Zobrazeno 1 - 10
of 60
pro vyhledávání: '"R. J. C. Brown"'
Autor:
I. de Krom, W. Bavius, R. Ziel, E. A. McGhee, R. J. C. Brown, I. Živković, J. Gačnik, V. Fajon, J. Kotnik, M. Horvat, H. Ent
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 2317-2326 (2021)
A primary mercury gas standard was developed at Van Swinden Laboratory (VSL) to establish an International System of Units (SI)-traceable reference point for mercury concentrations at emission and background levels in the atmosphere. The majority of
Externí odkaz:
https://doaj.org/article/861844c3d77d4ecdbe991c4f0e715a36
Autor:
A. H. Tremper, A. Font, M. Priestman, S. H. Hamad, T.-C. Chung, A. Pribadi, R. J. C. Brown, S. L. Goddard, N. Grassineau, K. Petterson, F. J. Kelly, D. C. Green
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 3541-3557 (2018)
Measuring the chemical composition of airborne particulate matter (PM) can provide valuable information on the concentration of regulated toxic metals, support modelling approaches for source detection and assist in the identification and validati
Externí odkaz:
https://doaj.org/article/54007db831c048b8ae82dd9fa3f2888f
Publikováno v:
Journal of Analytical Atomic Spectrometry. 36:2704-2714
Tandem inductively coupled plasma mass spectrometry (ICP-MS/MS) with collision/reaction cell capability can achieve highly effective separation of spectral interferences. This improves confidence in measurement, reduces the detection limits achievabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da5fdf0b83624acb828914536cd9c2ce
https://doi.org/10.1039/d1ja00283j
https://doi.org/10.1039/d1ja00283j
Autor:
F. David Peat, R. J. C. Brown
Publikováno v:
International Journal of Quantum Chemistry. 1:464-474
Wave functions formed from geminals are discussed, in particular those formed from geminals which are eigenfunctions of the reduced Hamiltonian. An eigenvalue condition for the antisymmetry of such a wave function is given, and a variational procedur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87bd84e4708558fee3180a6c556bc06e
https://doi.org/10.1002/qua.560010651
https://doi.org/10.1002/qua.560010651
Publikováno v:
Journal of Raman Spectroscopy. 32:219-226
Raman spectra of polycrystalline ammonium fluoride and fully deuterated ammonium fluoride were recorded at various temperatures between 80 and 300 K. The spectra were obtained using a cold stage attached to a Raman microscope. At low temperatures the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd2740d5a7c23a4780465d853e0a81ba
https://doi.org/10.1002/jrs.690
https://doi.org/10.1002/jrs.690
Publikováno v:
Journal of Raman Spectroscopy. 32:996-999
The vibrational wavenumbers of crystalline ammonium fluoride were calculated using the density functional method. The results support the experimental conclusions that the symmetric stretching mode in NH4F lies at a higher wavenumber than the asymmet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6a6305a4e329f7ba53aaf9ac5a10504
https://doi.org/10.1002/jrs.787
https://doi.org/10.1002/jrs.787
Publikováno v:
Chemical Physics Letters. 320:487-491
Two alternative transition states for ammonium ion rotation in crystalline NH 4 F have been characterised using ab initio calculations. In one all the cations rotate in phase, while in the other the rotating ions are isolated from each other by non-r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::faefb31742f2af4c181e4e9707fe4b06
https://doi.org/10.1016/s0009-2614(00)00267-0
https://doi.org/10.1016/s0009-2614(00)00267-0
Publikováno v:
The Journal of Chemical Physics. 110:5861-5865
Ab initio density functional calculations have been carried out on ammonium fluoride to determine the equilibrium structure and the transition state for rotation of the ammonium ion. The calculated equilibrium geometry agrees satisfactorily with crys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c41e3723829cd2ac734cfc82c47af45b
https://doi.org/10.1063/1.478485
https://doi.org/10.1063/1.478485