Computer Science – Sound
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss..90..317a&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 90, no. 2, April 1992, p. 317-329. Research supported by Comision Nacional
Computer Science
Sound
Atmospheric Radiation, Balloon Sounding, Cosmic Rays, Gamma Ray Spectra, Balloon-Borne Instruments, Compton Effect, Geomagnetic Latitude, Radiation Detectors
Scientific paper
An experiment made with a balloon-borne large volume (16 x 16 x 24 cu cm) omnidirectional plastic scintillator sensitive to high-energy gamma-radiation is described. Two flights were carried out on 25 November, 1973 and 24 February, 1978 at high geomagnetic cut-off rigidities. For an omnidirectional detector and for energies greater than several MeV, most of the detected photons are secondary gamma-rays produced through interactions of the charged cosmic rays with the atmosphere. To unfold the observed pulse height spectrum and obtain the incident gamma-ray spectrum, the detector response function is calculated numerically. By using this response function a differential flux dJ/dE = (0.33 +/- 0.1)E exp -1.2 +/- 0.2 photons/sq cm s MeV averaged over all zenith angles, is estimated for the atmospheric gamma-radiation, at 5 g/sq cm, in the 10-100 MeV energy range. This result is compared with other observations made with different types of detectors and at different geomagnetic latitudes.
Azcarate I. N.
Ghielmetti H. S.
Mugherli V. J.
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