Cosmic-ray depth studies at the Homestake Mine with /sup 39/K. -->. /sup 37/Ar detectors

Conference · Sun Jan 01 00:00:00 EST 1984

OSTI ID:6207558

Fireman, E L; Cleveland, B T; Davis, R Jr; Rowley, J K

The argon-37 production rates in potassium detectors are measured at depths down to 4850 ft (4000 m.w.e.), the location of the chlorine solar neutrino detector in the Homestake Mine. The depth variation of the /sup 37/Ar production rates in K agrees with that expected from cosmic ray muon interactions. At shallow depths, the /sup 37/Ar production rates in K parallel those in Cl, with the /sup 37/Ar rate per ton K equal to the /sup 37/Ar rate per 615 tons of C/sub 2/Cl/sub 4/. At 4850 ft depth, the measurements give 0.07 +- 0.07 /sup 37/Ar day/sup -1/ per ton of K, which is to be compared to the value of 0.46 +- 0.04 /sup 37/Ar day/sup -1/ per 615 tons of C/sub 2/Cl/sub 4/ in the solar neutrino detector. The comparison indicates that there is an excess of /sup 37/Ar 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. 11 references, 3 tables.

• Research Organization: Smithsonian Astrophysical Observatory, Cambridge, MA (USA); Brookhaven National Laboratory (BNL), Upton, NY (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6207558
• Report Number(s): BNL-35705; CONF-8408132-1; ON: DE85004710
• Resource Relation: Conference: Conference on solar neutrinos and neutrino astronomy, Lead, SD, USA, 23 Aug 1984; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RAY DETECTION
CHEMICAL RADIATION DETECTORS
SOLAR NEUTRINOS
MEASURING METHODS
POTASSIUM
ALKALI METALS
DETECTION
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
METALS
NEUTRINOS
RADIATION DETECTION
RADIATION DETECTORS
RADIATIONS
SOLAR PARTICLES
SOLAR RADIATION
STELLAR RADIATION
640101* - Astrophysics & Cosmology- Cosmic Radiation