The standard method of alkali metal vapor source and emitting induced and alkali metal leak detector

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PROBLEM TO BE SOLVED : To provide a method for inducing the light emission of alkali metal steam, a standard light source and a device for detecting the leakage of the alkali metal where the leakage of the alkali metal can be easily detected in a facility using alkali metal of a molten state by utilizing the light emission induced by a temperature gradient in an atmosphere of a rare gas so that a fire from the leakage of the molten alkali metal can be prevented and can be extinguished quickly, which can be used as a standard light source for the comparison of wavelengths, which is in no danger of malfunctions, which have simple structures and is easy to handle and which have excellent features such as low costs. SOLUTION : The method for inducing the light emission of the alkali metal steam is characterized in that steam V of the alkali metal M is generated by heating it in an atmosphere of the rare gas G and an air stream of the rare gas G is created around the alkali metal steam V to induce the light emission L of it. COPYRIGHT : (C)2004, JPO