Accession Number:

ADA413428

Title:

Energy Transfer Kinetics and Dynamics of Relevance to Iodine Lasers

Descriptive Note:

Final rept. 1 Dec 2000-25 Aug 2001

Corporate Author:

EMORY UNIV ATLANTA GA DEPT OF CHEMISTRY

Report Date:

2001-08-25

Pagination or Media Count:

20.0

Abstract:

NCla is the energy carrier in the all gas phase iodine laser AGIL. Studies of NCla,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 NCla has been estimated, and the products ClN3 detected. Theoretical studies of NClNCl reactions are in progress. For NClaNCla the potential energy surface intersections responsible for the energy pooling process NClaNCla --NClbNClX 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 NClX k-8 x 10exp -12cu cms proceeds via the reaction NClXNClX --N22Cl. Potential energy surfaces for the reaction ClN3--NClN2 have been calculated. A barrier 16.6 kcalmol barrier was located on the triplet surface, which accounts for the preference for singlet products. Branching ratio calculations are in progress. The reactions HX2--HXX xF, 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 photolysisLIF probe techniques.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE