Efficient Chemical Production of Singlet Delta Oxygen.
Interim rept. 30 Jun 74-30 Sep 75,
FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY COLO
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This interim report discusses progress made during the period 30 June 1974 - 30 September 1975 for the FJSRL work unit 7903-03-69, Chemiluminescent Gas Phase Reactions. The objective of this study is to develop a chemical method for producing singlet delta oxygen in the gas phase and evaluating the singlet delta oxygen-I transfer chemical laser. A number of preliminary screening experiments were performed to identify the best method of production of singlet delta oxygen. The reaction system which produced the largest total yield of excited oxygen was found to be the Cl2-H2O2NaOH heterogeneous reaction system. The liquid phase was coated on a large surface area glass substrate. As Cl2 is a potential deactivant of atomic iodine, the reactor design must allow for complete reaction of the gaseous chlorine. This implies that the sticking coefficient of the Cl2 must be significantly greater than the deactivation probability of the singlet delta oxygen with the substrate material. The sticking coefficient was measured by following the drop in pressure as Cl2 absorbed on a coated surface. This pressure drop was observed using a recording mercury manometer developed for this study. The sticking probability of Cl2 on the substrate material was found to be 1 in every 3 collisions as opposed to a deactivation probability for singlet delta oxygen of 1 in every 100000 collisions. A preliminary run of a model reaction system was found to produce a singlet oxygen fraction greater than that observed in a microwave discharge. The total oxygen pressure was on the order of 0.2 torr.
- Lasers and Masers
- Quantum Theory and Relativity