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A portable rapid detection device with four isolated single-channels which is used to measure the γ spectra of 40 K,238 U and 232 Th in minerals has developed by the crystal detector group of IMP at present.Each channel in the device is mainly composed of four parts,such as the radiation detector with CsI(TI)crystal,the high quantum efficient PMT,the subsequent electronics and the counter.The specific nuclide will be identified by measuring its corresponding characteristicγray.The window with suitable ULD(Up-
A portable rapid detection device with four isolated single-channels which is used to measure the γ spectra of 40 K, 238 U and 232 Th in minerals has developed by the crystal detector group of IMP at present. Each channel in the device is mainly constituted of four parts, such as the radiation detector with CsI (TI) crystal, the high quantum efficient PMT, the subsequent electronics and the counter. specific nuclide will be identified by measuring its corresponding characteristic gammaray. The window with suitable ULD (Up-