DOUBLE PHOTOEXCITATION FROM LASER EXCITED Li(1$s^2$2$p$)

M.-T. Huang,$^*$ R. Wehlitz,$^*$ S.~Hasegawa,$^{\#}$ K.~Ohmori,$^{\dag}$
I.~A.~Sellin$^{\ddag}$ 
 and Y. Azuma$^*$


$^*$ {\rm Photon Factory, IMSS, KEK, Tsukuba, Ibaraki 305-0801,
Japan}\\
$^{\#}$ {\rm Faculty of Engineering, University of Tokyo, Bunkyo-lu, Tokyo
113, Japan}\\
$^{\dag}$ {\rm RISM, Tohoku University, Sendai 980-77, Japan}\\
$^{\ddag}$ {\rm Department of Physics and Astronomy, University of Tennessee, 
Knoxville, TN 37996-1200, USA}\\


Even parity doubly excited states of lithium from laser excited
Li(1$s^2$2$p$)$^2P_0$ targets have been observed by
photoexcitation with synchrotron radiation.
The polarization of the laser light used to create 1$s^2$2$p$ state was
either 
parallel or perpendicular to that of synchrotron radiation. It is found
that the strength of many of 
these doubly photo-excited resonances show a clear dependence on the laser
polarization.
 The resonance energies, width and q-values of some of these resonances are 
also presented.