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Title: Static and dynamic polarizability for C{sup 2+} in Rydberg states

This work presents results from a non-perturbative calculation of dynamic polarizability of C III ions in 1s{sup 2}2sns ({sup 1}S{sup e}) Rydberg states. We employ a two-state model for dressed atomic states to investigate the effect of the frequency-dependent polarizability of optically dressed 1s{sup 2}2sns({sup 1}S{sup e}) states (n = 5 − 12) on transitions to nearby states (1s{sup 2}2pns({sup 1}P{sub 1}{sup o})). Our model calculation results indicate that the resonance structure of the polarizabilities is entirely captured by the transition terms whereas the free electron polarizability only provides a smooth background. The resonance structure is evident in the plots and the widths increase with increasing principal quantum number. This work refers to highly excited 1s{sup 2}2sns ({sup 1}S) Rydberg states, embedded in the electric dipole field of the 2s – 2p core transition in Li-like C{sup 3+} ion. The contributions of the individual transitions to the static polarizabilities of these Rydberg states are obtained from the use of the sum-over-state method. To this aim, both the C{sup 2+} ground state and the C{sup 3+} target state energies have been carefully calculated based on the configuration interactions method implemented in the General-purpose Relativistic Atomic Structure Package. Agreement is reasonably goodmore » with existing data wherever available. These results are believed to be the first such values for this system and will be important for ionic spectroscopy and plasma diagnostics.« less
Authors:
 [1]
  1. National Institute for Laser, Plasma and Radiation Physics, Department of Lasers, Atomistilor 409, P.O. Box MG-36, Magurele-Ilfov, 077125 Romania (Romania)
Publication Date:
OSTI Identifier:
22492282
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 7; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CARBON IONS; CONFIGURATION INTERACTION; E STATES; ELECTRIC DIPOLES; ELECTRONS; FREQUENCY DEPENDENCE; GROUND STATES; ION SPECTROSCOPY; PLASMA DIAGNOSTICS; POLARIZABILITY; RELATIVISTIC RANGE; RESONANCE; RYDBERG STATES; S STATES