Solar Neutrino Production of Long-Lived Isotopes and Secular Variations in the Sun

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Science  21 Nov 1980:
Vol. 210, Issue 4472, pp. 897-899
DOI: 10.1126/science.210.4472.897


Long-lived isotopes produced in the earth's crust by solar neutrinos may provide a method of probing secular variations in the rate of energy production in the sun's core. Only one isotope, calcium-41, appears to be suitable from the dual stand-points of reliable nuclear physics and manageable backgrounds. The proposed measurement also may be interesting in view of recent evidence for neutrino oscillations.