Response of a Balloon-Borne Omnidirectional Detector to the Atmospheric Secondary Charged Cosmic Radiation at a Place of 11.5 GV Geomagnetic Cut-Off

Details Response of a Balloon-Borne Omnidirectional Detector to the Atmospheric Secondary Charged Cosmic Radiation at a Place of 11.5 GV Geomagnetic Cut-Off Response of a Balloon-Borne Omnidirectional Detector to the Atmospheric Secondary Charged Cosmic Radiation at a Place of 11.5 GV Geomagnetic Cut-Off

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001rmxaa..37..159a&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, Vol. 37, pp. 159-164 (2001)

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An experiment performed with a balloon-borne large plastic scintillator is described. The detector system was transported by a stratospheric balloon, that was launched from Reconquista, Provincia of Santa Fe, Argentina, on February 24, 1992. The geomagnetic cut-off of the site is 11.5 GV. The energy loss spectra of both the atmospheric gamma-radiation (for Eγ >= 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 atmospheric gamma-ray spectrum was analyzed in an earlier paper (Azcárate 2000). The shape of the energy loss spectrum due to charged radiation can be explained, at least qualitatively, by the computation of the response of the detector to this type of radiation. It is argued that, at ceiling altitude, the observed feature in the spectrum is due mainly to relativistic muons inciding horizontally on the detector. The growth curve for the counting rate below the peak and the intensity of relativistic μ mesons are also obtained.

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