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We investigate the total effect of correlations on photoionization of atomicshells with nonzero orbital momentum, in the nonrelativistic high energyasymptotic limit, considering the exclusive case of the dominant final state ofan initial neutral atom. We find that the substantial cancellation of thedominant intra-shell carrelations, which had been reported earlier, can beunderstood utilizing the closure properties satisfied by the eigen functions ofthe nonrelativistic Hamiltonian. Considering the sum of correlations with allstates, occupied or not, we show that complete sum is equal to the contributionof the high energy part of the continuum. Consequently there is a totalcancellation between the contributions of the bound states and the low energypart of the continuum states. This means that the real correlations in thephysical atom can be obtained as the negative of the total contribution of lowenergy states and continuum unoccupied states. We calculate this in frameworkof the quantum defect number. The approach allows us to see that the dominantintrashell correlation is going to be cancelled. We can also obtain some limitson the correlation effects by considering calculations with the screenedCoulomb functions. The role of correlations in the exclusive photoionizationprocesses is discussed.

Particle cancellation of correlations in nonrelativistic high energy asymptotics of photoeffect