The temperature dependence of lineshifts, linewidths and line intensities of methane at low temperatures

Temperature dependence of self- and N2-broadeningand pressure-induced shifts in the 3←0 band of CO

“…[15] the shifts d 0 may be decomposed as a function of m into a symmetric component d 0-s and an antisymmetric component d 0-a : Indeed, the vibrational dephasing contribution d iso coming from the isotropic part of the potential is symmetric in the P-branch with respect to the R-branch, such as d iso ð2mÞ ¼ 2d aniso ðmÞ:…”

“…A different scaling law for the pressure shifts used by Varanasi's group [15] dðTÞ ¼ dð296 KÞðT=296 KÞ Our analysis using a Voigt profile modified with line mixing in the Rosenkrantz approximation also allowed us to investigate the asymmetric component of the profiles and retrieve the estimated room-temperature line mixing coefficients for CO and CO -N 2 . In our approach we have neglected the temperature dependence of the line mixing coefficients.…”

Collisional line shifting and broadening in the fundamental P-branch of CO in Ar between 214 and 324K

“…This power law was also used in the CO fundamental band study by Sung and Varanasi [7] and in an earlier methane study by Varanasi and Chudamani [22]. Unfortunately, none of [7,21,22] discusses how well Eq.…”

Temperature dependence of rotational relaxation of methane in the 2ν3 vibrational state by self- and nitrogen-collisions and comparison with line broadening measurements

“…The collisional broadening coefficients have been measured for various CH 4 transitions as a function of temperature for self-or N 2 -broadening [13][14][15][16][17][18][19][20][21]. Most of the data on IR lines have been plotted in Figs.…”