https://doi.org/10.1140/epjd/e2002-00137-8
Two-color three-photon resonant excitation spectrum of strontium in the autoionization region
1
Atomic and Molecular Physics Laboratory, Department of Physics,
Quaid-i-Azam University, Islamabad 45320, Pakistan
2
Applied Physics Division, PINSTECH, P.O. Box Nilore, Islamabad, Pakistan
Corresponding author: a baig@qau.edu.pk
Received:
21
November
2001
Revised:
2
May
2002
Published online:
19
July
2002
We report new studies of the odd parity autoionizing Rydberg series of
strontium attached to the 4d(
) ionic limits possessing J = 1–3
based on the two-color three photon resonant excitation technique in
conjunction with an atomic beam apparatus. Using the 
intermediate levels, we have been able to record the autoionizing
Rydberg series of J = 1 whereas, from the 
intermediate level the
series of Rydberg levels possessing J = 1, 2 and 3 have been observed.
The level assignments and the line shapes simulations of the autoionizing
resonances have been made using the multichannel quantum defect
theory.
PACS: 32.30.Jc – Visible and ultraviolet spectra / 32.80.Rm – Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
