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Use of an optical multichannel analyzer for recording absorption spectra of short‐lived transients

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3 Author(s)
Hunter, E.P.L. ; Radiation Physics Division, National Bureau of Standards, Gaithersburg, Maryland 20899 ; Simic, M.G. ; Michael, B.D.

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Characteristics of an adapted commercial optical multichannel analyzer system for recording of transient absorption spectra in single‐shot pulse radiolysis and flash photolysis are described. The features discussed include temporal (2 μs) and spectral (1 nm) resolution, signal‐to‐noise ratio and its improvement, linearity of response, and wavelength coverage (300–650 nm). The system is intermediate in both cost and capabilities compared to two other methods: (1) recording transient spectra by repetitive pulsing and (2) using an image converter streak camera. This system is convenient for discrimination of small differences in fine structured absorption of spectra short‐lived species.

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Review of Scientific Instruments  (Volume:56 ,  Issue: 12 )