4.0/sup 0/--43.6/sup 0/) extend sufficiently into the rainbow region to enable the extraction of unique /sup 6/Li potentials. For the /sup 208/Pb target (3.1/sup 0/--36.0/sup 0/), Coulomb scattering dominates with only a slight evidence of nuclear diffraction at the largest angles. The data were analyzed in terms of a six-parameter phenomenological optical-model potential with Woods-Saxon form factors. The unique potentials obtained show a weak target-mass dependence, which allowed the prediction of /sup 208/Pb potential parameters. Using the present results and lower energy analyses, an energy dependence for the /sup 6/Li-nucleus potentials was derived. For all targets, the volume integral per nucleon pair of the real potential seems to satisfy a logarithmic energy dependence of the form J/sub R//6A = J/sup 0//sub R//6A-..beta.. ln E/sub lab/ with J/sub R//sup 0//6A = 830 +- 30 MeV fm/sup 3/ and ..beta.. = 105 +- 5 MeV fm/sup 3/. This result is consistent with elastic scattering of other light ions. By truncating the angular distributions for themore » lighter targets up to the rainbow angle, several discrete potentials, corresponding to the different families found at lower energies, were obtained.« less |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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