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

Journal Article · Wed Jul 15 04:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4928042· OSTI ID:22492282

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 good 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.

• OSTI ID: 22492282
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 7 Vol. 5; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

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