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A New Precision Measurement of the 3He(4He,gamma)7Be Cross section

B. S. Nara Singh·M. Hass·Y. Nir-El·G. Haquin
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Abstract

The 3He(4He,gamma)7Be reaction plays an important role in determining the high energy solar neutrino flux and in understanding the abundances of primordial 7Li. The present paper reports a new precision measurement of the cross sections of this direct capture reaction, determined by measuring the ensuing 7Be activity in the region of Ec.m.=400 keV to 950 keV. Various recent theoretical fits to our data result in a consistent extrapolated value of S34(0)=0.53(2)(1).

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B. S. Nara Singh, M. Hass, Y. Nir-El, G. Haquin. 2004-07-16. A New Precision Measurement of the 3He(4He,gamma)7Be Cross section. https://doi.org/10.1103/physrevlett.93.262503

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