Atmospheric secondary charged cosmic radiation at a place of 11.5 GV geomagnetic cut-off

Details Atmospheric secondary charged cosmic radiation at a place of 11.5 GV geomagnetic cut-off Atmospheric secondary charged cosmic radiation at a place of 11.5 GV geomagnetic cut-off

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17039a&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

An experiment performed with a balloon-borne plastic scintillator is described. The detector system was transported by a stratospheric balloon, that was launched from Reconquista, province of Santa Fe, Argentina, on 24 February 1992. The geomagnetic cut-off of the site was 11.5 GV. The energy-loss spectra of both the atmospheric gamma radiation ( for E^γ>= 4.15 MeV) and the charged component of the secondary cosmic radiation were alternatively measured at different altitudes, during the ascent of the balloon, and at ceiling altitude. The author analyzed the atmospheric gamma-ray spectrum in a previous paper ( Azcárate, 2000). It was necessary to perform the computation of the response of the detector to the charged radiation in order to explain , at least qualitatively, the energy-loss spectrum in the detector produced by this type of radiation. It is argued that at ceiling altitude the observed feature in the spectrum is produced mainly by relativistic muons falling horizontally upon the detector. The growth curve for the counting rate below this feature and the intensity of relativistic μ-mesons were also obtained. References : Azcárate, I.N., Revista Mexicana de Astronomía y Astrofísica, 36, 81, 2000.

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