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The capture reaction 3He(c~, y)TBe has been investigated in the energy range of E .... = 107 to 1,266 keV. The 4He or 3He beams of up to 300 gA particle current were incident on 3He or 4He gas targets, respectively. The gas target systems were all of the windowless and recirculating type. Excitation functions have been obtained with the use of an extended-static gas target, while the measurements of y-ray angular distributions involved a quasi-point supersonic jet system. The determination of absolute cross sections has been carried out with both types of gas target systems. The 7-ray yields in the 3He(~, 7)7Be reaction were detected using 80 cm 3 Ge(Li) detectors. The data lead to a zero-energy intercept of the astrophysical S(E) factor of S(0)=0.30+0.03 keV-b. This result reduces the calculated solar neutrino rate by a factor of 1.76.Nuclear Reactions: 3He(~, 7)7Be, E ..... = 107 to 1,266 keV; measured o-(E, E~,, 07.); deduced spectroscopic factors and astrophysical S-factor; solar neutrino problem; extended and quasi-point jet gas targets, Ge(Li) detectors.

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