Direct Timing of Lifetimes of Vibrationally Excited Molecules before Decay by Radiation, Intersystems Crossing, or Collisions. High Resolution Lifetime Measurements.
Final rept. 2 Nov 71-31 Jul 74,
TECHNISCHE UNIVERSITAET MUNICH (WEST GERMANY) INSTITUT FUER PHYSIKALISCHE CHEMIE
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A method was developed for correlating phase excitation with a response of single photons. The correlation spectrometer was constructed in conjunction with a xenon light source and a monochromator. The limiting resolution comensurate with adequate signal strength was 10 reciprocal centimeters. A new method was initiated to enable one to make high resolution measurements of dynamic processes. High resolution was here defined as being in the picometer range, i.e., limited only by the Doppler profile of the line, analogous to the high resolution spectral information now available. A laser was constructed which could be narrowed and doubled to meet the needed requirements. The tunable dye laser was of the flash pumped design, and it was further decided to measure all absorption and emission parameters for each individual flash, employing a variable length folded path cell. In this way all kinetic parameters were determined.
- Atomic and Molecular Physics and Spectroscopy