Výsledky vyhledávání - "L. M. Fraser"

Elimination of Coulomb finite-size effects in quantum many-body simulations

Autor: Yan Wang, W. M. C. Foulkes, Gunaretnam Rajagopal, Mei-Yin Chou, Richard J. Needs, L. M. Fraser, Andrew Williamson

Publikováno v: R4854
R4851
Scopus-Elsevier

A model interaction is introduced for quantum many-body simulations of Coulomb systems using periodic boundary conditions. The interaction gives much smaller finite size effects than the standard Ewald interaction and is also much faster to compute.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08bb95d4088e770b27de860bee7b6091
https://doi.org/10.1103/physrevb.55.r4851

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Optimized wave functions for quantum Monte Carlo studies of atoms and solids

Autor: W. M. C. Foulkes, Steven D. Kenny, P. Maccullum, L. M. Fraser, Andrew Williamson, A. James, Richard J. Needs, Gunaretnam Rajagopal

Publikováno v: Scopus-Elsevier

Wave functions for the homogeneous electron gas, a germanium pseudosolid, and a germanium pseudoatom are optimized using the method of variance minimization. Forms for the Jastrow factor which are convenient to optimize and may be evaluated rapidly a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a544f6705aa22e27d1baa40b108c777
https://doi.org/10.1103/physrevb.53.9640

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Pulsed Source Atomic Fluorescence Spectrometry

Autor: J. D. Winefordner, N. Omenetto, L. M. Fraser

Publikováno v: Applied Spectroscopy Reviews. 7:147-182

Atomic fluorescence spectrometry was introduced as an analytical method in 1964 by Winefordner and Vickers [1], and since then, numerous papers have been published concerning the theoretical principles, instrumentation, methodology, and uses of the m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::887273941af66bdbcda3652b1b81b221
https://doi.org/10.1080/05704927308055758

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Laser excited atomic fluorescence of some transition elements in the nitrons oxide-acetylene flame

Autor: J.D. Winefordner, Nicoló Omenetto, N. N. Hatch, L. M. Fraser

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 28:65-78

A pulsed, tunable dye laser, pumped with a nitrogen laser is used to excite the atomic fluorescence of Sc, V, Hf, Nb, Os, Zr, W, Rh and Ru. Except in the case of Rh, the nitrous oxide-acetylene flame has been used. The results obtained for Zr and W a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d69f61f3e42c0a97e15c87a6ec982d7
https://doi.org/10.1016/0584-8547(73)80011-4

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A Combination Flame Atomic Fluorescence—Atomic Emission dc Spectrometer for Analysis of Trace Wear Metals in Jet Engine Oils

Autor: L. M. Fraser, J.D. Winefordner, R. L. Miller

Publikováno v: Applied Spectroscopy. 25:477-482

The combination of flame atomic fluorescence with a continuum source and flame atomic emission was found to provide a convenient method for analyzing Fe, Cu, Ag, and Mg in jet engine lubricating oils in the parts per million range. Dilution of the oi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75380d5a1df56ef6edda7bf3a108d4b4
https://doi.org/10.1366/000370271779950184

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