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Proceedings Paper

Study of the v1,v3 bands of 120SnH4: Part I--diode laser spectroscopy
Author(s): V. M. Krivtsun; D. A. Sadovskii; E. P. Snegirev
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Paper Abstract

An absorption spectrum of the SnH4 molecule has been measured with Doppler limited resolution in the region of 1903 - 1960 cm-1 by means of a tunable diode laser spectrometer. Infrared transitions of the Q- and R-branches of allowed (nu) 3 (F2) and 'forbidden' (nu) 1 (A1) bands were observed. These two states were found to be strongly mixed by the rotational-vibrational interaction, and as a consequence the (nu) 1 band appears in absorption. Wave numbers of transitions to the (nu) 1, (nu) 3 energy levels with the quantum number of angular momentum J equals 1 - 15 have been obtained with an accuracy of about 0.001 cm-1. More than 230 transitions of the 120SnH4 isotopic species were used for simultaneous analysis of the (nu) 1, (nu) 3 resonance states. In this way, 21 spectroscopic parameters of the upper states have been determined using a model Hamiltonian, which explicitly takes into account the resonance interaction. The parameters obtained reproduce the experimental spectrum with r.m.s. discrepancy of 0.002 cm-1.

Paper Details

Date Published: 1 April 1992
PDF: 17 pages
Proc. SPIE 1724, Tunable Diode Laser Applications, (1 April 1992); doi: 10.1117/12.58667
Show Author Affiliations
V. M. Krivtsun, Institute of Spectroscopy (Russia)
D. A. Sadovskii, Institute of Spectroscopy (Russia)
E. P. Snegirev, Institute of Spectroscopy (Russia)

Published in SPIE Proceedings Vol. 1724:
Tunable Diode Laser Applications

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