Direct detection of singlet oxygen O2(a1 Δg) by absorption at the a1 Δg → b1 Σg+ transition using intracavity laser spectroscopy

Autor: Pazyuk, V.S., Podmar'kov, Yu.P., Raspopov, N.A., Frolov, M.P.
Zdroj: Quantum Electronics; July 7, 2001, Vol. 31 Issue: 4 p363-366, 4p
Abstrakt: The absorption spectrum of singlet oxygen O2(a1 Δg) is detected in a gas phase at the a1 Δg → b1 Σg+ transition by the method of intracavity laser spectroscopy using a broad-band Co : MgF2 laser emitting 200-μs pulses at a wavelength 1.91 μm. In the case of Doppler broadening of absorption lines at room temperature, the sensitivity of detection of O2 (a1 Δg) is ~ (2 — 5) × 1014 cm-3 . It is shown that the gas temperature can be calculated from the dependence of absorption cross sections for individual lines on the rotational quantum number.
Databáze: Supplemental Index