Unusually long path length for a nearly scatter-free solar particle event observed by Solar Orbiter at 0.43 au - Wimmer-Schweingruber, R.F.; Berger, L.; Kollhoff, A.; Kühl, P.; Heber, B.; Yang, L.; Heidrich-Meisner, V.; Klassen, A.; Gomez-Herrero, R.; Rodriguez-Pacheco, J.; Ho, G.C.; Mason, G.M.; et al. (Astronomy and Astrophysics, 2023)