Neutron grid, neutron grid stack, neutron grid device, and method of manufacturing neutron grid

A neutron grid, comprising:

• a grid including:
• a plurality of spacers through which at least a part of first neutrons from a target passes;
• and a plurality of absorbers to absorb at least a part of second neutrons scattered thorough the target, the spacers and the absorbers being alternately arranged along a first direction and extending along a second direction intersecting with the first direction;
• and
• a pair of covers through which at least a part of the first neutrons and at least a part of the second neutrons pass, sandwiching the grid along a third direction intersecting with the first and second directions, wherein
• the spacers contain W and at least one selected from the group consisting of Si, Al2O3, AlN, SiC, and Y2O3,
• the absorbers contain Ta, or Ta and at least one selected from the group consisting of B, Gd, Sm, Li, Cd, Gd2O3, and 10B4C,
• the covers contain Al, or Al and at least one selected from the group consisting of W, Pb and Bi, and
• a thermal expansion coefficient difference between one of the spacers and one of the absorbers is ±9×10−6/° C. or less, or Young's modulus of one of the spacers is 100 GPa or more.