A measurement of the high energy secondary charged cosmic radiation

Details A measurement of the high energy secondary charged cosmic radiation A measurement of the high energy secondary charged cosmic radiation

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.208..125m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 208, no. 1, p. 125-133

Astronomy and Astrophysics

Astrophysics

Atmospheric Radiation, Energetic Particles, Gamma Rays, Radiation Spectra, Secondary Cosmic Rays, Balloon-Borne Instruments, Mesons, Scintillation Counters, Spectral Resolution

Scientific paper

An experiment performed with a balloon-borne large plastic scintillator is described. It was launched from Reconquista, province of Santa Fe, on 24 February, 1978. The energy loss spectra of both atmospheric gamma radiation (for Egamma greater than 4.15 MeV) and the charged component of the secondary cosmic radiation, were alternately measured at different altitudes, during the ascent of the balloon and at ceiling altitude. The atmospheric gamma radiation spectrum is analyzed in an earlier paper (Azcarate et al., 1992). The shape of the energy loss spectrum due to charged radiation is justified, in its more characteristic features, when the path length distribution in the detector of minimum ionization relativistic particles is taken into account. It is concluded that, at the ceiling altitude, the observed peak in the spectrum is due mainly to relativistic mu-mesons incident from the horizontal direction. The growth curve for the counting rate below the peak and the horizontal intensity of relativistic mu-mesons are also obtained.

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