Search for superheavy monopoles in 65 KG of iron magnetic sand with a SQUID fluxmeter

Details Search for superheavy monopoles in 65 KG of iron magnetic sand with a SQUID fluxmeter Search for superheavy monopoles in 65 KG of iron magnetic sand with a SQUID fluxmeter

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jpsj...52.2617e&link_type=abstract

Physical Society of Japan, Journal (ISSN 0031-9015), vol. 52, Aug. 1983, p. 2617-2619.

Physics

5

Cosmic Rays, Magnetic Monopoles, Squid (Detectors), Iron, Magnetically Trapped Particles, Unified Field Theory

Scientific paper

A search was carried out for magnetically trapped monopoles in 65 kg of iron sand with a SQUID-search coil 80 mm in diameter, by heating the sample above its Curie point. No candidate event compatible with the passage of a single Dirac charge has been found. An upper limit of 1.5 x 10 to the -5th monopoles/g is set for the density of monopoles heavier than 2.5 x 10 to the 15th GeV/c-squared in the iron sand of 6-25 million years old. The flux of cosmic monopole is estimated at 1.3 x 10 to the -11th per sq cm sec sr according to the age and the density of the sample examined.

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