Zobrazeno 1 - 10
of 250
pro vyhledávání: '"J.R. Birch"'
Publikováno v:
Vibrational Spectroscopy. 30:25-29
Many applications of mid-infrared (MIR) spectrophotometry now require known levels of uncertainty in both the abscissa and ordinate axes. The National Physical Laboratory (NPL) has long provided MIR transfer standards of regular transmittance, regula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f73763253189ce872b4942e5d0a714f
https://doi.org/10.1016/s0924-2031(02)00035-8
https://doi.org/10.1016/s0924-2031(02)00035-8
Autor:
J.R. Birch, Frank J. J. Clarke
Publikováno v:
Analytica Chimica Acta. 380:369-378
The presence of systematic ordinate errors in Fourier transform spectroscopy (FTS) is discussed, largely in terms of interreflection effects between the various interfaces of a two-beam interferometer and its adjacent optical components. Seven distin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60e91ff02c379017aea7fd63f38bcfc6
https://doi.org/10.1016/s0003-2670(98)00478-4
https://doi.org/10.1016/s0003-2670(98)00478-4
Autor:
Kong Fan Ping, J.R. Birch
Publikováno v:
Infrared Physics & Technology. 36:673-677
The optical constants of low density polyethylene in the spectral region from 30 to 120 cm −1 have been determined at a number of temperatures by the technique of dispersive Fourier transform spectroscopy. The temperatures were 6, 20, 40, 60, 80, 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79b7b8eb66e3efdd154f65b9a6a1189e
https://doi.org/10.1016/1350-4495(94)00097-5
https://doi.org/10.1016/1350-4495(94)00097-5
Publikováno v:
Infrared Physics. 34:299-302
The results of experiments aimed at establishing the origin of near millimetre wavelength magneto-optical effects observed in various ferrofluids are presented and discussed. These microscopic effects are probed at the macroscopic level by using an a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::177f40724af32916062aab1f429d08f7
https://doi.org/10.1016/0020-0891(93)90017-2
https://doi.org/10.1016/0020-0891(93)90017-2
Autor:
J.R. Birch
Publikováno v:
Infrared Physics. 34:89-93
A simple theory has been developed for the consequences of making dispersive Fourier transform spectroscopic measurements in a non-vacuum environment. Systematic errors are introduced which can be removed if the refractive index of that local atmosph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d710fe1c7681de1653aa1f6955db2ba
https://doi.org/10.1016/0020-0891(93)90038-9
https://doi.org/10.1016/0020-0891(93)90038-9
Autor:
J.R. Birch
Publikováno v:
Infrared Physics. 33:33-38
The far-infrared optical constants of polypropylene, PTFE and polystyrene have been determined in the spectral region between 50 and 500 cm −1 at a temperature of 290 K by the method of dispersive Fourier transform spectroscopy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50a3d580bcef923ed72e657fbb472f96
https://doi.org/10.1016/0020-0891(92)90052-u
https://doi.org/10.1016/0020-0891(92)90052-u
Publikováno v:
Infrared Physics. 33:293-299
The results of a Fourier transform spectroscopic study of the output spectrum of a germanium hot hole laser have allowed four distinct output regions between 1 and 270 cm −1 to be identified. These are below 10 cm −1 , from 40 to 60 cm −1 , fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa65728830727ef53a8ddf9f78388df5
https://doi.org/10.1016/0020-0891(92)90025-o
https://doi.org/10.1016/0020-0891(92)90025-o
Publikováno v:
Infrared Physics. 31:501-505
The temperature variation of the optical constants of the polymer polymethyl methacrylate (PMMA) have been determined in the spectral region between 10 and 30 cm−1 as a function of temperature between 153 and 293 K. The spectra clearly show the pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53c2a0093d72fdc7788a198c7281eed2
https://doi.org/10.1016/0020-0891(91)90029-f
https://doi.org/10.1016/0020-0891(91)90029-f
Autor:
R. M. Hooper, Michael R. Belmont, Elisabeth A. Nicol, J.R. Birch, J. L. Henshall, T.A. Ainscow
Publikováno v:
Infrared Physics. 31:561-570
This article examines the anisotropies in the long wavelength infrared spectra observed in strongly polar end-substituted straight chain alkanes. Comparison with the unsubstituted parent molecules suggest that dipole-dipole coupling is responsible fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e200bd10e38dcd27cf8833e2b58fced0
https://doi.org/10.1016/0020-0891(91)90143-4
https://doi.org/10.1016/0020-0891(91)90143-4
Autor:
K.H. Michaelian, J.R. Birch
Publikováno v:
Infrared Physics. 31:527-537
Previous strategies developed for averaging photoacoustic FT-IR interferograms have been extended to include the elimination of incoherent co-adding and the symmetrization of the interferograms. Incoherence of the interferograms can be reduced throug
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ddf10fc90f05c8a096b0361cfd9bcec
https://doi.org/10.1016/0020-0891(91)90033-c
https://doi.org/10.1016/0020-0891(91)90033-c