Abstract
The elementary photophysical processes following the absorption of a VUV photon
(above 10 eV) by an isolated molecule are described. Special emphasis is made on
photoionization and photodissociation processes, on the basis of recent results obtained
by different experimental methods associated to synchrotron radiation. Discussion is
made within the frame of recent theories. Future trends are also mentioned in connection
with new synchrotron sources. NaI