Spectroscopy of high-lying resonances in Be-9 by the measurement of (p, p), (p, d), and (p, alpha) reactions with a radioactive Li-8 beam

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Leistenschneider, E. ; Lepine-Szily, A. ; Alvarez, M. A. G. ; Mendes Jr, D. R. ; Lichtenthaler, R. ; Aguiar, V. A. P. ; Assuncao, M. ; Condori, R. Pampa ; da Silva, U. U. ; de Faria, P. N. ; Deshmukh, N. ; Duarte, J. G. ; Gasques, L. R. ; Guimaraes, V ; Macchione, E. L. A. ; Morais, M. C. ; Morcelle, V ; Pires, K. C. C. ; Scarduelli, V. B. ; Scotton, G. ; Shorto, J. M. B. ; Zagatto, V. A. B.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW C; v. 98, n. 6, p. 13-pg., 2018-12-05.

Resumo

We measured the Li-8(p, p)Li-8, Li-8(p, d)Li-7, and( 8 )Li(p, alpha)(5) He reactions at low energies using the thick target inverse kinematics method, with a polyethylene [CH2](n) target and a radioactive Li-8 beam available at the Radioactive Ion Beams in Brazil facility of S (a) over tildeo Paulo. By measuring simultaneously several reaction channels (p, p), (p, d), and (p, alpha), the still uncertain high-lying resonances of Be-9, close to the proton threshold, can be studied and their parameters, such as energy, width, and spin parity can be more reliably determined. The experimental excitation functions of the reactions Li-8(p, p)Li-8, Li-8(p, d)Li-7, and Li-8(p, alpha)(5) He were analyzed using the R-matrix theory, which allows us to infer the properties of the resonances. Multichannel R-matrix analysis provides evidence for a significant clustering in the (p, d) channel. The experimental data and the multichannel R-matrix analysis will be presented. (AU)

• Processo FAPESP: 11/15904-7 - Estudo do espalhamento elástico p(8Li,p)8Li em baixas energias
• Beneficiário: Erich Leistenschneider
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/22100-7 - Física de núcleos exóticos com o sistema RIBRAS
• Beneficiário: Rubens Lichtenthäler Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/21434-7 - Interação entre núcleos instáveis e alvos sólidos em baixas energias
• Beneficiário: Kelly Cristina Cezaretto Pires
• Modalidade de apoio: Auxílio à Pesquisa - Regular