Velocity mapping photoelectron images

The information contained in the energy-dependent photoelectron angular distributions Pk 0k, tpr) [Eq. (3.93)] may be conveniently visualized as velocity map images. Examples will be given in Sec. 5.4. Comparison of such images across different delay times tpr reveal the time evolution of the system. 

Note that the time-derivative is to be taken with respect to the change of the time-delay between the pump and probe lasers, tpr, and not with respect to t. An example will be shown in Secs. 5.4.2.4 and 5.4.3.3, illustrating that time-derivative photoelectron velocity map imaging can be quite helpful in uncovering and/or identifying useful characteristics of wavepacket motion, which may otherwise be overlooked in the original images. 

Fig. 5.26 (a) Computed femtosecond time-resolved photoelectron velocity map images... 

Fig. 5.30 (a) Femtosecond time-resolved photoelectron velocity map images without... 

Parker D, Eppink A. (1997) Photoelectron and photofragment velocity map imaging of state-selected molecular oxygen dissociation/ionization dynamics. J. Chem. Phys. 107 2357-2362. 

Parker D, Eppink A. (1997) Velocity map imaging of ions and electrons using electrostatic lenses Apphcation in photoelectron and photofragment ion imaging of molecular oxygen. Rev. Sci. Instr. 68 3477-3484. 

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