https://doi.org/10.1140/epjd/e2008-00193-0
Oscillator strengths of the 4s4p 1,3P1 ↦ 4snd1,3D2 transitions of neutral calcium
1
Atomic and Molecular Physics Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad, 45320, Pakistan
2
National Institute of Laser and Optronics (NILOP), P.O. Box Nilore, Islamabad, 45650, Pakistan
Corresponding author: a baig@qau.edu.pk
Received:
18
March
2008
Revised:
20
August
2008
Published online:
15
October
2008
We report measurements of f-values of
the 4s4p 1P1↦4snd 1D2 (
) and the 4s4p 3P1↦4snd 3D2 (
) Rydberg transitions in calcium using a thermionic diode ion
detector in conjunction with a Nd:YAG pumped dye laser system. Absolute
values of the photoionization cross-sections have been determined for
transitions from the 4s4p 1P1 and 4s4p 3P1 excited
states to the 4s ionization threshold as 140(20) Mb and 117(20) Mb
respectively. The measured threshold photoionization cross-sections have
been used to calibrate the f-values of the above-mentioned Rydberg
transitions.
PACS: 32.30.-r – Atomic spectra / 32.70.Cs – Oscillator strengths, lifetimes, transition moments / 32.80.-t – Photoionization and excitation / 32.80.Rm – Multiphoton ionization and excitation to highly excited states
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
