The IR acetylene spectrum in HITRAN: update and new results

Frequency comb assisted two-photon vibrational spectroscopy

“…This gives the line center as 3251.086908 (3) cm -1 , when the speed of the probed Doppler component is determined from the difference in the frequencies of the CRDS spectrum peaks. Previous measurements gives the line center as 3251.08683 cm -1 , with an accuracy reported as better than 0.001 cm -1 [37]. The total energy of the final rovibrational state, calculated as the sum of the two measured transition line centers and the rotational energy of the ground state [38], is 10059.186015 (31) cm -1 , where the precision is mostly limited by the uncertainty in the ground state rotational parameters.…”

Acetylene C<sub>2</sub>H<sub> 2</sub> retrievals from MIPAS data and regions of enhanced upper tropospheric concentrations in August 2003

“…The RFM is a line-by-line radiative transfer model based on the GENLN2 model (Edwards, 1992). The spectroscopic information is taken from the HITRAN2004 spectral database (Rothman et al, 2005;Jacquemart et al, 2003) and in this case the simulation uses a standard atmospheric climatology (Remedios et al, 2007) with an enhancement of the C 2 H 2 profile typical of biomass burning taken from Rinsland et al (2005). Fig.…”

“…The errors associated with the Gain, Shift and Spread were calculated using perturbations to the instrument line shape of 4 %, 2 % and 4 % respectively and an offset error of 2 nW/(cm 2 sr cm −1 ) was assumed, with these values taken from Fischer et al (2008). The error relating to the C 2 H 2 spectroscopy was conservatively assumed to be 5 % with Jacquemart et al (2003) giving an error of between 2 % and 5 %.…”

The vibration–rotation spectrum of 12C2HD: new overtone bands and global vibrational analysis

“…Other conditions were 0.025 cm À1 instrumental resolution and a cell with White type multipass optics set to 41 m total absorption pathlength. Table 2 Observed line wavenumbers (in cm À1 ) of the 2m 1 þ 2m 5 band in 12 Table 1 Rotational constants and band origins (in cm À1 ) in 12 The standard deviation (1r) is indicated in parentheses in the unit of the last quoted digit. a Constrained from [56].…”

“…Literature studies (with selected sets of references hereafter) were dedicated, in particular, to the modelling of the vibration-rotation bending states [1][2][3][4][5], the metrological investigation of the nv 3 series of vibration-rotation lines (position and intensity measurements) [6][7][8][9][10][11][12], the global modelling of the manifold of vibrational states up to very highly excited ranges [13][14][15], dynamical features [16][17][18][19][20][21], bond selected chemistry [20,22], high level ab initio calculations [23], and the application of a variety of ultra sensitive high resolution instrumental techniques [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. A detailed description of these various features, including a complete set of references about acetylene ground state up to 1998, is provided in [13].…”