Influence of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>6</mml:mn><mml:mo>,</mml:mo><mml:mn>7</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:math>breakup process on the near barrier elastic scattering by heavy nuclei
Auterives MacielInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilP. R. S. GomesInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilJ. LubiánInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilR. M. AnjosInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilR. CabezasInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilGuaciara M. SantosInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilC. MuriInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilS B MoraesInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilR. Liguori NetoInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilN. AddedInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilN. Carlin FilhoInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, BrazilClaudio TenreiroInstituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, Gragoatá, Niterói, R.J., 24210-340, Brazil
1999lv
ABI
Аннотация
Angular distributions of the elastic scattering of the ${}^{6,7}\mathrm{Li}$ on ${}^{138}\mathrm{Ba}$ were measured, in the energy range $21<~{E}_{\mathrm{lab}}<~32$ MeV. The analysis of the data was performed via the optical model, using the Woods-Saxon potential, in order to find the energy dependence of the real and imaginary parts of the nuclear potential. The existence of a threshold anomaly for the ${}^{7}\mathrm{Li}$ scattering and its absence for the ${}^{6}\mathrm{Li}$ one was observed. It is interpreted that the breakup of ${}^{6}\mathrm{Li}$, with dissociation energy smaller that its first excited state, is responsible for the vanishing of the threshold anomaly.
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