| 摘要 |
Disclosed is an X-ray tube for fluorescence analysis having an exit aperture which is closed by a window of non-uniform thickness. A thicker window portion is located at the side of the aperture remote from the anode and partly overlaps a thinner window plate. In an analysis apparatus, the thicker window portion is located in a portion of the window through which passes the radiation traversing a comparatively small distance between the anode and the specimen. |
