EXPERIMENTAL STUDY OF ATOM FLUORESCENCE LINES IN THE LASER PRODUCED PLASMA

Author Institution: Lebedev Physical Institute; Pacific: Oceanological Institute, Russian Academy of SciencesEmission line shapes of laser plasma generated on the surface of an aluminium are studdied experimentally, The shifts of the centers of self-reversed absorption lines with the wave Length 3962 A and 3944 A are registered. Two physical mechanisms of these shifts are discussed

HO2HO_{2} high resolution absorption spectrum identification in the 1.22−1.27μm1.22-1.27\mu m range.

Author Institution: Russia Academy of Sciences, Kosygina st. 4, 117 977 Moscow, Russia.; Russia Academy of Sciences, Kosygina st. 4, 117 977 Moscow, Russia.; Russia Academy of Sciences, Kosygina st. 4, 117 977 Moscow, Russia.; Russia Academy of Sciences, Kosygina st. 4, 117 977 Moscow, Russia.; Russia Academy of Sciences, Kosygina st. 4, 117 977 Moscow, Russia.; Russia Academy of Sciences, Kosygina st. 4, 117 977 Moscow, Russia.$HO_{2}$ radical high resolution spectra have been obtained by Intracavity Laser Absorption Spectroscopy (ICLAS) technique. Approximately 1200 rotational lines in $HO_{2}$ absorption spectra have been assigned in 1220-1270 nm range. It was found that vibrationnally excited $HO_{2}$ to be produced in some part as a product of the reaction $CH_{2}OH+O_{2}\rightarrow HO_{2} +CH_{2}O$. 266 lines belonging to $\Delta K = +1$ rotational subband with $K^{\prime\prime} = 0,1,2,3,4$ of the $HO_{2}$ hotband $A^{2}A^{\prime}(0,2,0) \leftarrow X^{2}A^{\prime\prime}(0,1,0)$ in the $7889-8239 cm^{-1}$ range have been identified. Spectroscopical constants for $A^{2}A^{\prime}(0,0,1), A^{2}A^{\prime}(0,2,0)$ have been obtained by LSQ fitting of the calculated $HO_{2}$ spectrum to the observed one with the use of Polo's formulae approximation for the rotational energy levels of near prolate asymmetric top together with $X^{2}A^{\prime\prime}(0,0,0)$ ground state $HO_{2}$ rotational constants known from literature

TIME RESOLVED ICLAS SPECTROSCOPY of HO2HO_{2} RADICAL

Author Institution: Department of kinetics and katalysis, N.N. Semenov Institute of Chemical Physics; Levedev Physical Institute, N.N. Semenov Institute of Chemical Physics$HO_{2}$ radical absorption spectrum was recorded in the 1.22-1.27 mkm range with the spectral resolution $0.13 cm^{-1}$ using intracavity laser absorption spectrometer based on $F^{+}_{2}$ color centers LiF laser. The rotationnaly resolved vibronic bands: (0,0,0)-(0,0,0), (0,2,0)-(0,1,0) and (0,0,2)-(0,0,1) of the $A^{\prime} - A^{\prime\prime}$ electronic transition were analyzed. The mechanism of the forbiden rotational subbands appearance will be discussed