Adsorption of helium on a charged propeller molecule: hexaphenylbenzeneSiegfried Kollotzek, Florent Calvo, Serge Krasnokutski, Fabio Zappa, Paul Scheier and Olof EchtEur. Phys. J. D, 75 11 (2021) 299DOI: https://doi.org/10.1140/epjd/s10053-021-00301-6