| 摘要 |
PROBLEM TO BE SOLVED: To provide an X-ray detector capable of detecting high-energy X rays with sufficient resolution. SOLUTION: In a sealed proportional counter tube, a case 3 in which a window 2 to make X rays 1 incident is formed and which forms a negative electrode houses a core wire which is extended in a direction A parallel to the surface of the window 2 and forms a positive electrode. A terminal 6 to which both ends of the core wire 4 are connected and which is fixed to the case 3 has insulation parts 6a made of ceramic covered with polyfluoroethylene. The insulation parts 6a insulates the case 3 from the core wire 4. Gas mainly comprising xenon is included in the case at a pressure of 500 hPa to 1,200 hPa.
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