Dipole angular distribution and spin polarization of photoelectrons from semi-filled shell atoms

We calculated photoelectrons' dipole angular anisotropy and spin-polarization parameters for a number of semi-filled shell atoms in the frame of the Spin Polarized Random Phase Approximation with Exchange. We consider photoelectrons from semi-filled and closed shells that are neighbours. We studied also photoelectrons from Cr$^{\ast}$ and Mo$^{\ast}$ that are formed by spin-flip of the outer $s - $electrons. To see the role of the nuclear charge variation, we have treated the case of 3$p$ - electrons in K, Ar and K$^{+}$. The following subshell were considered: N (2$p)$, P (3$p)$, Ar (3$p)$, K$^{+}$(3$p)$, K(3$p)$, Cr(3$p$, 3$d)$, Cr$^{\ast}$(3$d)$, Mn(3$p$, 3$d)$, As(3$d$, 4$p)$, Mo(4$p$, 4$d)$, Mo$^{\ast}$(4$d)$, Tc(4$p$, 4$d$, ), Sb(4$d$, 5$p)$, Eu(4$f)$. The detailed information can be found in [1].The peculiarities of obtained parameters as functions of photon frequency are quite prominent and deserve experimental investigation. \newline [1] M. Ya. Amusia and L. V. Chernysheva, http://arxiv.org/abs/physics/0701040