Spectroscopic investigation of liquid helium excited by a corona discharge: evidence for bubbles and “red satellites”Z.-L. Li, N. Bonifaci, F. Aitken, A. Denat, K. von Haeften, V. M. Atrazhev and V. A. ShakhatovEur. Phys. J. Appl. Phys., 47 2 (2009) 22821DOI: https://doi.org/10.1051/epjap/2009092