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- W2013916439 abstract "A detailed report on a thermal beam of 2S metastable hydrogen (deuterium) atoms is given. This beam is produced in two steps: molecular dissociation in a radiofrequency discharge and electronic bombardment. We have obtained a good collimation (beam spread ≂0.8°) and a very accurate shielding against electric parasitic fields so that quenching losses from the source region to the detection region are reduced to ≂2%. Velocity distribution in the beam has been thoroughly studied. We have recently used this beam to remeasure the fundamental physical constant R∞ (Rydberg constant) with a very high accuracy, limited only by the wavelength and frequency standard in the optical region. The characteristics of such a beam, although specifically designed for this measurement, can also be interesting for different types of experiments." @default.
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- W2013916439 date "1990-05-01" @default.
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- W2013916439 title "A metastable hydrogen atomic beam: Construction and characteristics" @default.
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- W2013916439 doi "https://doi.org/10.1063/1.1141154" @default.
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