An Interpretation of Anomalous Intensity Ratios Within the Hydrogen-like La Doublet in Optically Thick Laser-produced Plasmas
Year: 1980
Type: article
Abstract: It is shown that the anomalous intensity ratios of the fine-structure components of MgXIIL. And Al XIII L. observed in optically thick laser-produced plasmas can be explained in terms of the usual radiative and collisional processes provided aIIowance is made for the effect of differential motion on the plasma opacity. The Doppler effect associated with differential expansion causes the red component of the doublet in the peripheral plasma region to overlap the blue component in the central region, leading to preferential absorption of the blue component. Model calculations give intensity ratios in good agreement with experiment, and explain such details of the line profile structure as the so-caIIed short-wave satellite and a component spacing in excess of the theoretical optically thin value. This study further demonstrates the major role played by differential motion in shaping the emergent profile of an opticaIIy thick line from a laser-proouced plasma.
Source: Australian Journal of Physics
DOI: 10.1071/ph800283a
Author: FE Irons
Institution: Australian National University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2054659377