The ν1+3ν2+3ν3 and 4ν1+ν2+ν3 bands of ozone by CW-cavity ring down spectroscopy between 5900 and 5960cm−1

CW-Cavity Ring Down spectroscopy of 18O3. Part 1: Experiment and analysis of the 6200–6400cm−1 spectral region

“…[2,3]. The band centre predictions obtained for 16 O 3 by using this PES were found accurate within 1 cm À1 [8][9][10][11][12][13]. The further comparison with our measurements shows that the accuracy of calculations using the same PES is quite similar for 18 O 3 .…”

“…The CW-CRDS spectra of 18 O 3 were recorded with the same CW-CRDS spectrometer as used in our previous studies of the main ozone isotopologue [8][9][10][11][12][13] and of other species of atmospheric importance such as H 2 O [24] and 12 CO 2 [25]. The detailed description of the fibered set up can be found in Refs.…”

“…In the case of the main isotopologue, the analysis of the CW-CRDS spectrum has been recently completed for the whole 5850-7000 cm À1 region [8][9][10][11][12][13]. As a result of the high sensitivity, a total of about 7500 transitions belonging to 21 vibrational states were assigned leading to the derivation of about 4000 energy levels.…”

The high sensitivity absorption spectrum of ozone (18O3 and 16O3) near 7800cm−1: Identification of the 3A2(000)–X(110) hot band superimposed to very weak vibrational bands

“…The residual absorption observed in the difference spectrum corresponds to the extremely weak vibrational bands with an intensity roughly divided by a factor of 2 (1-1/ 1.9 = 47%) compared to the 294 K spectrum. As an example, Figure 5 presents a vibrational band with a R branch head around 7912 cm À1 , showing the typical rotational structure of a A-type transition [8][9][10][11][12][13][14]. This band is the highest excited vibrational band observed so far in ozone by absorption spectroscopy.…”

“…A first series of contributions [8][9][10][11][12][13][14] was devoted to the 5850-7000 cm À1 region where a total of 21 and 16 bands were measured for 16 O 3 and 18 O 3 , respectively. The rovibrational analysis performed at GSMA Reims, used the effective operator approach and allowed for the derivation of the effective parameters of the corresponding Hamiltonian and transition moment operators.…”