Photofragment-ion imaging
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Photofragment-ion imaging is an experimental technique for making measurements of the velocity of product molecules or particles following photodissociation of a parent molecule. The method uses a two-dimensional detector, usually a microchannel plate, to record the arrival positions of state-selected ions created by resonantly enhanced multi-photon ionzation (REMPI). The first experiment using photofragment-ion imaging was performed by David W Chandler and Paul L Houston in 1987 on the phototodissociation dynamics of methyl iodide (iodomethane, CH3I).[1].
[edit] Background
Many problems in molecular reaction dynamics demand the simultaneous measurement of a particle's speed and angular direction; the most demading require the measurement of this velocity in coincidence with internal energy. Studies of molecular reactions, energy transfer processes and photodissociation can only be understood completely if the internal energies and velocities of all products can be specified [2].
[edit] References
Whitaker, Benjamin J (ed.) (2003), Imaging in Molecular Dynamics, Cambridge University Press, ISBN 0 521 81059
[1] Chandler, David W. & Houston, Paul L. (1987), “Two-dimensional imaging of state-selected photodissociation products detected by multiphoton ionization”, J. Chem. Phys., 87: 1445-7, DOI 10.1063/1.453276
[2] Houston, Paul L. (1987), “Vector correlations in photodissociation dynamics”, J. Phys. Chem., 91: 5388-5397, DOI 10.1021/j100305a003
