A&A 409, 771-780 (2003)
Measurement of Stark parameters of HeII P , P and P spectral linesF. Rodríguez, J. A. Aparicio, V. R. González, J. A. del Val and S. Mar
Departamento de Optica y Física Aplicada, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
(Received 24 March 2003 / Accepted 7 July 2003)
This work reports information on the pressure broadened profiles of the HeII P , P and P 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 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.
Key words: atomic data -- line: profiles -- plasmas -- methods: laboratory
Offprint request: Dr. J. A. Aparicio, firstname.lastname@example.org
© ESO 2003