Searches of light neutron nuclei

Methods of neutron nuclei production (recharge, many-nucleon transfer, collision nuclei fragmentation, triple fission) are considered. Methods are detecting with attendant particles energy spectra measurement in the binary reactions are considered as well. Also methods of many-neutron direct registration (in the case of nuclear stability) by the flying time or with application of activation analysis are examined. The review of experimental studies on search of stable and quasistationary states of light neutron system were given. A key attention was paid to works carried out on the cyclotron of RSTs 'Kurchatov Institute'