Radiation source container and method of extending the sealing life of a radiation source capsule accommodated in the radiation source container thereof

摘要

A radiation source container comprising: a radiation source capsule (1); a radiation source holder (4) having an aperture (B) that emits unidirectionally radiation emitted from a radiation port A of the radiation source capsule, that provides screening such that no leakage of radiation takes place except from this aperture, and that fixes this radiation source capsule (1) in a manner that is difficult to attach or detach; a container (7) that accommodates the radiation source holder (4) and that has an irradiation window (C) that transmits radiation emitted from the aperture; an attenuation plate (3) provided between the radiation port of the radiation source capsule and the irradiation window, that attenuates beforehand the amount of radiation emitted; a shutter (6) provided between the attenuation plate (3) and the irradiation window (C) and that screens the radiation emitted from the irradiation window; and a capsule cover whereby, when the recommended use period in respect of the sealing performance of the radiation source capsule (1) has expired, the attenuating plate (3) is removed and the radiation port of the radiation source capsule (1) is resealed with the same material properties and the same thickness as the attenuating plate (3).