| 摘要 |
<p>PURPOSE:To improve the quantum efficiency of a UV-ray photoelectric surface. CONSTITUTION:A photoelectric surface or a photomultiplier tube is provided with a window material to transmit incidental light, a substrate film including aluminum formed on the window material, and a photo-electron emission film including tellurium and alkali metal formed on the substrate film. Compared to a constitution using Cr for the substrate film, or compared to a constitution using Au or Ag for the substrate film, a favorable quantum efficiency can be realized in a UV-ray zone. As above alkali metal, Cs, Rb, or K-Cs can be used, and a similar result can be achieved in either case.</p> |
