Center, Los Angeles, CA 90009. It was reviewed and approved for The Aerospace Corporation by W. R. Warren, Jr., Director, Aerophysics Laboratory. Lieutenant James C. Garcia, SD/YLXT, was the project officer for Technology. This report has been reviewed by the Public Affairs Office (PAS) and is releasable to the National Technical Information Service (NTIS). At NTIS, it will be available to the general public, including foreign nations. This-.hnical report as been reviewed and is approved for publication. PublicationoTlf.ilTreport does not constitute Air Force approval of the report's findings or conclusions. It is published only for the exchange and stimulation of ideas.

It has been possible to obtain mirrors of very high reflectivity by following the simple four-step procedure described herein. The key to success is the ability to measure the scattering and other losses of the substrates and dielectric coatings to ensure that the specifications are being met. These measurements are especially critical in the important cleaning process. The cavity-attenuated phase-shift (CAPS) method is ideally suited for performing these important measurements, permitting us to obtain mirrors with reflectivities of R = 0.99975 +/- 0.00005.

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Center, Los Angeles, CA 90009. It was reviewed and approved for The Aerospace Corporation by W. R. Warren, Jr., Director, Aerophysics Laboratory. Lieutenant James C. Garcia, SD/YLXT, was the project officer for Technology. This report has been reviewed by the Public Affairs Office (PAS) and is releasable to the National Technical Information Service (NTIS). At NTIS, it will be available to the general public, including foreign nations. This-.hnical report as been reviewed and is approved for publication. PublicationoTlf.ilTreport does not constitute Air Force approval of the report's findings or conclusions. It is published only for the exchange and stimulation of ideas.

No abstract

Re-examination of current semiempirical methods for computing Einstein coefficients for diatomic molecules has resulted in the development of a new technique for predicting infrared transition probabilities. The method uses a nonlinear transformation of existing polynomial dipole expressions with the subsequent application of appropriate boundary conditions to arrive at improved dipole curves. The transition probabilities predicted for HF are found to yield the most consistent agreement with the available experimental data when compared with existing results. Reanalysis of experimental data by the use of the new transition probabilities yields an HF(v) distribution for the reaction, H + F2 → HF(v) + F, 0 ≤ v ≤ 9, that is in better agreement with independent theoretical predictions than the uncorrected distribution. The method has also been used to compute the Einstein A coefficients of DF, HCl, and DCl.

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