Low-Energy Measurement of the B 7 e ( p , γ ) B</mml…
2001; American Physical Society; Volume: 86; Issue: 18 Linguagem: Inglês
10.1103/physrevlett.86.3985
ISSN1092-0145
AutoresF. Hammache, G. Bogaert, P. Aguer, C. Angulo, S. Barhoumi, L. Brillard, J. F. Chemin, Gérard Claverie, A. Coc, M. Hussonnois, M. Jacotin, J. Kiener, A. Lefébvre, C. Le Naour, S. Ouichaoui, J. N. Scheurer, V. Tatischeff, J. P. Thibaud, E. Virassamynaı̈ken,
Tópico(s)Nuclear Physics and Applications
ResumoWe have measured the cross section of the ${}^{7}\mathrm{Be}(p,\ensuremath{\gamma}{)}^{8}\mathrm{B}$ reaction for ${E}_{\mathrm{c}.\mathrm{m}.}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}185.8$, 134.7, and 111.7 keV using a radioactive ${}^{7}\mathrm{Be}$ target (132 mCi). Single and coincidence spectra of ${\ensuremath{\beta}}^{+}$ and $\ensuremath{\alpha}$ particles from ${}^{8}\mathrm{B}$ and ${}^{8}{\mathrm{Be}}^{*}$ decay, respectively, were measured using a large acceptance spectrometer. The zero energy $S$ factor inferred from these data is $18.5\ifmmode\pm\else\textpm\fi{}2.4\mathrm{eV}\mathrm{b}$ and a weighted mean value of $18.8\ifmmode\pm\else\textpm\fi{}1.7\mathrm{eV}\mathrm{b}$ (theoretical uncertainty included) is deduced when combining this value with our previous results at higher energies.
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