[PDF] Top 20 3-1 Fourier transform infrared spectrometer

... region, the deuterium lamp and photomultiplier tube were used. In order to collect the correct reflectance spectra data, we used Al mirrors as a reference in our measurements. A continuous flow helium cryostat was used ... See full document

... FTIR spectrometer operating in the absorption mode to characterize transient species in chemical reactions upon photo-irradiation of gaseous mixtures in a multipass White ...typically 1 -10 ms with spectral ... See full document

... A weak band near 1243 cm −1 might be assigned to the CH 2 twisting (ν 5 ) mode. Observed rotational contours of these bands also conform satisfactorily to those simulated accord- ing to rotational parameters ... See full document

... D 1 near 1902 cm −1 was observed along with features A 1 and A 2 in experiments with C 6 H 5 Br/CO/N 2 at the early stages after ...ν 1 = 1944 cm −1 for ClCO (ref 35) and 2028 cm ... See full document

... When the quantum-chemically predicted IR intensities are used, the population ratios of t-ClCOOH to c-ClCOOH can be estimated to be ⬃2.5⫾0.3 based on the observed integrated intensities of B1 and A1 ... See full document

... Step-scan Fourier transform spectrom eter; Inter- ferogram; Data acquisition; CH emission spectru ...step-scan Fourier transform spectrom- eter (FT S) from Bruker (IFS 88 Model) was commer- ... See full document

... cm 3 and an effec- tive path length of ...FTIR spectrometer. A commercial step-scan spectrometer 共Thermo Nicolet, Nexus 870兲 equipped with a fast mercury cadmium telluride 共MCT兲 detector 共20 MHz兲 and ... See full document

... Two rectangular 共3⫻12 cm 2 兲 quartz windows on the sides of the White cell allow passage of the photolysis laser beam that propagates perpendicular to the multipassing IR beam. The laser beam is multiply reflected ... See full document

... step-scan Fourier-transform spectrometer coupled with a multipass absorption cell was employed to record the time-resolved infrared 共IR兲 absorption spectra of reaction ... See full document

... an infrared beam back to the receiver, as shown in ...OP-FTIR spectrometer contained a mercury- cadmium-telluride detector with a resolution of 1 cm −1 , and detected molecules whose ... See full document

... the infrared photodis- sociation spectra of these ions carrying different numbers of ...no infrared spectra have been reported except that of McLafferty and ...mass spectrometer and a pulsed ... See full document

... By utilizing this simple spectrometer, the emission spectra of a high-power and high-efficiency THz photonic transmitter [2,3] excited by an optical coherent control system are determine[r] ... See full document

... This paper examines the feasibility of using Open-Path Fourier Transform Infrared Spectroscopy (OP-FTIR) to measure aerosols. The extinction spectra of water, ammonium nitrate, and ammonium sulfate ... See full document

... The default value, six electrons in six active orbitals, in the Gaussian program was used for the CASSCF calculations; the active space is defined assuming that the electrons come from the highest occupied orbitals in ... See full document

... Figure 5 illustrates the FTIR spectra of s-PS chain conformation ranging from 590 to 500 cm -1 for the neat s-PS and its hybrids that have underwent various thermal treatments. Preliminary deconvoluted analysis of ... See full document

... A generalization of Fourier trasform, FRFT, is treated as a rotation of signal in the time-frequency plane, so it satisfies the following rotation properties:.. The [r] ... See full document

... O( 1 D) with CHD 3 , the complex-forming reaction actually proceeds via a trapped abstraction mechanism, rather than an insertion mechanism as has long been ... See full document

... Clifford Fourier transform 3.1 Sparse fast Fourier transform Algorithms for computing the Fourier transform are inefficient because they take time proportional to ... See full document

... Pao-Erh Chang, Ruei-Hou Shie, Lung-Yu Sung, Jen-Chih Yang, and Jen-Wei Su Industrial Technology Research Institute, Hsin-chu, Taiwan, Republic of China ABSTRACT This paper presents the simulation and field evaluation ... See full document

... norbornadiene due to diffusion is plotted in Figure 2. The observed data are simulated with either one-dimensional or two- dimensional methods to determine the diffusivity. The resultant diffusion coefficients in the ... See full document