TY - JOUR
T1 - Accurate transition frequency list of the ν3 band of methane from sub-Doppler resolution comb-referenced spectroscopy
AU - Abe, Masashi
AU - Iwakuni, Kana
AU - Okubo, Sho
AU - Sasada, Hiroyuki
PY - 2013/4
Y1 - 2013/4
N2 - We have carried out sub-Doppler resolution spectroscopy of the ν3 band of 12CH4 using a difference-frequency-generation source, an enhanced cavity absorption cell, and an optical frequency comb, and we have added 150 lines to the transition frequency list published earlier [Opt. Express 19, 23878 (2011)]. It now covers 204 lines from the P(12) to R(8) transitions, involving 21 weak forbidden transitions, with a typical uncertainty of 3 kHz for allowed transitions and 12 kHz for forbidden transitions. The combination differences between the allowed and forbidden transitions enable us to determine a scalar rotational constant and three scalar distortion constants of the ground vibrational state with greatly reduced uncertainties.
AB - We have carried out sub-Doppler resolution spectroscopy of the ν3 band of 12CH4 using a difference-frequency-generation source, an enhanced cavity absorption cell, and an optical frequency comb, and we have added 150 lines to the transition frequency list published earlier [Opt. Express 19, 23878 (2011)]. It now covers 204 lines from the P(12) to R(8) transitions, involving 21 weak forbidden transitions, with a typical uncertainty of 3 kHz for allowed transitions and 12 kHz for forbidden transitions. The combination differences between the allowed and forbidden transitions enable us to determine a scalar rotational constant and three scalar distortion constants of the ground vibrational state with greatly reduced uncertainties.
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U2 - 10.1364/JOSAB.30.001027
DO - 10.1364/JOSAB.30.001027
M3 - Article
AN - SCOPUS:84877629438
VL - 30
SP - 1027
EP - 1035
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
SN - 0740-3224
IS - 4
ER -