Výsledky vyhledávání - "H C W Beijerinck"

Progress towards atom lithography on iron

Autor: H. C. W. Beijerinck, B Bart Smeets, K. M. R. van der Stam, Robert E. Scholten, E. te Sligte, R. C. M. Bosch, K. A. H. van Leeuwen, Liam Maguire

Publikováno v: Microelectronic Engineering, 67-68(1-3), 664-669. Elsevier

We aim to apply atom optical techniques to iron to produce periodic magnetic nanostructures. Laser cooling has been observed experimentally, and calculations predict that a bright beam can be obtained with 200 µrad divergence. We expect to be able t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9971bacce42ab26fb54f6efc30525fe2
https://research.tue.nl/en/publications/6dc1c4d1-143b-484e-b51f-08a1d065df93

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An intense, slow and cold beam of metastable Ne(3s)P-3(2) atoms

Autor: P. G. M. Sebel, R. J. W. Stas, E.J.D. Vredenbregt, H. C. W. Beijerinck, J.G.C. Tempelaars

Publikováno v: Tempelaars, J G C, Stas, R J W, Sebel, P G M, Beijerinck, H C W & Vredenbregt, E J D 2002, ' An intense, slow and cold beam of metastable Ne(3s)P-3(2) atoms ', European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics, vol. 18, no. 1, pp. 113-121 . https://doi.org/10.1140/e10053-002-0013-8
European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics, 18(1), 113-121. Springer New York

We employ laser cooling to intensify and cool an atomic beam of metastable Ne(3s) atoms. Using several collimators, a slower and a compressor we achieve a ^{20}Ne^* flux of 6 10^{10} atoms/s in an 0.7 mm diameter beam traveling at 100 m/s, and having

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d814e93b82dc37099c6b56ed5190fae3
https://doi.org/10.1140/e10053-002-0013-8

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Prospects for Bose-Einstein condensation of metastable neon atoms

Autor: R. J. W. Stas, J.G.C. Tempelaars, E.J.D. Vredenbregt, M.R. Doery, H. C. W. Beijerinck

Publikováno v: Physical Review A : Atomic, Molecular and Optical Physics, 61(2):023607, 023607-1/15. American Physical Society
Physical Review A. Atomic, Molecular and Optical Physics, 61(2). American Physical Society
Beijerinck, H C W, Vredenbregt, E J D, Stas, R J W, Doery, M R & Tempelaars, J G C 2000, ' Prospects for Bose-Einstein condensation of metastable neon atoms ', Physical Review A. Atomic, Molecular and Optical Physics, vol. 61, no. 2 . https://doi.org/10.1103/PhysRevA.61.023607

The calculated upper limit Kipol state is used as input to investigate the prospects for achieving Bose-Einstein condensation (BEC). The heating rate of the trap population by secondary collisions of the hot products of the process of ionization—i.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::954bb5b07a1acdd41e611f6b5cf58725
https://research.tue.nl/en/publications/60ae9a4d-417a-45a2-b979-f69d40241c1c

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Long-range diatomic s + p potentials of heavy rare gases

Autor: J.G.C. Tempelaars, H. C. W. Beijerinck, M.R. Doery, BJ Boudewijn Verhaar, E.J.D. Vredenbregt

Publikováno v: Physical Review A : Atomic, Molecular and Optical Physics, 57(5), 3603-3620. American Physical Society

We examine the long-range part of the rare-gas diatomic potentials that connect to the $R{(n\ensuremath{-}{1)p}^{5}\mathrm{ns}}+R{(n\ensuremath{-}{1)p}^{5}\mathrm{np}}$ atomic states in the separated atom limit ($n=3,$ 4, 5, and 6 for Ne, Ar, Kr, and

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https://doi.org/10.1103/physreva.57.3603

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Ionization widths for Ne(3l)-Ar systems(l=s,p): Application to ionization and intramultiplet mixing cross sections

Autor: H. C. W. Beijerinck, W Wim Boom, BJ Boudewijn Verhaar, S.S. Op de Beek, Servaas Kokkelmans, J. P. J. Driessen

Publikováno v: Physical Review A. 56:2792-2805

{ital Ab initio} autoionization widths for the Ne(3s)-Ar and Ne(3p)-Ar systems are calculated in a two-electron approximation. Using correctly normalized wave functions, the calculations result in absolute values for the autoionization widths. We use

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5534c981e18b94d214885a8085d37cb7
https://doi.org/10.1103/physreva.56.2792

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Associative ionization in collisions between excited Na atoms in the and the states

Autor: J J Blangé, H Rudolph, H C W Beijerinck, H.G.M. Heideman, G Aben

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 30:2789-2800

For the first time, associative ionization has been observed in an atomic beam of excited sodium atoms in both the and the state. Relative values for the partial cross sections were obtained specified according to the different magnetic substate comb

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bfa0cbf0dcdedbcc0374559068e08b75
https://doi.org/10.1088/0953-4075/30/12/009

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Vibrational state distributions resulting from associative ionization in Na(3p) - Na(3p) collisions

Autor: H.G.M. Heideman, H A Dijkerman, J J Blangé, H C W Beijerinck, Xavier Urbain, H Rudolph

Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 30:565-581

We report on the vibrational energy distribution in Na-2(+)(X(2) Sigma(g)(+)) ions resulting from the associative ionization reaction between two Na(3p) atoms as determined via their wavelength-dependent photodissociation. Results at 10, 25, 85 and 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2d956afe141fead380860b6b401bc10c
https://doi.org/10.1088/0953-4075/30/3/013

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Si/XeF2 etching: Reaction layer dynamics and surface roughening

Autor: L. J. F. Hermans, H. C. W. Beijerinck, M. F. A. Eurlings, M. J. M. Vugts

Publikováno v: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 14:2780-2789

The etching of Si(100) is studied quantitatively in a molecular beam setup. After exposing the silicon surface to XeF2 doses between 102 and 104 monolayers (MLs) of XeF2, thermal desorption spectroscopy is used to study the SiFx content of the reacti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::afb3ab6d30eb6e4ffedd35ae37df0b13
https://doi.org/10.1116/1.580200

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Ion‐assisted Si/XeF2‐etching: Influence of ion/neutral flux ratio and ion energy

Autor: H. C. W. Beijerinck, L. J. F. Hermans, M. J. M. Vugts

Publikováno v: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 14:2138-2150

The Ar+ ion‐enhanced Si(100)/XeF2 reaction at 300 K is studied quantitatively in a molecular beam setup. Measurements are done for XeF2‐fluxes from 0.1 up to 3.4 monolayer/s, Ar+‐fluxes from 8×10−4 up to 8×10−2 monolayers/s and Ar+‐ener

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::71695eb1409cb9610b1e44bc434ed13b
https://doi.org/10.1116/1.580038

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Bright thermal atomic beams by laser cooling

Autor: H.J.L. Megens, H. C. W. Beijerinck, E.J.D. Vredenbregt, M.P. Schuwer, J. P. J. Driessen, Maarten Hoogerland, K. A. H. van Leeuwen

Publikováno v: Applied Physics B: Lasers and Optics, 62(4), 323-327. Springer

Using a three-step transverse laser cooling scheme, a strongly diverging flow of metastable Ne(3 s 3 P 2] atoms is compressed into a well-collimated, small diameter atomic beam (e.g., 1.4 mrad HWHM divergence at 3.6 mm beam diameter) with an unmodifi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6780c036ee89557fbf3ec99792cfbe06
https://research.tue.nl/en/publications/639681d1-ef7e-46d5-ad09-76bbabb2329a

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