Abstract: A nondestructive inspection system 1 is provided with: a neutron radiation unit 10 capable of radiating a first neutron dose of neutrons; a neutron detection unit 20 capable of detecting a second neutron dose of neutrons scattered inside an inspection object A upon radiation of neutrons from the neutron radiation unit 10; a gamma ray detection unit 30 capable of detecting a gamma ray dose released from the inspection object A upon radiation of neutrons from the neutron radiation unit 10; and an analysis unit 50 that calculates the contained amount of a predetermined substance on the basis of the gamma ray dose and corrects the contained amount of the predetermined substance on the basis of the first neutron dose and the second neutron dose.

Abstract: A nondestructive inspecting device 1 is provided with: a neutron beam emitting unit 10 capable of emitting a neutron beam in a prescribed emission direction D1; a gamma ray detecting unit 20 capable of detecting a gamma ray incident from a prescribed detection direction D2 intersecting the emission direction D1; a device housing 30 which covers the neutron beam emitting unit 10 and the gamma ray detecting unit 20, and in which an opening portion 30a is formed in the emission direction D1 and the detection direction D2; an outer shutter 31 for opening and closing the opening portion 30a of the device housing 30; an external dose monitor 41 for detecting a radiation dose inside the device housing 30; an internal dose monitor 42 for detecting a radiation dose outside the device housing 30; and a control unit 40 for prohibiting opening of the outer shutter 31 if the radiation dose detected by at least either of the dose monitors 41, 42 exceeds a predetermined threshold.

Abstract: To provide an inexpensive gas dispersion plate having a high corrosion resistance to halogen-based corrosive gasses and a plasma thereof, and capable of preventing particle generation from the gas hole, thereby contributing to an improvement in the production yield of the semiconductor devices. The gas dispersion plate includes one or plural gas holes in a base material formed by a Y2O3 ceramic material having a relative density of 96% or more, in which an edge part of the gas hole is formed by a sand blasting process into a rounded shape with a radius of curvature of 0.2 mm or more.

Abstract: In producing formylimidazoles by catalytically oxidizing the corresponding 4- or 5-hydroxymethylimidazoles, the catalytic oxidation is carried out in the presence of a noble metal catalyst while oxygen or air is blown into the reaction system. In this case, it is particularly desirable that the catalytic oxidation in the presence of a noble metal catalyst be carried out in a solvent comprising an aqueous alkali or in a mixed solvent composed of an aqueous alkali and an organic solvent immiscible with water.