Eur. Phys. J. D 61, 365-372 (2011)
https://doi.org/10.1140/epjd/e2010-10506-3

Study of the parameters of the He(3 ³S)-He(2 ³P) line ^*

¹ Observatoire de Paris, GEPI, UMR 8111, CNRS, Université Paris VII, 61 Avenue de l'Observatoire, 75014 Paris, France
² Institut d'Astrophysique de Paris, UMR7095, CNRS, Université Paris VI, 98bis Boulevard Arago, Paris, France
³ G2E.lab, Laboratoire de Génie Électrique, UMR 5269, CNRS, Université Joseph Fourier, 25 rue des Martyrs, 38042 Grenoble, France

Corresponding author: ^a nicole.allard@obspm.fr

Received: 14 September 2010
Revised: 13 November 2010
Published online: 14 January 2011

Abstract

We have observed emission spectrum in dense plasmas of helium excited by a corona discharge at 706.69 nm. In continuation of an analysis of spectra obtained in gaseous helium at 300 K, we report on a study of the line parameters of the observed spectra. We discuss the major importance of temperature and perturber density in the broadening, shift and asymmetry measured from calculated profiles within a unified line shape semi-classical theory. The comparison is done with existing data derived from experimental spectra at 300 K. The theoretical work is extended at lower temperatures down to 40 K.