"Massachusetts Institute of Technology. Center for Space Research," . . "X-ray telescopes." . . . . . . . . . . . . . . . . "Development of a mercuric iodide solid state spectrometer for X-ray Astronomy"@en . . . . . . "\"Mercuric iodide detectors, experimental development for astronomical use, X ray observations of the 1980 Cygnus X-1 High State, astronomical hard X ray detectors in current use, detector development, balloon flight of large area (1500 sq cm) Phoswich detectors, hard X ray telescope design, shielded mercuric iodide background measurement, Monte Carlo analysis, measurements with a shielded mercuric iodide detector are discussed.\"--NTIS abstract."@en . . . . "Spectrometers." . . "Iodides." . . "United States. National Aeronautics and Space Administration," . . "Monte Carlo method." . . . . "X-ray astronomy." . . "Mercury compounds." . .