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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The Li-8(p, alpha)He-5 reaction at low energies, and Be-9 spectroscopy around the proton threshold

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Author(s):
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Mendes, Jr., D. R. [1] ; Lepine-Szily, A. [1] ; Descouvemont, P. [2] ; Lichtenthaeler, R. [1] ; Guimaraes, V. [1] ; de Faria, P. N. [1] ; Barioni, A. [1] ; Pires, K. C. C. [1] ; Morcelle, V. [1] ; Pampa Condori, R. [1] ; Morais, M. C. [1] ; Leistenschneider, E. [1] ; Lima, C. E. F. [1] ; Zamora, J. C. [1] ; Alcantara, J. A. [1] ; Zagatto, V. [1] ; Assuncao, M. [3] ; Shorto, J. M. B. [4]
Total Authors: 18
Affiliation:
[1] Univ Sao Paulo, Inst Fis, Dept Fis Nucl, BR-05315970 Sao Paulo - Brazil
[2] ULB, B-1050 Brussels - Belgium
[3] Univ Fed Sao Paulo, Dept Ciencias Exatas & Terra, Sao Paulo - Brazil
[4] Comissao Nacl Energia Nucl, Inst Pesquisas Energet & Nucl IPEN CNEN, Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Physical Review C; v. 86, n. 6 DEC 26 2012.
Web of Science Citations: 7
Abstract

We present a direct measurement of the low-energy Li-8(p, alpha)He-5 cross section, using a radioactive Li-8 beam impinging on a thick target. With four beam energies, we cover the energy range between E-c.m. = 0.2 and 2.1 MeV. An R-matrix analysis of the data is performed and suggests the existence of two broad overlapping resonances (5/2(+) at E-c.m. = 1.69 MeV and 7/2(+) at E-c.m. = 1.76 MeV). At low energies our data are sensitive to the properties of a subthreshold state (E-x = 16.67 MeV) and of two resonances above threshold. These resonances were observed in previous experiments. The R-matrix fit confirms spin assignments, and provides partial widths. We propose a new Li-8(p, alpha)He-5 reaction rate and briefly discuss its influence in nuclear astrophysics. DOI: 10.1103/PhysRevC.86.064321 (AU)

FAPESP's process: 08/09341-7 - The study of nuclei out of the stability line with beams of exotic nuclei
Grantee:Rubens Lichtenthäler Filho
Support type: Regular Research Grants
FAPESP's process: 03/10099-2 - The study of exotic nuclei with radioactive neams produced in the Pelletron-Linac laboratory of IFUSP
Grantee:Alinka Lépine
Support type: PRONEX Research - Thematic Grants