A new hybrid next-event estimator for photon-based Monte Carlo dose rate calculations Ettore Guadagni, Cindy Le Loirec, Yannick Pénéliau, Jean Michel Létang, Davide Mancusi and Cheikh Diop Eur. Phys. J. Plus, 136 11 (2021) 1135 Published online: 13 November 2021 DOI: 10.1140/epjp/s13360-021-02120-5