Observation of a correlated free four-neutron system

Citation:

Duer M, Aumann T, Gernhäuser R, Panin V, Paschalis S, Rossi DM, Achouri NL, Ahn D, Baba H, Bertulani CA, et al. Observation of a correlated free four-neutron system. Nature. 2022;606:678–682.