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dc.contributor.authorMerlitz, H-
dc.contributor.authorGopakumar, G-
dc.contributor.authorChaudhuri, R. K-
dc.contributor.authorDas, B. P-
dc.contributor.authorMahapatra, U. S-
dc.contributor.authorMukherjee, D-
dc.identifier.citationPhysical Review A, Vol. 63, No. 2, pp. 022507en
dc.description.abstractIonization potentials (IP's) are evaluated for various excited states of Tl using the relativistic coupled cluster (CCCD) theory in the even-parity pair channel approximation (CCSD-EPC). An average accuracy below half a percent is reached. The effect of deep core electrons on the core-valence correlations is investigated. It is found that electrons in the third subshell (n=3) modify the IP's of the 6p orbitals by 100 cm-1. By comparison with calculations made in the linearized CCSD (LCCSD) approximation it is demonstrated that nonlinear contributions are mandatory to reach an accuracy below half a percent for the 6p1/2 orbital.en
dc.format.extent45639 bytes-
dc.publisherThe American Physical Societyen
dc.subjectIonization Potentialsen
dc.subjectRelativistic Coupled Clusteren
dc.titleCore effects on ionization potentials in thalliumen
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