Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Be</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>7</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi> </mml:mi><mml:mi>γ</mml:mi><mml:mo>)</mml:mo><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">B</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>8</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>Reaction Cross Section at Low Energies
B. W. FilipponeArgonne National Laboratory, Argonne, Illinois 60439A. J. ElwynArgonne National Laboratory, Argonne, Illinois 60439C. N. DavidsArgonne National Laboratory, Argonne, Illinois 60439D. D. KoetkeArgonne National Laboratory, Argonne, Illinois 60439
1983lv
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Annotatsiya
The absolute total cross section for the reaction $^{7}\mathrm{Be}(p, \ensuremath{\gamma})^{8}\mathrm{B}$ has been measured for ${E}_{\mathrm{c}.\mathrm{m}.}=117\ensuremath{-}1230$ keV by detecting the delayed $\ensuremath{\alpha}$ particles following the $^{8}\mathrm{B}$ $\ensuremath{\beta}$ decay. Two independent methods have been used to determine the areal density of the $^{7}\mathrm{Be}$ target. The inferred zero-energy $S$ factor from the present experiment is ${S}_{17}(0)=0.0216\ifmmode\pm\else\textpm\fi{}0.0025$ keV b. This value reduces the predicted $^{37}\mathrm{Cl}$ solar-neutrino capture rate by \ensuremath{\sim}25%.
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