Iodine laser temperature jump facility for relaxation studies with pure water as energy absorber
Abstract
A laser temperature jump facility is described, in which a photodissociation laser using perfluorisopropyliodide in pure water can produce a heat rise of 5-10 K in a characteristic time of 2.4 microsec. Absorption leads directly to generation of a harmonic oscillation in the solvent, water, which has an extinction coefficient of 0.76/cm for the laser wavelength of 1.315 microns. The chemical reactions, caused by the temperature jump, involving added substances can be followed optically. The detection system was designed for minimum signal-to-noise ratio. Optimal laser operation conditions were obtained by varying the flash lamp total pressure, laser total pressure, and the reflectivity of the uncoupling reflector.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- February 1976
- Bibcode:
- 1976PhDT........59W
- Keywords:
-
- Energy Absorption;
- Iodine Lasers;
- Laser Applications;
- Photodissociation;
- Pulsed Lasers;
- Relaxation Time;
- Absorptivity;
- Aqueous Solutions;
- Chemical Reactions;
- Dyes;
- Electromagnetic Absorption;
- Harmonic Oscillation;
- Monochromators;
- Signal To Noise Ratios;
- Thermodynamic Equilibrium;
- Lasers and Masers