Cosmic-ray depth studies at the Homestake Mine with K-39 to A-37 detectors

Details Cosmic-ray depth studies at the Homestake Mine with K-39 to A-37 detectors Cosmic-ray depth studies at the Homestake Mine with K-39 to A-37 detectors

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aipc..126...22f&link_type=abstract

IN: Solar neutrinos and neutrino astronomy; Proceedings of the Conference, Lead, SD, August 23-25, 1984 (A86-37626 17-93). New Y

Astronomy and Astrophysics

Astronomy

3

Argon Isotopes, Cosmic Rays, Potassium 39, Radiation Measuring Instruments, Solar Neutrinos, Chlorine, Muons, Particle Interactions, Particle Production

Scientific paper

The argon-37 production rates in potassium detectors are measured at depths down to 4850 ft., which is the location of the chlorine solar neutrino detector in the Homestake Mine. The depth variation of the Ar-37 production rates in K agrees with that expected from cosmic ray muon interactions. At shallow depths, the Ar-37 production rates in K parallel those in Cl, with the Ar-37 rate per ton K equal to the Ar-37 rate per 615 tons of C2Cl4. At 4850-ft depth, the measurements give 0.07 + or - 0.07 Ar-37/day per ton of K, which is to be compared to the value of 0.46 + or - 0.04 Ar-37/day per 615 tons of C2Cl4 in the solar neutrino detector. The comparison indicates that there is an excess of Ar-37 over the cosmic-ray production in chlorine at 4850 ft depth; however, the error in the K measurements at 4850 ft depth is presently too large to determine accurately the cosmic ray background of the solar neutrino experiment. This error will be reduced by additional measurements.

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