Measurement of vibrational-translational relaxation times

Abstract

CHAPTER 1. Introduction • • CHAPTER 2. Experimental methods for relaxation measurements: The Ultrasonic Interferometer • Sound Absorption • The Impact Tube • The Shock Tube • Spectroscopic methods • • CHAPTER 3. The Optic Acoustic effect: History of the optic acoustic effect • Application to the measurement of relaxation times • • CHAPTER 4 Theory of the Optic Acoustic effect: Basic treatment of energy transfer 1-1 • Limitations of the basic theory • Comparison with the results of other workers • Magnitude of the effect • • CHAPTER 5. Earlier experimental results • • CHAPTER 6. Experimental work: Introduction • 6.1 Experiments with a single-cell spectrophone: Design and construction of the instrument • The gas handling system • The optical system • Experimental procedure • Results • • 6.2 The double-cell spectrophone: Introduction • Design and construction of the spectrophone • The optical system • Electronics • The gases used • Experimental procedure • Experimental results • • 6.3 Experiments using two single-cell spectrophones Introduction • General description of the apparatus • Design and construction, of the spectrophones • The optical system • Electronics • The gases uses for the relaxation measurements • Experimental procedure • Experimental results • • CHAPTER 7. Discussion: Summary of results • Comparison with results of other workers • Comparison of results with theory • • CHAPTER 8. Suggestions for future experimental work: Numerical calculations of transition probabilities in molecular encounters • Introduction • The effect of the interaction potential on transition probabilities • The temperature dependence of relaxation time in nitrogen • Transition probabilities of related groups of polyatomic molecules • Transition probabilities of Group 4 hydrides and deuterides • Transition probabilities of Group 5 hydrides and deuterides • Conclusion • Appendix to Chapter 8 • • REFERENCES • • ACKNOWLEDGEMENTS