EXPERIMENT OF UNIQUE COMBINATION NUMBER DUE TO THE THIRD-ORDER NEUTRON-CORRELATIONTomohiro Endo, Sho Imai, Kenichi Watanabe, Akio Yamamoto, Atsushi Sakon, Kengo Hashimoto, Masao Yamanaka and Cheol Ho PyeonEPJ Web Conf., 247 (2021) 09004DOI: https://doi.org/10.1051/epjconf/202124709004