  Hexapole oriented 2-bromobutane is photodissociated and detected by a slice
ion imaging technique at 234 nm. The laser wavelength corresponds to the C Br
bond breaking with emission of a Br atom fragment in two accessible fine
structure states: the ground state Br and the excited state Br*, both
observable separately by resonance enhanced multiphoton ionization (REMPI).
Orientation is evaluated by time of flight measurements combined with slice ion
imaging.
