| 摘要 |
<p>The present invention relates to an apparatus for detection of ionizing radiation, wherein the incident radiation ionizes a substance, and the electrons released as a result thereof are accelerated in a dual parallel plate electrode arrangement (17, 19, 21). These electrons will interact with a scintillating substance to emit light, which is detected by a position sensitive light detector (23). Since the light is emitted isotropically in such scintillator measures are taken to achieve a good spatial resolution. Thus, the scintillating substance is either arranged in an array of separately located scintillating elements (27, 72), wherein each scintillating element is separated from the other ones by means of a light impermeable wall (25, 72), or has an extension (T) in the direction of the accelerated electrons shorter than the absorption length of the light photons emitted in the scintillating substance.</p> |
