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The gamma ray spectrometer is one of the main scientific instruments carried by the "Chang'e-1". It is used to detect the distribution and content of useful elements on the surface of the moon, and to analyze the enrichment areas and distribution characteristics of various elements and material types. The gamma ray spectrometer was developed in 2001, and after hundreds of tests and tests, it was delivered to the satellite as a whole. This spectrometer, which looks like a small telescope, has a caliber of about 20 cm and weighs about 30 kg. On October 24, 2007, the "Chang'e-1" satellite flew.
According to Chang Jin, director of the gamma ray spectrometer sub-system, some elements on the surface of the moon (such as helium and uranium) are radioactive and emit gamma rays; others (such as silicon, magnesium, aluminum) are bombarded on cosmic rays. Gamma rays are also emitted below. The energy of different elements emitting gamma rays is different. "If the gamma ray spectrometer detects a gamma ray specific to an element, it can prove the existence of this element. The higher the probability of occurrence of this characteristic ray, the higher the relative content of the element. Through statistics, It is possible to detect the relative content of the elements, thereby drawing a full moon distribution map of various elements, and then discovering the lunar surface resource enrichment area, while identifying new rock types, and providing data on resource distribution for the development and utilization of the moon."
It is understood that during the work of the satellite around the moon for about one year, the gamma ray spectrometer will repeatedly fly through the various regions of the moon, and the detection data of each region will be accumulated and processed to obtain the accurate content of different elements in the region. information.
Lunar gamma ray spectrometer successfully turned on
The reporter learned from the Purple Mountain Observatory yesterday that on the evening of November 27, 2007, the lunar exploration gamma ray spectrometer developed by Zitai successfully turned on the "Chang'e-1" satellite, functioning normally, and has received scientific data.