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Reference.org
Multichannel analyzer
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<p>A multichannel analyzer (MCA) is an instrument used in laboratory and field applications to analyze an input signal consisting of voltage pulses. MCAs are used extensively in digitizing various spectroscopy measurements, especially those related to <a href="/facts/Nuclear_physics/fzQbt1aF">nuclear physics</a>, including various types of spectroscopy (alpha-, beta-, and <a href="/facts/Gamma_spectroscopy/sSsWI23T">gamma spectroscopy</a>). </p>