A Perkin-Elmer Model 83 Monochromator covering a spectral range from the ultraviolet to 5.5µ is used for determining the light intensity as a function of time of an explosion in a bomb. [Bullock, Hornbeck, and Silverman, J. Chem. Phys. <b>18</b>, 1114 (1950)]. The radiation entering the spectrometer is chopped to allow ac amplification of the detector output with provision to allow transmission as well as emission measurements. A frequency modulated pressure gauge is used to determine the pressure change in the bomb. Time resolution of the order of magnitude of 10<sup>-3</sup> sec may be obtained for both spectral and pressure observations. Results for typical carbon monoxide-oxygen explosions are shown. These preliminary results seem to indicate that there is equilibrium for approximately 0.02 sec after the flame front reaches the vessel wall.
B. W. BULLOCK and S. SILVERMAN, "Spectral and Pressure Observations of Explosion Phenomena," J. Opt. Soc. Am. 43, 389-389 (1953)