FARADAY DISCUSSIONS OF THE CHEMICAL SOCIETY NO. 71 1981 High Resolution Spectroscopy THE FARADAY DIVISION THE ROYAL SOCIETY OF CHEMISTRY LONDONFARADAY DISCUSSIONS OF THE CHEMICAL SOCIETY NO. 71 1981 High Resolution Spectroscopy THE FARADAY DIVISION THE ROYAL SOCIETY OF CHEMISTRY LONDONA GENERAL DISCUSSION ON High Resolution Spectroscopy 13th, 14th and 15th April, 1981 A GENERAL Drscussro~ on High Resolution Spectroscopy was held a t the University of Bristol on 13th, 14th and 15th April, 1981. The President of the Faraday Division, Professor J. S. Rowlinson, F.R.S., was in the chair: about 150 Fellows of the Faraday Division and visitors from overseas attended the meeting. Among the overseas visitors were : Dr. J. A. Beswick, France Dr. P. Brechignac, France Prof.H. Burger, West Germany Dr. G. Cazzilo, ItaZy Dr. C. Cossart, France Prof. J. A. Coxon, Canada Mrs. C. Demuynck, France Dr. J. L. Destombes, France Dr. H. A. Dykerman, The Netherlands Dr. F. Engelke, West Germany Dr. K. M. Evenson, U.S.A. Prof. P. Favero, Italy Prof. R. Field, U.S.A. Mr. S . C. Foster, Canada Dr. J. Galica, West Germany Dr. R. D. Gordon, Canada Dr. G. Gouedard, France Prof. T. E. Gough, Canada Dr. W. Hack, West Germany Dr. M. Heaven, U.S.A. Dr. G. Herzberg, Canada Prof. E. Hirota, Japan Dr. Ch. Jungen, France Dr. L. Klynning, Sweden Dr. S. Leach, France Dr. B. Lingren, Sweden Dr. A. R. W. McKellar, Canada Dr. J. P. Maier, Switzerland Dr. T. A. Miller, U.S.A. Dr. E. Miiller Horsche, West Germany Dr. M. Quack, West Germany Dr. D. A. Rarnsay, Canada Dr.Al. Roche, France Mrs. J. Rostas, France Dr. G. Schmidtke, West Germany Prof. W. Urban, West Germany Prof. J. S . Winn, U.S.A. Dr. B. P. Winnewisser, West Germany Prof. M. Winnewisser, West Germany Prof. R. C . Woods, U.S.A.Organising Committee Prof. A. Carrington (Chairman) Dr. R. F. Barrow Dr. J. M. Brown Prof. R. N. Dixon Dr. P. B. Davies Dr. G. Duxbury Mrs Y. A. Fish Dr. D. M. Hirst Prof. I. M. Mills Prof. J. N. Murrell Prof. B. A. Thrush Dr. D. A. Young ISBN : 0-851 8671 8-9 ISSN 0301-7249 0 The Royal Society of Chemistry and Contributors, 1981. Printed in Great Britain by Fletcher & Son Ltd., NorwichA GENERAL DISCUSSION ON High Resolution Spectroscopy 13th, 14th and 15th April, 1981 A GENERAL Drscussro~ on High Resolution Spectroscopy was held a t the University of Bristol on 13th, 14th and 15th April, 1981.The President of the Faraday Division, Professor J. S. Rowlinson, F.R.S., was in the chair: about 150 Fellows of the Faraday Division and visitors from overseas attended the meeting. Among the overseas visitors were : Dr. J. A. Beswick, France Dr. P. Brechignac, France Prof. H. Burger, West Germany Dr. G. Cazzilo, ItaZy Dr. C. Cossart, France Prof. J. A. Coxon, Canada Mrs. C. Demuynck, France Dr. J. L. Destombes, France Dr. H. A. Dykerman, The Netherlands Dr. F. Engelke, West Germany Dr. K. M. Evenson, U.S.A. Prof. P. Favero, Italy Prof. R. Field, U.S.A. Mr. S . C. Foster, Canada Dr. J. Galica, West Germany Dr. R. D. Gordon, Canada Dr. G. Gouedard, France Prof. T. E. Gough, Canada Dr.W. Hack, West Germany Dr. M. Heaven, U.S.A. Dr. G. Herzberg, Canada Prof. E. Hirota, Japan Dr. Ch. Jungen, France Dr. L. Klynning, Sweden Dr. S. Leach, France Dr. B. Lingren, Sweden Dr. A. R. W. McKellar, Canada Dr. J. P. Maier, Switzerland Dr. T. A. Miller, U.S.A. Dr. E. Miiller Horsche, West Germany Dr. M. Quack, West Germany Dr. D. A. Rarnsay, Canada Dr. Al. Roche, France Mrs. J. Rostas, France Dr. G. Schmidtke, West Germany Prof. W. Urban, West Germany Prof. J. S . Winn, U.S.A. Dr. B. P. Winnewisser, West Germany Prof. M. Winnewisser, West Germany Prof. R. C . Woods, U.S.A.CONTENTS 191 205 21 3 233 253 273 287 30 1 Laser-induced Fluorescence of Trapped Molecular Ions: The CH+ A' I3 t X ' C.+ System by F. J. Grieman, B. H. Mahan, A. O'Keefe and J. S. Winn The 4114 A Absorption System of the HCCS Radical by S . L. N. G. Krishnamachari and D. A. Ramsay Doppler-limited Laser Spectroscopy of Electronic Transitions in SnO by M. A. A. Clyne and M. C. Heaven Crossed Laser and Molecular Beam Studies of Mixed Alkali Dimer: Prepara- tion, Perturbation and Predissociation by E. J. Breford, F. Engelke, G. Ennen and K. H. Meiwes Spectroscopy in the Ionisation Continuum: Vibrational Preionisation in H2 Calculated by Multichannel Quantum-defect Theory by Ch. Jungen and M. Raoult Local and Normal Vibrational States: a Harmonically Coupled Anharmonic- oscillator Model by M. S . Child and R. T. Lawton Exact Calculation of the Rotational- Vibrational Energy Levels of Triatomic Species by I. F. Kidd, G. G. Baht-Kurti and M. Shapiro GENERAL DISCUSSION 369 ADDITIONAL REMARKS 370 INDEX OF NAMES