A matryoshka neutron spectrometer

Abstract

The invention discloses a matryoshk neutron spectrograph. The neutron spectrograph comprises a neutron radiation detection analysis processing device and a plurality of different-sized modulators; each modulator includes a container cup, a cup cover and water body; the container cup is a right circular cylinder; a handle disc is set at the center of the circular cup cover; connected through holesare set on the handle disc and the circular cup cover; a threaded hole connected with the through hole is set on the side wall of the handle disc; a fastener passes through the threaded hole to have aresisting connection with a hollow cylinder connection rod; the thickness of the wall of the container cup and the thickness of the circular cup cover are both 2 mm; the height of the handle disc is6 mm-15 mm; and, the minimum internal diameter difference between each two adjacent container cups of a plurality of container cups that are ordered from smallest to largest is 2 cm. The neutron spectrograph provided by the invention uses the water body as the modulator, is convenient to use and unlimited, satisfies the measuring capability of the neutron energy spectrum for the purpose of neutrondosimetry, effectively reduces the quantity and the space by pouring the water body in carrying or moving process, and provides a convenient and fast solution for the neutron energy spectrum field measurement.

Description

technical field [0001] The invention belongs to the technical field of neutron spectrometer equipment, and in particular relates to a matryoshka neutron spectrometer. Background technique [0002] With the popularization and rapid development of nuclear energy and nuclear technology in national production, military defense, medicine, agriculture and other fields, nuclear radiation measurement and protection are increasingly being valued by people. Neutrons, as an important source of nuclear radiation, generally exist around nuclear power plants, nuclear facilities, and nuclear weapons; even in the lives of ordinary people, they are always in the radiation field of environmental background neutrons. The neutron radiation effect in the workplace is often described by the dose equivalent around the neutron, which is closely related to the fluence and energy of the neutron; especially the energy, the neutrons with the same fluence and different energy contribute differently to t...

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Problems solved by technology

The multi-sphere neutron spectrometer is mainly composed of a series of solid polyethylene moderator spheres with different diameters and a thermal neutron detector placed in the center of the moderator sphere, each polyethylene moderator sphere is connected with a thermal neutron detector The combination is called a Bonner Sphere. Since the neutron spectrum measurements are all on-site measurements, a series of independent polyethylene solid materials in the multi-sphere neutron spectrometer are used as moderators, with diameters ranging from 3 inches to 15 inches in size, large in size and heavy in weight, it is inconvenient to carry and move; and the spherical structure of each moderator needs to be equipped with a spherical base to stabilize the moderator when placed in the field environment. Therefore, It also adds unnecessary troubles to the carrying and moving of the multi-sphere neutron spectrometer

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