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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>B</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:mi>e</mml:mi><mml:mo>(</mml:mo><mml:mi mathvariant="italic">p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo>)</mml:mo><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>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>Astrophysical<i>S</i>Factor from Precision Cross Section Measurements

A. JunghansCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USAE. C. MohrmannCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195K. A. SnoverCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195T. D. SteigerCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195E. G. AdelbergerCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195J. M. CasandjianCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195Howard E SwansonCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195L. BuchmannCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195S. H. ParkCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195A. A. ZyuzinCenter for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195

2002lv

ABI

Annotatsiya

We measured the ${}^{7}\mathrm{Be}(p,\ensuremath{\gamma}{)}^{8}\mathrm{B}$ cross section from ${\overline{E}}_{\mathrm{c}.\mathrm{m}.}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}186$ to 1200 keV, with a statistical-plus-systematic precision per point of better than $\ifmmode\pm\else\textpm\fi{}5%$. All important systematic errors were measured including ${}^{8}\mathrm{B}$ backscattering losses. We obtain ${S}_{17}(0)\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}22.3\ifmmode\pm\else\textpm\fi{}0.7(\mathrm{expt})\ifmmode\pm\else\textpm\fi{}0.5(\mathrm{theor})\mathrm{eV}\mathrm{b}$ from our data at ${\overline{E}}_{\mathrm{c}.\mathrm{m}.}\ensuremath{\le}300\mathrm{keV}$ and the theory of Descouvemont and Baye.

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Identifikatorlar

DOI: 10.1103/physrevlett.88.041101

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