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- W2364697332 abstract "In order to determine quickly and conveniently several man-made radionuclides of low-level specific radioactivity in batch of powder samples,the γ spectrometry non-destructive analysis is adopted.Each sample about 1 g in weight was loaded into a custom-made plastic box,forming a small disk of Φ26 mm×3 mm.Sample boxes were measured in the lower position,about 1 cm from the HPGe detector(referred as Position H1).Without the same solid standard source for efficiency calibration,so some planar sources(in same diameter) containing many radionuclides were calibrated by standard 60Co planar source in position H25,25 cm from the detector.Then peak efficiencies for planar sources on H1 were obtained.By increasing distance 1 mm each time around position H1,planar sources were measured.Fitting the efficiency vs.distance curve,the efficiencies for disk source with thickness of 3 mm were calculated.Finally specific activities were evaluated including self-absorption correction.The differences of results between this method and radiochemical analysis are no more than 4% by just comparing two nuclides of some samples." @default.
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- W2364697332 date "2010-01-01" @default.
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- W2364697332 title "Analysis for low specific radioactive samples of gram level powder by γ spectrometer" @default.
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