Double scatter telescope for medium energy gamma ray astronomy from a satellite

Details Double scatter telescope for medium energy gamma ray astronomy from a satellite Double scatter telescope for medium energy gamma ray astronomy from a satellite

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979itns...26..506z&link_type=abstract

(IEEE, DOE, NASA, and NBS, Nuclear Science Symposium, 25th, Washington, D.C., Oct. 18-20, 1978.) IEEE Transactions on Nuclear Sc

Astronomy and Astrophysics

Astronomy

Gamma Ray Astronomy, Scintillation Counters, Spaceborne Telescopes, Photomultiplier Tubes, Time Of Flight Spectrometers

Scientific paper

A large area (1 sq m) medium energy (1-30 MeV) telescope for gamma ray astronomy is discussed. This telescope utilizes the double scattering of gamma rays between two scintillator arrays with directional discrimination by means of time-of-flight. The first and second arrays consist of a series of plastic and NaI scintillators, respectively, in the shape of long (1 m) linear elements viewed by photomultiplier tubes at both ends. Neutron-induced background is eliminated by using a pulse shape discrimination plastic scintillator. At 6 MeV, the telescope has an area-efficiency factor of 300 sq cm, an energy resolution of 8% (FWHM) and an angular resolution of 3 deg (HWHM).

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