Abstract

The coupled equation method (CEM) has been applied to investigating the resonance structures for the ground state 1s2 2s 2S of the neutral lithium from the first threshold up to 64.5 eV. Resonance structures of atomic lithium due to single excitations of the 1s and 2s electrons are studied by infinite-order calculations in detail. The effect of spin-orbit splitting is also included for some of the low-lying 1s 2s np resonance, and the influence of the interference between 1s 2s 3S np and 1s 2s 1S np states on the resonance structure has been confirmed theoretically. The results show that the presented technique can give the reasonable resonance structures very well in photoionization processes.

© 2007 Chinese Optics Letters

Trends in the theory of atomic photoionization

Anthony F. Starace
Appl. Opt. 19(23) 4051-4062 (1980)

Measurement of photoionization cross section in atomic uranium using simultaneous observation of laser-induced photoionization and fluorescence signals

Mukesh Lal Shah, Gomati Prasad Gupta, Vas Dev, Bishwaranjan Dikshit, Manmohan Singh Bhatia, and Brij Mohan Suri
J. Opt. Soc. Am. B 29(4) 600-606 (2012)

Selective photoionization of lithium isotopes in a hollow cathode lamp: a feasibility study for a laser ion source and detector

V. K. Saini, A. Kak, and S. K. Dixit
Appl. Opt. 57(23) 6808-6816 (2018)

Two-photon ionization rates of atomic hydrogen: comparison of numerical and analytical techniques

K. J. LaGattuta
J. Opt. Soc. Am. B 10(5) 958-962 (1993)

Photoionization studies from the 3p P2 excited state of neutral lithium

Shaista Shahzada, Palvasha Ijaz, Mehmood Shah, Sami-Ul- Haq, Mushtaq Ahmed, and Ali Nadeem
J. Opt. Soc. Am. B 29(12) 3386-3392 (2012)