NSSDCA ID: 1962-006A-03
Mission Name: OSO 1This experiment was designed to measure the solar gamma-ray flux in the 0.1- to 0.7-MeV range, with particular emphasis on the 0.511-MeV positron-electron annihilation line and its temporal variation. Three scintillation counter detectors were used. Two NaI(Tl) detectors (3.8 cm in diameter by 3.8 cm high) were placed in the wheel section of the observatory, and a CsI(Tl) crystal (3.8 cm in diameter by 5.08 cm high) was placed in the pointed section. One of the spinning detectors was collimated with a tungsten shield to provide a 20-deg field of view. The other was unshielded to provide nearly isotropic detection and to provide a background control for the shielded detector. The output from each of the three scintillators was sampled sequentially through a 16-level pulse-height analyzer. Except for a shift in amplifier gain noted by a corresponding shift in the 0.511-MeV line, the experiment performed normally during the life of the satellite. For more details, see C. E. Fichtel, Sky & Teles., v. 35, p. 85, 1968.
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
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Mr. Kenneth J. Frost | Principal Investigator | NASA Goddard Space Flight Center |