A laser flash photo lysis-resonance fluorescence kinetic study: Reaction of O(3P) with O3

DYNAMICS OF O + O3 REACTION ON A NEW POTENTIAL ENERGY SURFACE FOR GROUND-TRIPLET TETRAOXYGEN: SPECTATOR BOND MECHANISM REVISITED

We report a dynamics study of the reaction [Formula: see text] using an improved double many-body expansion (DMBE II) potential energy surface for the ground triplet state of O 4. Values of the calculated cross section, vibrational and rotational distributions, as well as thermal rate coefficient as a function of temperature are given. While some discrepancy with experiment is found in the rotational distribution of the product O 2 molecules with vibrational quantum number v = 12, the agreement is quite good for the thermal rate coefficient over the whole range of temperatures where theory and experiment overlap. No breakdown of a previously suggested spectator bond mechanism is observed. Reasons to support such an evidence are given from ab initio calculations by looking at the variation of the energy and calculated bond distances as a function of the intrinsic reaction coordinate along the products channel.

Possible high energy laser at 1.27 microm

Preliminary theoretical and experimental evidence is presented that suggests the potential of lasing from the strongly forbidden O(2)((1)Delta(g)) ? C(2)((3)Sigma (-)(g)) transition of molecular oxygen. A rate equation model is developed which predicts pulse energies up to several hundred joules/liter atmosphere for typical mixtures of 10(3):2N(2) activated by uv photolysis in less than 10 microsec. Preliminary results from a flash photolysis laser apparatus demonstrating 1.27-microm lasing are presented. Results from a computer analysis assessing the possibility of using this system as a multipass amplifier are also given.