Atmospheric gamma-ray spectrum between 10 and 100 MeV
An experiment made with a baloon-borne large volume (16×16×24 cm3) omnidirectional plastic scintillator sensitive to high-energy γ-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 a...
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| Autores principales: | , , |
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| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0004640X_v190_n2_p317_Azcarate |
| Aporte de: |
| Sumario: | An experiment made with a baloon-borne large volume (16×16×24 cm3) omnidirectional plastic scintillator sensitive to high-energy γ-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 γ-rays produced through interactions of the charged cosmic rays with the atmosphere. To unfold the observed pulse height spectrum and obtain the incident γ-ray spectrum, the detector response function is calculated numerically. By using this response function a differential flux d J/d E=(0.33±0.1)E-1.2±0.2 photons cm-2 s-1 MeV-1 averaged over all zenith angles, is estimated for the atmospheric γ-radiation, at 5 g cm-2, 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. © 1992 Kluwer Academic Publishers. |
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