Experimental gamma ray response function for the OSO-7 spacecraft

Higbie, P. R.; Forrest, D. J.; Gleske, I. U.; Chupp, E. L.; Burtis, D. W.

doi:10.1016/0029-554x(73)90651-4

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…Calibration response function data collected with the OSO-7 detector by Higbie et al (1973) was used for this purpose. Correction for these effects is of lesser importance with the OSO-7 detector than with an unshielded detector since the anticoincidence action of the Cs I shield reduces the Compton continuum and escape peaks by a factor of ~ 2.4.…”

Section: Deduction Of Continuum Photon Spectrummentioning

confidence: 99%

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Observations of solar gamma ray continuum between 360 keV and 7 MeV on August 4, 1972

et al. 1975

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Measurements were made of the time-averaged gamma ray energy loss spectrum in the energy range 360 keV to 7 MeV by the gamma ray detector on the OSO-7 satellite during the 3B flare on August 4, 1972. The differential photon spectrum unfolded from this spectrum after subtracting the background spectrum and contributions from gamma ray lines is best described by a power law with spectral index of 3.4d_0.3 between 360-700 keV and by an exponential law of the form exp (--E/Eo) with E0=l.0• MeV above 700 keV. It is suggested that this spectrum is due to nonthermal electron bremsstrahlung from a population of electrons, with a strong break in the spectrum at 2 MeV. Since the observational data indicates that the matter number density must be n~ ~> 5 • 101~ cm -a in the production region, the number of electrons above 100 keV required to explain the results is ~< 2 x 10 a4.

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Section: Deduction Of Continuum Photon Spectrummentioning

confidence: 99%

“…The photopeak sensitivity up to 3 MeV was obtained by Higbie et al (1973) for the OSO-7 detector. Above 3 MeV results of Monte Carlo calculations by Giannini et al (1970), for a parallel beam incident on a 3" x 3" Na I crystal were used.…”

Section: Deduction Of Continuum Photon Spectrummentioning

confidence: 99%