Time-of-flight spectroscopy of ultracold neutrons at the PSI UCN source G. Bison, W. Chen, P. -J. Chiu, M. Daum, C. B. Doorenbos, K. Kirch, V. Kletzl, B. Lauss, D. Pais, I. Rienäcker et al. (2 more) Eur. Phys. J. A, 59 9 (2023) 215 Published online: 19 September 2023 DOI: 10.1140/epja/s10050-023-01104-6