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Alpha Particle X-Ray Spectrometer

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An Alpha Particle X-Ray Spectrometer is a device that analyses the chemical element composition of a sample from the scattered alpha particles, and fluorescent X-rays after the sample is irradiated with alpha particles and X-rays from radioactive sources.[1] Since there are faster methods available which do not use radioactive material to analyse the elemental composition of a sample, this compact and low power method is most often used on space missions. A variation is the Alpha Proton X-Ray Spectrometer, such as on the Pathfinder mission, which also detects protons. The common abbreviation is APXS.


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