| 摘要 |
A radiation detection apparatus (10A) includes a selecting unit (11, 12) that allows a light having a light emission wavelength and a polarization direction to pass thorough the selecting unit, an optical system (13) that forms an image of the light, a photon detecting unit (14) that observes the image formed by the optical system (13), and detects the photon in whole range of the image, a counting unit (16) that calculates the number of the alpha ray based on a result of counting the photon derived from the light emission of gas excited by the alpha ray, and is possible to sufficiently eliminate background light (noise light) even if background light is strong, and therefore observe weak light emission. |
