  Photoelectron circular dichroism (PECD) is a fascinating phenomenon both from
a fundamental science aspect but also due to its emerging role as a highly
sensitive analytic tool for chiral recognition in the gas phase. PECD has been
studied with single-photon as well as multi-photon ionization. The latter has
been investigated in the short pulse limit with femtosecond laser pulses, where
ionization can be thought of as an instantaneous process.
  In this contribution, we demonstrate that multiphoton PECD still can be
observed when using an ultra-violet nanosecond pulse to ionize chiral showcase
fenchone molecules. Compared to femtosecond ionization, the magnitude of PECD
is similar, but the lifetime of intermediate molecular states imprints itself
in the photoelectron spectra. Being able to use an industrial nanosecond laser
to investigate PECD furthermore reduces the technical requirements to apply
PECD in analytical chemistry.

Chemical Physics;Atomic Physics