2005
DOI: 10.1088/0953-4075/38/15/009
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Atom diffraction with a ‘natural’ metastable atom nozzle beam

Abstract: The resonant metastability-exchange process is used to obtain a metastable atom beam with intrinsic properties close to those of a ground-state atom nozzle beam (small angular aperture, narrow velocity distribution). The estimated effective source diameter (15 µm) is small enough to provide at a distance of 597 mm a transverse coherence radius of about 873 nm for argon, 1236 nm for neon and 1660 nm for helium. It is demonstrated both by experiment and numerical calculations with He*, Ne* and Ar* metastable ato… Show more

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Cited by 17 publications
(24 citation statements)
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“…Also, the ultralow energy limit is discussed, presenting a large scattering length, and a probable large number of bounded states for the Ar* ( 3 P 0 and 3 P 2 ) + Ar system. At the end of this section, we shall explain why exchange of velocities from two different sources can be very efficient at much lower energy, justifying the results of [15] where final metastable state populations of 3 P 0 and 3 P 2 are in the proportion 33.8% to 66.2% rather than the usual stoichiometric proportion 1/6 to 5/6 obtained after electronic collisions.…”
Section: Introductionmentioning
confidence: 60%
“…Also, the ultralow energy limit is discussed, presenting a large scattering length, and a probable large number of bounded states for the Ar* ( 3 P 0 and 3 P 2 ) + Ar system. At the end of this section, we shall explain why exchange of velocities from two different sources can be very efficient at much lower energy, justifying the results of [15] where final metastable state populations of 3 P 0 and 3 P 2 are in the proportion 33.8% to 66.2% rather than the usual stoichiometric proportion 1/6 to 5/6 obtained after electronic collisions.…”
Section: Introductionmentioning
confidence: 60%
“…In the present experiment, this is achieved by using an ultra narrow metastable atom beam generated from a Camparguetype [2] nozzle beam of ground state atoms, by metastability exchange [3]. In the present experiment, this is achieved by using an ultra narrow metastable atom beam generated from a Camparguetype [2] nozzle beam of ground state atoms, by metastability exchange [3].…”
Section: Diffraction By a Magnetic Id Reflection Gratingmentioning
confidence: 71%
“…Note that it corrects the rather crude approximation given in Ref. [43]. The advantage of using a slow atomic beam with a well-defined velocity rather than a thermal beam derives from the fact that the atom-surface interaction poten-tial can be probed to a much higher accuracy.…”
mentioning
confidence: 67%