Title :
A Satellite-Borne High-Resolution Ge(Li) Gamma-Ray Spectrometer System Part 1: Description of the Instrument and Gamma-Ray Backgrounds in Earth Orbit
Author :
Nakano, G.H. ; Imhof, W.L. ; Johnson, R.G.
Author_Institution :
Space Sciences Laboratory Lockheed Palo Alto Research Laboratory 3251 Hanover Street Palo Alto, California 94304
Abstract :
Gamma radiation from terrestrial and extraterrestrial sources has been investigated for the first time with a high-resolution lithium-drifted germanium spectrometer-cryogen system flown on board a low-altitude, spin-stabilized, polar-orbiting satellite (1972-076B) launched on October 2, 1972. Gamma-ray pulses corresponding to energies between 40 keV and ~ 2.8 MeV are analyzed by a 4096-channel pulse-height analyzer with an overall system resolution of 3.5 - 4.0 keV FWHM (1.33 MeV Co60). A description of the instrument, its performance in earth orbit and preliminary results of the gamma-ray backgrounds are presented.
Keywords :
Detectors; Earth; Energy resolution; Extraterrestrial measurements; Gamma rays; Germanium; Instruments; Laboratories; Spectroscopy; Temperature;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1974.4327456
