Collisional Ionization in Lithium Vapor Excited by Nanosecond Laser Pulses

• Authors: M. Mahmoud , A. El Tabal , M. Nady
• Languages of publication: EN

Abstracts

EN

We report a theoretical study of the collisional ionization processes which occur under 2s → 2p excitation of lithium vapor excited with a nanosecond pulsed laser. The time evolution of the electron energy distribution function and the atomic ion density (Li^{+}) as well as the molecular ion density (Li^{+}_2) at different lithium vapor densities was investigated. The results show a nonlinear behavior of the energy spectra of the electrons created during the interaction of the laser with the lithium vapor. The nonlinear behavior results from superelastic collisions between the free electrons produced by collisional ionization and photoionization with Li(2p). The results also show that a competition exists between the collisional ionization and photoionization processes in producing the atomic ion and the molecular ions.

Keywords

EN

31.15.-p; 32.80.-t; 52.20.Hv

Discipline

• 32.80.-t: Photoionization and excitation
• 31.15.-p: Calculations and mathematical techniques in atomic and molecular physics(see also 02.70.-c Computational techniques, in mathematical methods in physics)
• 52.20.Hv: Atomic, molecular, ion, and heavy-particle collisions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 1
• Pages: 71-77

Dates

published

2012-07

received

2011-08-24

(unknown)

2012-04-04

Contributors

author

M. Mahmoud

• Physics Department, Faculty of Science, Sohag University, 82524-Sohag, Egypt

author

A. El Tabal

• Physics Department, Faculty of Science, Sohag University, 82524-Sohag, Egypt

author

M. Nady

• Physics Department, Faculty of Science, Sohag University, 82524-Sohag, Egypt

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Identifiers

DOI

10.12693/APhysPolA.122.71