CW-Cavity Ring Down Spectroscopy of the ozone molecule in the 5980–6220cm−1 region

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

“…The ambiguities of the normal mode labelling of the observed upper states have been previously discussed [2][3][4]. On the basis of theoretical calculations using the 16 O 3 molecular potential energy surface (PES) of Refs.…”

“…[1,3]. The studied spectrum between 5903.4 and 5960.0 cm À1 corresponds to the spectral acquisition with two newly purchased DFB laser diodes, each of them having a typical tuning range of 7 nm ($30 cm À1 ).…”

“…The CW-CRDS spectrometer developed in Grenoble, has allowed for the new observations of a number of very weak bands of 16 O 3 between 5980 and 6830 cm À1 [1][2][3][4]. The present paper is devoted to the 5903.4-5960.0 cm À1 spectral region corresponding to the lower energy range accessible with this set-up.…”

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.…”