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An apparatus has been developed for producing an atomic beam of potassium in the energy range of 0.2 to 45 eV (1000–15 000 m/sec). The technique used here is cathode sputtering. With a velocity selector (spread, 6.7%; maximum rotational speed, 48 000 rpm), both the signal of a Pt-W detector and an energy independent one are measured as a function of the velocity of the beam particles.
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Politiek et al. (1968) studied this question.
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