Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977esasp.124..269a&link_type=abstract
In ESA Recent Advan. in Gamma-Ray Astronomy p 269-275 (SEE N78-11899 02-88)
Astronomy and Astrophysics
Astronomy
Astronomy, Galactic Radiation, Gamma Rays, International Cooperation, Angular Resolution, Calorimeters, Cerenkov Counters, French Space Program, Point Sources, Spark Chambers, Time Of Flight Spectrometers, U.S.S.R. Space Program
Scientific paper
Gamma I was designed to detect gamma-rays above 50 MeV in order to study the extraterrestrial high energy gamma radiation. The experiment consists of (1) two wide-gap spark chambers, the upper one being surrounded by a set of anticoincidence counters, (2) a triggering telescope which includes both Cerenkov and time-of-flight techniques for the rejection of moving-up particles, (3) a lead-plastic sandwich calorimeter, and (4) a video-recording device in order to handle the spark-chamber information. The angular resolution achieved with a scientifically representative model of the spark chamber is of order of 2 deg at 100 MeV. Sensible energy measurement can also be performed using the pair-electron diffusion for gamma ray energy less than or equal to 200 MeV. The effective area for detection of gamma-rays was estimated using the Monte Carlo method.
Akimov Vladlen V.
Bazer-Bachi R.
Cotin F.
Dobriyan M.
Fradkin M.
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