dc.contributor.author |
Chaudhuri, R. K |
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dc.contributor.author |
Panda, P. K |
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dc.contributor.author |
Das, B. P |
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dc.contributor.author |
Mahapatra, U. S |
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dc.contributor.author |
Mukherjee, D |
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dc.date.accessioned |
2008-08-12T09:13:12Z |
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dc.date.available |
2008-08-12T09:13:12Z |
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dc.date.issued |
1999-07 |
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dc.identifier.citation |
Physical Review A, Vol. 60, No.1, pp. 246 - 252 |
en |
dc.identifier.uri |
http://hdl.handle.net/2248/3083 |
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dc.description.abstract |
We have developed and applied the relativistic coupled-cluster-based linear response theory (RCCLRT) for computing the principal as well as the shake-up ionization potentials (IP's) of Li, Be, Na, and Mg where the single-particle orbitals are generated by solving the relativistic Hartree-Fock-Roothaan equations using the Gaussian basis functions on a grid. The computed principal and shake-up ionization energies by the RCCLRT approach are in favorable agreement with the experimental results. Since for the (one-valence) IP problem, there is a formal equivalence between the principal IP values as obtained from the CCLRT and those obtained as eigenvalues of the multireference coupled-cluster theory, the computed quantities are fully size extensive. The approach via the RCCLRT has the additional advantage of providing the shake-up IP's as well. These are, however, not fully size extensive, but the error scales as the number of valence excitations (2h-1p), so the inextensivity error is rather small. |
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dc.format.extent |
136999 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en |
en |
dc.publisher |
The American Physical Society |
en |
dc.relation.uri |
http://link.aps.org/abstract/PRA/v60/p246 |
en |
dc.subject |
Potentials of alkali-metal |
en |
dc.subject |
Alkaline-earth-metal atoms |
en |
dc.title |
Relativistic coupled-cluster-based linear response theory for ionization potentials of alkali-metal and alkaline-earth-metal atoms |
en |
dc.type |
Article |
en |