A new approach to investigate diffuse matter in space is proposed. It is based on registration of high energy neutrons. The high energy (hundreds of GeV) neutrons decay length is comparable to distance to the Cuiper belt. The neutrons decay destructs the interstellar background. It is shown that the expected high energy neutrons flux can be registered by the perspective devices (we used data on gas and dust density obtained by an analysis of space apparata trajectories).
Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics (MSU SINP), 1(2), Leninskie gory, GSP-1, Moscow 119991, Russian Federation
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