This paper present the current work on neutron detection in Soltan Institute for Nuclear Studies. Lately, we have focused our research on the development of new organic scintillators including liquid scintillators for neutron detection and associated measurements. We measured liquid scintillators (also 10B—doped for thermal neutron detection) 3He tubes, composites, etc. Response of the following detectors on thermal neutrons, fast neutrons and gamma radiation—the pulse shape discrimination (PSD)—has been mainly performed by means of a zero—crossing (ZC) method.