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jin ju li ce liang shi ge(li) tan ce qi de feng xiao lv ke du he fu he xiang jia xiu zheng
Pages: 431-440+453
Year: Issue:  6
Journal: Radiation Protection

Keyword:  Ge(Li)DetectorCalibrationFull-Energy-Peak EfficiencyCoincident Summing CorrectionShort Source-to-Detector Distance;
Abstract: The method for coincident summing correction was discussed in detail and general formulae of coincident were given.Peak efficiencies of a Ge(Li)detector were separately calibrated at distance of 0.95,3.0,11.56,16.75cm from source to surface of the crystal,using γ series reference s-ources of fourteen kinds of nuclides,i.e,~(162)Eu,~(133)Ba,~(75)Se,etc.Calcu-lative and experimental total efficiencies,calculative coincident summingcorrection coefficients,peal effieiencies,least square fitting formulae ofpeak efficiencies and it's goodness at different distances were given.Theuncertainties of peak efficieecies of fitting curve are 0.8—1.6% in the59.6 to 1408 keV energy range(59.6 to 1836 keV when the distance is 3.0m).The uncertainties of experimental peak efficicncies were discussed andlisted.
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