Linewidth oscillations in the 5d3/2nd autoionizing series of barium

The first autoionization region of barium was studied using a single-color two-photon excitation scheme. The resonance energies and linewidths of barium 5d 3/2 nd 1 D 0, 2 series members were obtained by fitting each spectral line with a Beutler-Fano profile function. The quantum defects of the seri...

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Bibliographic Details
Published in:European physical journal plus 2013-12, Vol.128 (12), p.151, Article 151
Main Authors: Afrousheh, K., Makdisi, Y., Kokaj, J., Mathew, J., Nair, R., Pichler, G.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Atomic
Autoionization
Barium
Complex Systems
Condensed Matter Physics
Defects
Dye lasers
Excimer lasers
Excimers
Line spectra
Mathematical and Computational Physics
Molecular
Optical and Plasma Physics
Oscillations
Physics
Physics and Astronomy
Quantum numbers
Regular Article
Resonance
Rydberg states
Theoretical
Tunable lasers
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Summary:The first autoionization region of barium was studied using a single-color two-photon excitation scheme. The resonance energies and linewidths of barium 5d 3/2 nd 1 D 0, 2 series members were obtained by fitting each spectral line with a Beutler-Fano profile function. The quantum defects of the series were calculated using the obtained resonance energies. The behavior of the linewidth and quantum defect of the series members for n = 8 to 30 was then studied to find out about different interactions involving this autoionizing series such as inter-series coupling. Atomic Ba vapor was produced in a hot-pipe oven, and a tunable dye laser pumped by an excimer laser was used to excite autoionizing Rydberg states. We observed spectral linewidth oscillations in the range of the main quantum numbers 8 to 24, and explained this phenomenon based on interconfiguration interaction among autoionizing series of Ba .
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/i2013-13151-8