Neutron moderator structure

The utility model belongs to the technical field of particle detectors, and particularly relates to a neutron moderator structure. The device comprises a central annular slowing-down body, two layers of slowing-down supporting materials and three layers of shielding supporting materials which are all of cylindrical structures with the same height, and a central sample injection hole is formed in the center of the central annular slowing-down body; the central annular slowing-down body is mounted in the two-layer slowing-down supporting material, and the outer diameter of a cylinder of the central annular slowing-down body is the same as the inner diameter of a cylinder of the two-layer slowing-down supporting material; the second-layer moderated supporting material is mounted in the third-layer shielding supporting material, and the outer diameter of a cylinder of the second-layer moderated supporting material is the same as the inner diameter of a cylinder of the third-layer shielding supporting material; an