Variational Calculation of the Intrashell 2p^(2)^(3)P^(e)States for Heliumlike N^(5+)and O^(6+)Ions

Doubly excited intrashell 2p^(2)^(3)P^(e)tates in heliumlike N^(6+)and O^(6+)ions are calculated by using the original Slater-type wave function and the modified configuration interaction wave function.Using the modified Slater-type wave function having up to 393 and 276 terims for N^(6+)and O^(6+),we predicted the energy positions of thediscrete 2p^(2)^(3)P^(e)states for these two heliumlike ions.They are-11.140748676 a.u.and-14.726670741 a.u.,respectively.Several expectation values ofγ^(n)_(i)andγ^(m)_(12)(-1≤n≤1,and-1≤m≤2)are also given in the presentletter.The present results indicate that the modified Slater-type wave function in which r<and rx coordinatesare incorporated is effective and powerful for the description of the 2p^(2)^(3)P^(e)state showing strong correlationeffect in two-electron systems.