DETERMINATION  OF  DIPOLE  MATRIX  ELEMENTS  AND  PHASE  SHIFTS  FROM
THE  MEASURED  ANGULAR  DISTRIBUTIONS  OF  PHOTOELECTRONS  FOR
FIXED-IN-SPACE  CO  MOLECULES

S.Motoki*+, J.Adachi$, Y.Hikosaka*, M.Sano*, E.Shigemasa*, K.Soejima++,
A.Yagishita*, K.Ito*, G.Raseev#  and N.A.Cherepkov*

*Photon Factory, High Energy Accelerator Research Organization, Oho 1-1,

Tsukuba-shi, 305-0801 Japan
+Graduate School of Science and Technology, Chiba University, Chiba,
263-8522 Japan
$ Institute of Molecular Science, Myodaiji, Okazaki 444, Japan
++Graduate School of Science and Technology, Niigata University, 8050
Ikarashi, Niigata-shi, Niigata 950-21 Japan
#Laboratoire de Photophysique Molequlaire, Batiment 210-213, Universite
de Paris-Sud, 91405 Orsay, France

For the first time a complete photoionization experiment is performed
for CO molecules in the ground state by extracting the dipole matrix
elements and phase shifts for both sigma and pi final states from the
measured angular distributions of photoelectrons ejected from O and C
K-shells of fixed-in-space molecules. The only parameter which remains
undefined is the relative phase shift between the sigma and pi final
states. The results are compared with the calculations performed in the
Hartree-Fock approximation.