A theoretical model for tenuous plasmas C. W. Dye-lasers produced in alkali vapours. Comparison with experimental results
Year: 1981
Authors: Giammanco F., Gozzini S.
Autors Affiliation: Istituto di Fisica dell\’Università, Pisa, Italy; Istituto di Fisica Atomica e Molecolare del C.N.R., Pisa, Italy
Abstract: A theoretical model is proposed to explain the plasma production occurring in alkali vapours irradiated by c.w. dye-lasers tuned to the resonance transition. The nX levels, with energy nearly twice that of the excitation, are populated by the energy pooling collision between two laser-excited atoms and hence are ionized by the process of photoionization and collision with a third excited atom. The electron density is further enhanced by electronic-impact ionization from the nX levels until the stationary state of the plasma is achieved. The theoretical fluorescence behaviour of some test levels as a function of the characteristic parameters (laser power, temperature) is compared with the experimental results obtained in potassium vapours.
Journal/Review: IL NUOVO CIMENTO B
Volume: 66 (1) Pages from: 47 to: 74
KeyWords: Alkali vapours; Dye-Lasers; Potassium vapours DOI: 10.1007/BF02725481