| 摘要 |
An X-ray image intensifier tube having a target and a number of regularly arranged diodes which, on the side bombarded by the electrons, has a deep diffused phosphorus n+ layer which is covered with a metal buffer layer, comprising a layer of a material having a low atomic number, for example beryllium, and a layer of a material having a comparatively large density, for example, niobium, is preferably present between said layer and the said n+ layer which, under the influence of the incident electrons, mainly emits L.alpha. X-ray radiation which is strongly absorbed in the n+ layer. |
