Physics – Nuclear Physics
Scientific paper
Jul 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973nuphb..58...93c&link_type=abstract
Nuclear Physics B, Volume 58, Issue 1, p. 93-109.
Physics
Nuclear Physics
5
Scientific paper
The absolute intensity of muons has been measured at a vertical depth of 31.6 hg cm-2 below sea-level using a telescope which consisted of two arrays of crossed neon flash tube detectors triggered by a four fold Geiger counter coincidence. The use fo flash tubes to delineate the particle's trajectory allowed unambiguous identification of single particle traversals as well as enabling the acceptance solid angle to be defined with an error of only 0.5%. All triggering particles were required to traverse 10.3 cm of lead which together with all other material in the telescope provided an absorber thickness of 134 +/- 1 g cm-2 giving a total depth below the top of the atmosphere of 43.0 +/- 1 hg cm-2. The intensity measurements were performed with the axial direction of the telescope in the vertical direction and at zenith angles of 30°, 45° and 60° in the N-S azimuth. These measurements together with those of other workers have been used in the determination of a depth intensity curve.
Sea-level spectra for vertical incidence as well as for zenith angles of 30°, 45°, and 60°, have been derived using the equation which represents the diffusion of particles through the earth's atmosphere. These spectra normalized to the sea-level results reported previously by Crookes and Rastin have been used with the measurements made at the underground site to give a range-energy relationship. This relationship has been compared not only with the theoretical predictions but also with the measurements of Appleton et al. which can be used to provide a range-energy relationship by utilizing the depth-intensity curve obtained in this work.
Crookes J. N.
Rastin B. C.
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