New precision measurement of the 3He(4He,γ) 7Be cross section

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

Research output: Contribution to journalLetter

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Abstract

The 3He(4He,γ) 7Be reaction plays an important role in determining the high energy solar neutrino flux and in understanding the abundances of primordial 7Li. This Letter 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.=420 to 950 keV. Various recent theoretical fits to our data result in a consistent extrapolated value of S34(0)=0.53(2)(1) keV b.
Original languageEnglish
Article number262503
Number of pages4
JournalPhysical Review Letters
Volume93
DOIs
Publication statusPublished - 29 Dec 2004
Externally publishedYes

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