Submersion of rubidium clusters in helium nanodroplets Arne Schiller, Paul Martini, Elias Emile Jabbour Al Maalouf and Paul Scheier Eur. Phys. J. D, 75 4 (2021) 124 Published online: 12 April 2021 DOI: 10.1140/epjd/s10053-021-00112-9