ALPHA-RAY OBSERVATION DEVICE AND ALPHA-RAY OBSERVATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide an alpha-ray observation device capable of correctly observing alpha-ray even in an environment where the brightness distribution in a measurement range varies.SOLUTION: An alpha-ray observation device 20 includes: a camera 2 for measuring visible light in an observation area 13; a light condensation section 1 for condensing light including light generated by alpha-rays existing in the range of not greater than the angular field 14a of the camera 2; a wavelength selection section 3 for selecting light of a wavelength originating from the alpha-rays from among the light condensed by the light condensation section 1; a two-dimensional optical detector 5 for detecting a distribution of quantity of the light transmitted through the wavelength selection section 3; and a light quantity distribution correction calculation section 6 for correcting data on the light quantity distribution detected by the two-dimensional optical detector 5 with a correction coefficient calculated from brightness information on the visible light measured in advance by the camera 2 and calculating a distribution of quantity of the light of the wavelength originating from the alpha-rays.SELECTED DRAWING: Figure 1