Theoretical analysis of the binding of a positron and pair-annihilation in fluorinated benzene molecules Kuniaki Ono, Takayuki Oyamada, Yukiumi Kita and Masanori Tachikawa Eur. Phys. J. D, 74 5 (2020) 89 Published online: 05 May 2020 DOI: 10.1140/epjd/e2020-100538-3