Time resolved emission from OH(<i>C</i>2Σ+) produced by the pulse radiolysis of water vapor

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  • T. I. Quickenden
    Department of Physical and Inorganic Chemistry, University of Western Australia, Nedlands, W. A., 6009, Australia
  • J. A. Irvin
    Department of Physical and Inorganic Chemistry, University of Western Australia, Nedlands, W. A., 6009, Australia
  • D. F. Sangster
    Australian Atomic Energy Commission, Sutherland, N.S.W., 2232, Australia

抄録

<jats:p>Pulse radiolysis was used to study lifetimes and rate constants for quenching by H2O of water vapor fragments emitting in the range 210–360 nm. The radiative lifetimes of OH(C2Σ+, v=0,1), measured at the bandheads of the (1–8), (1–9), and (0–9) bands of the C2Σ+→A2Σ+ transition and analyzed by a deconvolution method were 3.8±0.5, 3.6±0.3, and 3.9±0.5 ns, respectively. Quenching rate constants at 292 K were (1.7±0.3) ×10−9, (1.6±0.2) ×10−9, and (2.2±0.3) ×10−9 cm3s−1 molecule−1 for these bands, (0.53±0.02) × 10−9 cm3s−1 molecule−1 for the OH A2Σ+ →X2Π, (0–0) band and (12.8±1.1) × 10−9 cm3s−1 molecule−1 for an unidentified band at 253–254 nm. The two long lived emissions reported by Remy [Spectrosc. Lett. 4, 319 (1971)] at the head of the (0–9) band of the OH C2Σ+ →A2Σ+ transition were not present.</jats:p>

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