A (4+2) RESONANCE ENHANCED  MULTIPHOTON IONIZATION STUDY OF THE B1S+ STATE=
 OF CO

F.B.Yousif, I.Alvarez, C.Cisneros, J.de Urquijo, J.P.Flores

Centro de Ciencias  Fisicas, UNAM, P.O. Box  48-3, Cd. Post. 62251
Cuernavaca, Mor., Mexico

The four photon excitation of the B1S+ state has been investigated with
resonance enhanced multiphoton ionization spectroscopy with linearly
polarized light. The results show that the excitation to v=A2 =3D 0 is =
 dominant
in accordance with the theoretical predictions and the selection rules.