LIST OF POSTERS Statistical Models for Intermolecular Energy Transfer I. Oref, 0. Herscovitz and E. Tzidoni Israel Institute of Technology, Haifa Classical Estimates of the Numbers of Normal, Local and Stochastic States of Polyatomic Molecules as Functions of Energy: Applications to H20 B. A. Ruf, J. T. Muckerman and C. J. Ashton Brookhaven National Laboratory, Upton, U.S.A., and D. W. Noid Oak Ridge National Laboratory, U.S.A. Semiclassical Theory of Resonances in 3D Xeactive Scattering E. Pollak Weizmann Institute of Science, Rehovot, Israel, and R. E. Wyatt University of Texas, Austin, U.S.A. Rotationally Resolved Photofragment Alignment : Photodissociation Dynamics in H20 and NH3 J. P. Simons and A. J. Smith University of Nottingham The Photodissociation of H20 at 157 nm: Full Internal State Distributions and Alignment of Nascent OH(X 'II) Radicals P.Andresen, G. S . Ondrey, E. W. Rothe and B. Titze Max-Planck-lnstitut, Gottingen, West Germany Dynamics of Photodissociation of HONO : Motional Anisotropy and Internal State Distribution of the OH Fragment R. N. Dixon University of Bristol, and R. Vasudev and R. N. Zare Stanford University, U.S.A. Production of CH(A 'A) by the UV Multiphoton Dissociation of (CH&CO T. Nagata, M. Suzuki, K. Suzuki, T. Kondow and K. Kuchitsu University of' Tokyo, Japan Multiphoton Ionisation Studies of Predissociation Mechanisms in Small Polyatomic Molecules M. N. R. Ashfold, J. M. Bayley, R. N. Dixon and R. J. Stickland University of Bristol Multipolar Evolution in Non-linear Optical Processes A. J.Bain and A. J. McCaffery University of Sussex The Propensity Rules Re-examined : Evidence for a Long-lived Complex in Alkali Diatomic - Rare Gas Collisions M. S. Mehde, F. J. M. Al-Imarah and A. J. McCaffery University of Sussex Molecular Beam Study of the Predissociation of SI Glyoxal-Evidence for the " Triple Whammy " J. W. Hepburn University of Waterloo, Canada, and R. J. Buss, L. J. Butler and Y. T. Lee University of California, Berkeley, U.S.A. Fluorescence Decay of Isolated Benzene Molecules at Vibrational Energies above the Channel 3 Threshold D. O'Connor, Y . Takagi, M. Sumitani, N. Nakashima, Y . Kamogawa, Y . Udagawa and K. Y oshihara Institute for Molecular Science, Okazaki, Japan Surprising Relaxation Behaviour of Electronically Excited Hexafluorobenzene J.L. G. Suijker, C. A. G. 0. Varma and A. H. Huizer State University at Leiden, The Nether- lands The Effect of Van der Waals Molecules' Lifetime on Their Reactions R. Naaman Weizmann Institute of Science, Rehovot, IsraelCollisional Effects in Infrared Laser Tnduced Multiphoton Absorption and Decomposition R. D. McAlpine and D. K. Evans Atomic Energy of Canada Ltd, Chalk Riuer, Canada Mode Selective Laser Chemistry of Ethylene X. de Hemptinne University of Leuven, Heverlee, Belgium A Theoretical Study of Laser-induced Isomerization in Trimethylenimine D. C. Clary and J. P. Henshaw UMIST Non-R.R.K.M. Decomposition from Chemically-activated Radicals Formed by Fluorine Atom Addition to Metallo-olefins in the Gas Phase F. S. Rowland and P. J. Rogers University of California, Iruinr, U.S.A.Competition between Tsomerization and Dissociation in the Unimolecular Chemistry of Energy Selected C5H1: Ions W. A. Brand and T. Baer University of North Carolina, Chapel Hill, U.S.A. Intramolecular Energy Redistribution in Polyatomic Cations C . Lifshitz Hebrew University of Jerusalem, Israel The Competition between Intramolecular and Intermolecular Energy Transfer in Ion Clusters A. J. Stace University of Southampton Evaluation of the Unimolecular Rate Constant Function k(E) from Field Ionization Kinetics (FIK) Data W. A. Brand and K. Levsen University of Bonn, West Germany The Role of Radiationless Processes in Intramolecular Energy Transfer R. T. Bailey, F. R. Cruickshank, D. Pugh, R. Guthrie and K. Middleton University of Strathclyde Nascent Vibrational Level Population Distributions following Thermal Decomposition Reactions C . J. S. M. Simpson, J. Chenery and J. Buxton University of Oxford Relaxation Channels of Vi brat ionally Excited Molecules Physically Adsorbed on Surfaces G. E. Ewing Indiana University, Bloomington, US. A.