Air-broadened halfwidths and pressure-induced line shifts in the nu(4) fundamental of (13)CH(4) were determined from spectra recorded at room temperature and at 0.01-cm(-1) resolution using a Fourier transform spectrometer. Halfwidths and pressure shifts were determined for over 180 transitions belonging to J''values of =16. Comparisons of air-broadened halfwidths and pressure-induced line shifts made for identical transitions in the nu(4) bands of (12)CH(4) and (13)CH(4) have shown that (13)CH(4) air-broadened halfwidths are ~5% smaller than the corresponding (12)CH(4) halfwidths, and the pressure shifts for (13)CH(4) lines are ~5-15% larger than those for (12)CH(4).
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http://dx.doi.org/10.1364/AO.27.002296 | DOI Listing |
Biomech Model Mechanobiol
April 2023
Center of Excellence in Energy Conversion, School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
Atherosclerosis, due to the permeation of low-density lipoprotein (LDL) particles into the arterial wall, is one of the most common and deadly diseases in today's world. Due to its importance, numerous studies have been conducted on the factors affecting this disease. In this study, using numerical simulation, the effects of Wall Shear Stress (WSS), non-Newtonian behavior of blood, different values of hematocrit and blood pressure on LDL permeation into the arterial wall layers are investigated in a 4-layer wall model of a coronary bifurcation.
View Article and Find Full Text PDFJ Mol Spectrosc
June 2001
Department of Environmental, Earth, and Atmospheric Sciences, University of Massachusetts Lowell, 1 University Avenue, Lowell, Massachusetts, 01854
Pressure-broadened half-widths and pressure-induced line shifts for the two most important bands of water vapor in the 0.7-&mgr;m region are determined using the complex Robert-Bonamy (CRB) formalism. The calculations are made with nitrogen and oxygen as the perturbing gas from which values for air as the perturbing gas are determined.
View Article and Find Full Text PDFJ Mol Spectrosc
June 2000
California Institute of Technology, Jet Propulsion Laboratory, Pasadena, California, 91109
High-resolution measurements of air- and N(2)-broadened widths and pressure-induced frequency shifts of water vapor were obtained covering the spectral region between 604 and 2271 cm(-1). Over 1300 vibration-rotation transitions were measured including the (000)-(000), (010)-(010), (010)-(000), (020)-(010), and (100)-(010) vibrational bands of H(2)(16)O. Also included were measurements of H(2)(18)O and H(2)(17)O from normal water vapor samples and H(2)(18)O + N(2) observations with oxygen-18-enriched gas samples.
View Article and Find Full Text PDFJ Mol Spectrosc
July 1999
Department of Mechanical Engineering, Stanford University, Stanford, California, 94305-3032
High-resolution lineshapes of the HF P(3) and P(6) transitions (2-0 band) have been recorded in a 14.9-cm long absorption cell (T = 296 K) using a pair of (InGaAsP)-distributed feedback diode lasers operating near 1.31 and 1.
View Article and Find Full Text PDFJ Mol Spectrosc
February 1999
URA CNRS 259, Université des Sciences et Technologies de Lille I, Villeneuve d'Ascq Cedex, 59655, France
In this paper we report the results of both an experimental and theoretical study of the halfwidths of two transitions of water vapor. Measurements on the lines of the H216O and H218O isotopomers located at 325.1 and 203.
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