Influence of the ionic electric field on Stark shifts of neutral helium lines in plasmas B. Amieur, M. T. Meftah, K. Chenini, Y. Ben Nana and H. Guerrida EPL, 148 2 (2024) 24002 Published online: 17 October 2024 DOI: 10.1209/0295-5075/ad8215