Showing papers on "Fourier transform infrared spectroscopy published in 1974"
TL;DR: In this paper, the authors demonstrated that frequency-sweep excitation can provide the broad-band irradiation required to excite ion cyclotron resonances throughout any desired mass range.
355 citations
94 citations
TL;DR: In this article, the infrared spectrum of nitrous oxide has been measured and analyzed from 3000 cm −1 to 8200 cm − 1, and the spectra have been recorded with the Fourier transform interferometer of Laboratoire Aime Cotton.
74 citations
TL;DR: In this article, the excitation spectra of shallow acceptors in ultrapure germanium (109 cm-3 < NA − ND < 1012 cm -3) were studied using Fourier transform spectroscopy and photothermal excitation.
65 citations
TL;DR: In this article, the authors examined the theory and applications of Fourier transform spectroscopy and applied it to high-resolution infrared spectrography of astronomical objects using a Michelson interferometer.
Abstract: Publisher Summary This chapter examines the theory and applications of Fourier transform spectroscopy. A Michelson interferometer is ideally suited for work in high-resolution infrared spectroscopy of astronomical objects. In this application the available signal-to-noise ratio limits the number of observable objects and, therefore, any gain in signal-to-noise is of tremendous importance. The Michelson interferometer is a device for interfering two beams of light. Light entering the interferometer is divided into two separate beams by a beam splitter and is recombined after a controllable phase delay has been applied to one of the beams The use of digital computers in performing the Fourier transform of the interferogram, implies that the data be supplied in digital form. The effect of the slow-beat frequency is to make the contributions from spectral elements near the calculated element essentially positive rather than averaging to zero. The dispersive properties of the beam splitter can cause wave number-dependent phase shifts. The data recording and processing systems are as important as the optical and mechanical systems of the interferometer.
49 citations
TL;DR: In this paper, a Fourier transform spectrum (resolution 0.005 cm−1) of the ν4 band of methyl bromide has been analyzed and more than one thousand lines have been assigned for each isotopic species CH3 79Br and CH381Br.
41 citations
TL;DR: In this article, a two-beam interferometer was used to measure the absorption spectra of carbon monoxide, nitrous oxide and nitric oxide in the spectral region 15-40 cm−1, at a nominal resolution of 0.003 cm 1.
39 citations
20 citations
19 citations
01 Jan 1974
TL;DR: The application of Fourier Transform Spectrometers to laser Raman Spectroscopy is briefly discussed in this article, where fundamental limitations of the technique, its applications, and prognosis for the near future are noted.
Abstract: The application of Fourier Transform Spectrometers to Laser Raman Spectroscopy is briefly discussed. Fundamental limitations of the technique, its applications, and prognosis for the near future are noted. References which relate to calculations on input Rayleigh filtration requirements are listed.
11 citations
TL;DR: A Michelson interferometer was put into operation during the year 1972 at the Coude focus of the Haute-Provence Observatory's 76-in. telescope.
Abstract: A Michelson interferometer was put into operation during the year 1972 at the Coude focus of the Haute-Provence Observatory’s 76-in. telescope. We built this instrument at Aime Cotton Laboratory (Orsay-France) where the method of Fourier Transform Spectroscopy has been largely developed in the direction of very high resolution work. A complete description of this device has been given elsewhere (Guelachvili and Maillard, 1970) and further details on the present study are reported by Maillard (1973). We will only describe the main characteristic elements of the interferometer (Figure 1).
TL;DR: In this article, a far-infrared Fourier interferometer for amplitude-phase reflection spectroscopy on solids is described, which can be used with small samples at low temperatures and with fairly high resolution (<0.1 cm/sup -1/).
Abstract: A far-infrared Fourier interferometer for amplitude-phase reflection spectroscopy on solids is described. It can be used with small samples at low temperatures and with fairly high resolution (<0.1 cm/sup -1/). The spectral range presently is 10-1000 cm/sup -1/.
01 Jan 1974
01 Jan 1974
TL;DR: In this article, high-resolution spectra of Jupiter and Saturn were obtained with a Fourier Transform Michelson interferometer, after elimination of the solar and terrestrial contributions to absorption, with synthetic profiles for the reflecting layer model.
Abstract: High resolution spectra of Jupiter and Saturn were obtained with a Fourier Transform Michelson interferometer. A comparison of the observed spectra, after elimination of the solar and terrestrial contributions to absorption, with synthetic profiles for the reflecting layer model has permitted new determinations of the Lorentz half-width, the methane abundance, the rotational temperature and the pressure at the level of formation of the methane lines for both Jupiter and Saturn.
TL;DR: In this article, a Fourier transform spectrometer coupled with a long-path cell was used to record high resolution infrared spectra of air pollutants at very low concentrations, at room temperature, at a constant resolution of 0·5 cm-1, at partial pressures from 2·32 to 0·004 torr, N2 being the diluent.
Abstract: A Fourier transform spectrometer coupled with a long-path cell was used to record high resolution infrared spectra of air pollutants at very low concentrations. The spectral transmittance curves of CO were measured at room temperature, at a constant resolution of 0·5 cm-1, at partial pressures from 2·32 to 0·004 torr, N2 being the diluent. Apparent absorption coefficients were tabulated at 0·2-cm-1 intervals. The techniques and data are applicable to studies of our contaminated atmosphere.