High-Resolution Infrared Study of the ν7, ν8, and ν15 Bands and Millimeter-Wave Investigation of the v8 = 1 State of CF2Cl–CH3

Баскаков, О. І.; Ilyushin, V. V.; Alekseev, E. A.; Bürger, H.; Pawelke, G.

doi:10.1006/jmsp.2000.8130

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…We would like to point out that our measurements on sample A provide a clear example of the advantage of THz TDS over mid-infrared spectroscopy, in that it allows us to measure, in a nondestructive manner, the presence of a gas contained inside a medium. Although HCFC 142b absorbs in the mid-infrared, 13 the strong scattering of the foam in that frequency region makes it difficult to perform measurements.…”

mentioning

confidence: 99%

Terahertz dielectric properties of polystyrene foam

et al. 2002

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We have performed terahertz time-domain spectroscopy measurements on three types of polystyrene foam. We find that between 0.2 and 4 THz, the extinction of this material is low and that it has a remarkably low refractive index of 1.017 to 1.022 in this range, with little variation as a function of frequency. In foam produced with HCFC 142b gas (1-chloro-1,1-difluoroethane) as the blowing agent, we find an additional absorption band at 0.5 THz caused by rotational transitions in this gas. The low extinction and refractive index make polystyrene foam a very suitable material to be used as a dichroic filter that blocks the near-IR and transmits THz radiation with small losses of less than 1.5 cm Ϫ1 for frequencies of Ͻ4 THz, and as a substrate for THz imaging.

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confidence: 99%

Terahertz dielectric properties of polystyrene foam

et al. 2002

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“…Recently Baskakov et al [21] reported high resolution (0.0023 cm À1 FWHM) FTIR spectra of natural CH 3 CF 2 Cl and monoisotopic CH 3 CF 2 35 Cl (0.0029 cm À1 ) and obtained a very accurate analysis for the m 7 and m 8 fundamentals of both isotopic species ( 35 Cl and 37 Cl). Diode laser slit-jet spectra with a resolution of 0.001 cm À1 FWHM have been analyzed by Snels and D'Amico [22] revealing a weak b-type contribution to the dominantly a-type fundamental m 7 .…”

Section: Methodsmentioning

confidence: 98%

“…Moreover, the high resolution analysis of the m 5 fundamental [20], the mode with the largest share of C-C stretching according to Ref. [19], and of other A 0 (A 1 ) fundamentals [21] did not reveal torsional splittings. Therefore, this mechanism was discarded.…”

Section: Interactions With the Torsional Manifoldmentioning

confidence: 94%