Gamma ray spectrometer
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Some constructions of scintillation counters can be used as gamma ray spectrometers. The gamma photon energy is discerned from the intensity of the flash of the scintillator, a number of low-energy photons produced by the single high-energy one. Another approach relies on using Germanium detectors - a crystal of hyperpure germanium that produces pulses proportional to the captured photon energy; while more sensitive, it has to be cooled to a low temperature, requiring a bulky cryogenic apparatus. Handheld and many laboratory gamma spectrometers are therefore the scintillator kind, mostly with thallium-doped sodium iodide, thallium-doped caesium iodide, or, more recently, cerium doped lanthanum bromide. Spectrometers for space missions conversely tend to be of the germanium kind.
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| NASA Jet Propulsion Laboratory Gamma Ray Spectrome... NASA Jet Propulsion Laboratory Gamma Ray Spectrometer page mars.jpl.nasa.gov/odyssey/technology/grs.html - Web |
| Mars Odyssey GRS instrument site Mars Odyssey GRS instrument site grs.lpl.arizona.edu - Web |
| Apollo 16 Gamma Ray Spectrometer Apollo 16 Gamma Ray Spectrometer www.lpi.usra.edu/expmoon/Apollo16/A16_Orbital_gamma.html - Web |
Gallery for «Gamma ray spectrometer»
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| NEAR Science instruments NEAR Science instruments near.jhuapl.edu/instruments/ - Web |
| Lunar Prospector's GRS Lunar Prospector's GRS lunar.arc.nasa.gov/results/gamma.htm - Web |
| Lunar Prospector's GRS Lunar Prospector's GRS nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1998-001A&ex=1 - Web |
