Velocity distribution of neutral particles ejected from biological material under ultra short laser radiation
Biological Physics
2016-11-26 v1 Atomic and Molecular Clusters
Atomic Physics
Tissues and Organs
Abstract
Neutral particles ejected from biological material under ultra short laser ablation have been investigated by laser post-ionization time-of-flight mass spectrometry. It could be shown, that beside ionized species, a substantial amount of neutral particles is ejected. A temporal study of the ablation plume is carried out by recording neutral particle time-of- flight mass spectra as a function of delay time between the ablation and post-ionization pulse. Close the ablation threshold, the mechanism of ejection is found to be of predominantely mechanical nature, driven by the relaxation of the laser-induced pressure. In this regime of stress confinement, the ejection results in very broad velocity distributions and extremely low velocities.
Keywords
Cite
@article{arxiv.1201.4966,
title = {Velocity distribution of neutral particles ejected from biological material under ultra short laser radiation},
author = {Wolfgang Husinsky and Hatem Dachraoui},
journal= {arXiv preprint arXiv:1201.4966},
year = {2016}
}