Using laser-produced plasmas of high temperature and density the authors have investigated the possible shifts due to local plasma polarisation on the Halpha lines emitted by C VI and N VII. In contradiction with a number of theoretical treatments, they have found no evidence for shifts of the predicted magnitude. Whatever the plasma conditions the Halpha lines have been observed to be unshifted to within +or-0.02 AA corresponding to the estimated accuracy of the measurements. Results are discussed in the light of the existing theoretical treatments and are compared with similar investigations in the isoelectronic sequences.
Polarisation Shift of Low-Z Balmer Lines in Laser-Produced Plasmas
NICOLOSI, PIERGIORGIO;
1981
Abstract
Using laser-produced plasmas of high temperature and density the authors have investigated the possible shifts due to local plasma polarisation on the Halpha lines emitted by C VI and N VII. In contradiction with a number of theoretical treatments, they have found no evidence for shifts of the predicted magnitude. Whatever the plasma conditions the Halpha lines have been observed to be unshifted to within +or-0.02 AA corresponding to the estimated accuracy of the measurements. Results are discussed in the light of the existing theoretical treatments and are compared with similar investigations in the isoelectronic sequences.File in questo prodotto:
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