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Low-Energy 3He(α, γ)7Be Cross-Section Measurements

Osborne, J. L. and Barnes, C. A. and Kavanagh, R. W. and Kremer, R. M. and Mathews, G. J. and Zyskind, J. L. and Parker, P. D. and Howard, A. J. (1982) Low-Energy 3He(α, γ)7Be Cross-Section Measurements. Physical Review Letters, 48 (24). pp. 1664-1666. ISSN 0031-9007. doi:10.1103/PhysRevLett.48.1664.

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The cross section and branching ratio for 3He(α, γ)7Be have been measured from Ec.m.=165 to 1170 keV by counting prompt γ rays from a windowless, recirculating, 3He gas target. Absolute cross sections were also measured at Ec.m.=945 and 1250 keV by measuring the 7Be activity produced in a 3He gas cell with a Ni entrance foil. The inferred zero-energy intercept is S34(0)=0.52±0.03 keV b. The effect of this extrapolated value on the solar-neutrino problem is discussed.

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Additional Information:©1982 The American Physical Society. Received 22 March 1982. We extend sincere thanks to Martin Weiss, M.D. for his expert repair of an important part of the appratus. This work was supported in part by the National Science Foundation under Grant No. PHY79-23638.
Issue or Number:24
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10026
Deposited By: Archive Administrator
Deposited On:07 Apr 2008
Last Modified:08 Nov 2021 21:04

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