TY - JOUR
T1 - Pressure broadening of transitions in the CH3F υ4 band using Stark modulated Lamb dips
AU - Okabayashi, Yusuke
AU - Miyamoto, Yuki
AU - Tang, Jian
AU - Kawaguchi, Kentarou
PY - 2015/1/5
Y1 - 2015/1/5
N2 - A cw-OPO laser system has been used to measure pressure broadening coef.cients for the υ4 vibration-rotation transitions of CH3F by using Stark modulated Lamb dips. Eight pressure coefficients were determined from various pressure data, where each line shape was fitted to the Lorentzian function. The rQ(1,0) coef.cient was found to be largely different from that of rR(0,0), where the upper states of both transitions have the same J and K values but different parities of the l-type doublet. The coefficient for rQ(7,4) obtained in the present study agrees with that obtained by a Voigt pro.le analysis (Cartlidge and Butcher, 1990).
AB - A cw-OPO laser system has been used to measure pressure broadening coef.cients for the υ4 vibration-rotation transitions of CH3F by using Stark modulated Lamb dips. Eight pressure coefficients were determined from various pressure data, where each line shape was fitted to the Lorentzian function. The rQ(1,0) coef.cient was found to be largely different from that of rR(0,0), where the upper states of both transitions have the same J and K values but different parities of the l-type doublet. The coefficient for rQ(7,4) obtained in the present study agrees with that obtained by a Voigt pro.le analysis (Cartlidge and Butcher, 1990).
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U2 - 10.1016/j.cplett.2014.11.040
DO - 10.1016/j.cplett.2014.11.040
M3 - Article
AN - SCOPUS:84916919858
SN - 0009-2614
VL - 619
SP - 144
EP - 147
JO - Chemical Physics Letters
JF - Chemical Physics Letters
ER -