Energy Transfer Kinetics and Dynamics of Relevance to Iodine Lasers
Abstract
NCl(a) is the energy carrier in the all gas phase iodine laser (AGIL). Studies of NCl(a,X) kinetics are being performed using photolysis of ClN3 as the source of the radical. Photodissociation of ClN3 is being characterized using photoionization mass spectrometry and time-resolved-resoled IR emission spectroscopy. The fluorescence quantum yield for NCl(a) has been estimated, and the products Cl+N3 detected. Theoretical studies of NCl+NCl reactions are in progress. For NCl(a)+NCl(a) the potential energy surface intersections responsible for the energy pooling process NCl(a)+NCl(a) -->NCl(b)+NCl(X) have been located. These intersections lie just above the entrance channel, and are accessible to thermal collisions. It is confirmed that rapid self-removal of NCl(X) (k-8 x 10(exp -12)/cu cm/s) proceeds via the reaction NCl(X)+NCl(X) -->N2+2Cl. Potential energy surfaces for the reaction Cl+N3-->NCl+N2 have been calculated. A barrier 16.6 kcal/mol barrier was located on the triplet surface, which accounts for the preference for singlet products. Branching ratio calculations are in progress. The reactions H+X2-->HX+X (x=F, Cl) are of importance in HX chemical lasers. The uncertainties associated with the rate constants are too large for accurate computational modeling of laser systems. These constants are being re-measured using photolysis/LIF probe techniques.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 25, 2001
- Accession Number
- ADA413428
Entities
People
- Alexey L Kaledin
- Keiji Morokuma
- Michael C Heaven
Organizations
- Emory University