Identification of Pure Beta Nuclides with Very Near Maximum Energies Using a GM Counter and Thin Absorbers

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A method for identifying ¹⁴C from ³⁵S having very near maximum energies was devised by using a GM counterand thin absorbers.Differentiation was conducted by using attenuation rates of ¹⁴C and ³⁵S in a low energy regionwithout determining their maximum ranges.³⁵S can be discriminated from ¹⁴C by measuring twice.