Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1463l&link_type=abstract
Journal of Geophysical Research, vol. 82, Apr. 1, 1977, p. 1463-1473.
Astronomy and Astrophysics
Astronomy
6
Balloon-Borne Instruments, Gamma Rays, Radiation Measurement, X Ray Astronomy, X Ray Spectroscopy, Atmospheric Radiation, Background Radiation, Crab Nebula, Energy Spectra, Positron Annihilation, Radioactive Decay, Solar X-Rays, Spectral Line Width, X Ray Density Measurement
Scientific paper
A collimated high-resolution gamma ray spectrometer was flown on a balloon over Palestine, Texas, on June 10, 1974, to obtain measurements of the terrestrial and extraterrestrial 0.511-MeV gamma rays. The spectrometer consists of four 40-cu-cm Ge(Li) crystals operating in the energy range 0.06-10 MeV; this cluster of detectors is surrounded by a CsI(Na) anticoincidence shield. This system is used primarily to allow measurements of the two escape peaks associated with high-energy gamma ray lines. It also allows a measurement of the background component of the 0.511-MeV flux produced by beta(+) decays in materials inside the CsI(Na) shield. It is shown that the measurements of the atmospheric fluxes are consistent with earlier results after allowance is made for an additional component of the background due to beta(+) decays produced by neutron- and proton-initiated interactions with materials in and near the detector. Results of the extraterrestrial flux require an extensive detailed analysis of the time-varying background because of activation buildup and balloon spatial drifts.
Jacobson Seth A.
Ling James C.
Mahoney William A.
Willett J. B.
No associations
LandOfFree
Measurement of 0.511-MeV gamma rays with a balloon-borne Ge/Li/ spectrometer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Measurement of 0.511-MeV gamma rays with a balloon-borne Ge/Li/ spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of 0.511-MeV gamma rays with a balloon-borne Ge/Li/ spectrometer will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1617887