https://doi.org/10.1140/epjd/e2004-00071-9
Investigation of highly excited states of calcium by three-photon ionization
1
Instytut Matematyki, Akademia Bydgoska im. Kazimierza Wielkiego, Chodkiewicza 30, 85-064 Bydgoszcz, Poland
2
Instytut Fizyki, Uniwersytet Mikołaja Kopernika w Toruniu, ul. Grudziądzka 5/7, 87-100 Toruń, Poland
Corresponding author: a dlisak@phys.uni.torun.pl
Received:
9
April
2003
Revised:
29
September
2003
Published online:
18
May
2004
The three-photon ionization in Ca from 
S0 ground state is
studied. The two-photon process is a near — resonance process with one of
the following bound states: 4s4d 1D2, 4p
P2, 4s6s 1S0, 4
D2 and 4
S0 while the
third photon reach either directly the continuum or one of the autoionizing
states. The succession of bound states as well as the transitions above the
ionization limit are discussed. The dynamics of the multiphoton excitation
processes is also discussed and radiative decay of 4
S0 Ca
state with two-photon excitation as well as (the measured) decay times of
the Ca autoionizing states using the proper line profiles for different
quantum numbers has been determined.
PACS: 32.70.-n – Intensities and shapes of atomic spectral lines / 32.70.Cs – Oscillator strengths, lifetimes, transition moments / 32.80.Fb – Photoionization of atoms and ions / 32.80.Rm – Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
