Abstract
An intense 37Ar source was produced by the (n, α) reaction on 40Ca by irradiating 330 kg of calcium oxide in the fast neutron breeder reactor at Zarechny, Russia. The 37Ar was released from the solid target by dissolution in acid, collected from this solution, purified, sealed into a small source, and brought to the Baksan Neutrino Observatory, where it was used to irradiate 13 t of gallium metal in the Russian—American solar neutrino experiment SAGE. Ten exposures of the gallium to the source, whose initial strength was ∼ 409 ± 2kCi, were carried out during the period from April to September 2004. The 71Ge produced by the reaction 71Ga(ν e, e −)71Ge was extracted, purified, and counted. The measured production rate was 11.0 +1.0−0.9 (stat.) ±0.6 (syst.) atoms of 71Ge/d, which is 0.79 +0.09−0.10 of the theoretically calculated production rate.
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Gavrin, V.N., Abdurashitov, J.N., Barsanov, V.I. et al. Measurement of the response of a Ga solar neutrino experiment to 37Ar source. Phys. Atom. Nuclei 69, 1820–1828 (2006). https://doi.org/10.1134/S1063778806110032
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DOI: https://doi.org/10.1134/S1063778806110032