中性子ドシメトリーシステムのためのHe原子測定装置較正法

概要

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A helium gas measurement method as the neutron dosimetry has excellent features that the number of helium atoms produced in a dosimeter by neutron irradiation is in proportion to the neutron fluence. The produced helium is stable and is not itself burnt up by neutron irradiation. We have already developed the helium atoms measurement system and the system is adequate to the neutron dosimetry system. One of important points to be considered in achieving the reliable dosimetry by the helium gas measurement method is the absolute calibration of the helium atoms measurement system. The reliable calibration is need for the neutron dosimetry extending over a long period of time. We use two kinds of calibration methods. One is the standard-helium method and the other is the helium-ion-implanted sample method. The exact information on the system calibration will be obtained by comparing the calibration results of these methods. The apparatuses and the manners used in the methods have been reported.
九州大学の論文