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MEASUREMENT OF THE RATIO OF ~(99m)Tc AND ~(99)Mo INTENSITY IN ~(99)Mo-~(99m)TC BALANCED SOURCE

Da‐Ke GuCHANG JINYING Southwest Institute of Nuclear Physics and Chemistry

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atomsjournal1986en

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The measurement of the total β intensity of a ~(99)Mo-~(99m)Tc balanced source byextrapolation absorption method of 4πβ-γ coincidence and the measurement ofabsolute intensity of ~(99m)Tc in the balanced source by a S--80 MCA HPGE γspectrometer with the efficiency calibrated by an accurately standardized sourceof ~(99m)Tc are described. The ~(99m)Tc/~(99)Mo intensity ratio is found to be 0.974±0.023. This result is compared with the compilation value. Thus a experimentallymeasured correction factor of ~(99m)Tc is 0.1088±0.0023 for the absolute standar--dization of ~(99)Mo.

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Radioactive Decay and Measurement Techniques Nuclear Physics and Applications Particle accelerators and beam dynamics

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