SAMURAI International Collaboration Workshop 2017

Short report about the SAMURAI 19 experiment

We have measured (p,2p) reaction on 8He this July with SAMURAI spectrometer to study multi-neutron systems 7H and 4n. Vertex-tracking MINOS target, NeuLAND+NEBULA neutron detector array, and large-coverage recoil proton calorimeter are also used in the current measurement.

The tetraneutron has attracted a lot of experimental and theoretical attention in recent years. The observation of a 4-neutron ground state resonance could deliver information about a three nucleons interaction and may contribute to further understanding of the equation of state in neutron stars. The 4n ground state resonance is created by using the 8He(p,p alpha)4n knock-out reaction. Three...

I will report on the parasitic test experiment of the HIME detector performed at SAMURAI in Nov.-Dec., 2016. HIME (HIgh resolution detector array for Multi neutron Events) is a new-type high resolution neutron detector designed to detect multi neutrons at 100-300 MeV in coincidence with high resolution. High granularity of HIME enables us to track the recoil protons to distinguish the multi...