Physics – Nuclear Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phrvl..52.1265p&link_type=abstract
Physical Review Letters (ISSN 0031-9007), vol. 52, April 9, 1984, p. 1265-1268.
Physics
Nuclear Physics
38
Extraterrestrial Radiation, Magnetic Monopoles, Particle Flux Density, Particle Tracks, Unified Field Theory, Absorption Cross Sections, Aluminum, Earth Crust, Manganese, Mica, Nuclei (Nuclear Physics), Magnetic Monopoles
Scientific paper
Results are presented from the first directs search for grand-unified-theory magnetic monopoles with adequate sensitivity to detect a flux as small as the Parker flux (Turner et al., 1983). It is pointed out that if stable monopole-nucleus bound states exist, then the observed absence of monopole tracks in the 4.6 x 10 to the 8th-yr-old mica detector places an upper limit of 10 to the -17th to 10 to the-16th/sq cm-sr-sec on the flux of grand-unified-theory monopoles having a velocity of 3 x 10 to the -4th c to 1.5 x 10 to the -3rd c. The scenario treated here has four aspects. The first is that monopoles enter the earth's atmosphere with a net electric charge less than or equal to zero. The second is that as the monopoles pass through the earth they eventually capture nuclei in bound states through magnetic dipole-magnetic monopole interaction. The third is that the nucleus-monopole composite passes through a naturally occurring underground sample of muscovite mica, undergoing elastic nuclear collisions that result in the formation of a trail of lattice defects in the mica. The fourth is that the track survives as long as the mica remains unheated and may be enlarged to macroscopic dimensions by retrieving the mica and etching it in hydrofluoric acid.
Ahlen Steven P.
Buford Price P.
Fleischer Robert L.
Guo S.-L.
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