Measurementof Stark parameters of HeII Pα Pβ and Pγ spectral lines

Details Measurementof Stark parameters of HeII Pα Pβ and Pγ spectral lines Measurementof Stark parameters of HeII Pα Pβ and Pγ spectral lines

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...409..771r&link_type=abstract

Astronomy and Astrophysics, v.409, p.771-780 (2003)

Astronomy and Astrophysics

Astrophysics

3

Atomic Data, Line: Profiles, Plasmas, Methods: Laboratory

Scientific paper

This work reports information on the pressure broadened profiles of the HeII P_alpha , P_beta and P_gamma spectral lines measured in a pulsed discharge lamp. Information relative to the line shapes, full width at 1/2, 1/4 and 1/8 of the maximum intensity and the dip of the HeII 320.3 nm is provided. The electron density has been determined by two-wavelength interferometry and from the Stark width of the HeI 501.6 nm. and ranges during the HeII emission from 0.54 to 0.64 x 1023 m-3 in the plasma. Temperature (1.7-2.4 eV) has been simultaneously determined from the Boltzmann-plot of HeI and from local thermodynamic equilibrium (LTE) assumptions. The final results have been compared with most of the previous existing data.

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