| 摘要 |
<p>: X-ray tube comprising two successive layers of anode material. An anode of an X-ray tube, particularly for X-ray analysis, comprises at least two successive layers (7, 8 or 11, 10 or 13, 12) of anode material. A first layer (7, 11, 12) thereof consists mainly of an element having a comparatively low atomic number, such as scandium or chromium, whilst a further layer (8, 10, 13) consists mainly of an element having a comparatively high atomic number, such as molybdenum, tungsten or uranium. For the selection of a desired radiation spectrum, the tube voltage is either adapted to the radiation and absorption properties of the anode material or can be switched over between several values. Upon the first layer a layer of for example beryllium can additionally be mounted.</p> |
