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Standardisation and half-life of Zr-89

机译:标准化和ZR-89的半衰期

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摘要

The nuclide Zr-89 is being tested for the labelling of compounds with long blood circulation times. It decays by beta plus emission (22.8%) and by electron capture (77.2%) to Y-89. Its half-life has been determined by following the decay rate with two measurement systems; an Ionisation Chamber and an HPGe detector. The combination of six results gives a value of T-1/2 = 78.333 (38) h, slightly lower than the DDEP recommended value of 78.42 (13) h. This radionuclide has also been standardised by liquid scintillation counting, 4 pi gamma counting and coincidence techniques.
机译:核素ZR-89正在测试具有长血液循环时间的化合物的标记。 β加发射(22.8%)和电子捕获(77.2%)至Y-89,它衰减。 通过遵循具有两个测量系统的衰减率来确定其半衰期; 电离室和HPGE检测器。 六个结果的组合给出了T-1/2 = 78.333(38)H的值,略低于DDEP推荐值78.42(13)小时。 该放射性核素也通过液体闪烁计数,4piγ计数和符合技术标准化。

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