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2008•Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and AtomsRequires access

Specific Activity Measurement of ~(131)I and ~(133)Ba by Anti-coincidence Method

Yao Yan-ling

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Abstract

131I is a very important nuclide applied in nuclear medicine.133Ba,an EC decay nuclide,plays a significant role in the efficiency calibration of HPGe detector.The activity measurement method for the above two kinds of nuclides was studied by the 4πβ(PPC)-γ(HPGe) anti-coincidence counting.The specific activity measurement result for 131I sample is 1 794.8(1±0.6%)kBq·g-1(k=1)and for 133Ba is 502.8(1±0.6%)kBq·g-1(k=1).Compared with the results measured by 4πβ(PC)-γ(NaI(Tl)) coincidence efficiency extrapolation methods at the same reference time,1797.6(1±0.5%)kBq·g-1(k=1)and 504.9(1±0.6%)kBq·g-1(k=1),it is in good agreement within the uncertainties.

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What this paper is about

131I is a very important nuclide applied in nuclear medicine.133Ba,an EC decay nuclide,plays a significant role in the efficiency calibration of HPGe detector.The activity measurement method for the above two kinds of nuclides was studied by the 4πβ(PPC)-γ(HPGe) anti-coincidence counting.The specific activity measurement result for 131I sample is 1 794.8(1±0.6%)kBq·g-1(k=1)and for 133Ba is 502.8(1±0.6%)kBq·g-1(k=1).Compared with the results measured by 4πβ(PC)-γ(NaI(Tl)) coincidence efficiency extrapolation methods at the same reference time,1797.6(1±0.5%)kBq·g-1(k=1)and 504.9(1±0.6%)kBq·g-1(k=1),it is in good agreement within the uncertainties.

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Available abstract

131I is a very important nuclide applied in nuclear medicine.133Ba,an EC decay nuclide,plays a significant role in the efficiency calibration of HPGe detector.The activity measurement method for the above two kinds of nuclides was studied by the 4πβ(PPC)-γ(HPGe) anti-coincidence counting.The specific activity measurement result for 131I sample is 1 794.8(1±0.6%)kBq·g-1(k=1)and for 133Ba is 502.8(1±0.6%)kBq·g-1(k=1).Compared with the results measured by 4πβ(PC)-γ(NaI(Tl)) coincidence efficiency extrapolation methods at the same reference time,1797.6(1±0.5%)kBq·g-1(k=1)and 504.9(1±0.6%)kBq·g-1(k=1),it is in good agreement within the uncertainties.

Key concepts: Nuclide, Coincidence, Coincidence counting, Extrapolation, Calibration, Radiochemistry, Semiconductor detector, Nuclear physics

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