Conclusions
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1.
The velocity distribution deviates considerably from maxwellian at p>10−2 mm Hg; the proportion of slow atoms is reduced.
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2.
The proportion of slow atoms is further reduced by a long exit channel, so it is undesirable to use such a channel at high pressures.
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3.
Our results may be compared with ones for cesium [4]; in our case, there is a much lower deficiency of slow atoms, which indicates greater scope for use of strong beams with selection of low velocities.
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4.
Quantitative calculations are possible for strong beams only if one was a velocity distribution corrected for atomic collisions during beam production.
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Additional information
Translated from Izmeritel'naya Tekhnika, No. 11, pp. 53–55, November, 1972.
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Abashev, Y.G., Voronin, G.F. & Valitov, R.A. Velocity distribution in an atomic beam. Meas Tech 15, 1679–1681 (1972). https://doi.org/10.1007/BF00813391
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DOI: https://doi.org/10.1007/BF00813391