Coincidence mass spectrometry study of double ionization of anthracene by 70 eV electron impact Peter J. M. van der Burgt and Marcin L. Gradziel Eur. Phys. J. D, 76 3 (2022) 60 Published online: 29 March 2022 DOI: 10.1140/epjd/s10053-022-00385-8