Institut de Radiophysique, Lausanne, Switzerland.
Institut de Radiophysique, Lausanne, Switzerland.
Appl Radiat Isot. 2022 Dec;190:110507. doi: 10.1016/j.apradiso.2022.110507. Epub 2022 Oct 6.
The half-lives of Sc and Sc were measured by following their decay rate using several measurement systems: two ionization chambers and three γ-spectrometry detectors with digital and/or analogue electronics. For Sc, the result was the combination of seven half-life values giving a result of 4.042(7) h, which agrees with the last reported value of 4.042(3) h and confirms the near to 2% deviation from the recommended half-life of 3.97(4) h. Scandium-44 is present as an impurity in the production of Sc by cyclotron proton irradiation. Its half-life was determined by measurements performed a few days after End of Bomardment (EoB), so that the Sc decayed down to a negligible level. Seven measurements were combined to obtain an average of 58.7(3) h, which is in agreement with the recommended value of 58.6(1) h.
使用多个测量系统（两个电离室和三个带有数字和/或模拟电子设备的γ谱仪探测器）测量了 Sc 和 Sc 的半衰期。对于 Sc，将七个半衰期值组合起来得到 4.042(7) h 的结果，与最后报道的 4.042(3) h 值一致，并证实了与推荐的半衰期 3.97(4) h 的接近 2%的偏差。Scandium-44 作为回旋质子辐照生产 Sc 的杂质存在。在轰击结束后几天（EoB）进行的测量确定了其半衰期，因此 Sc 衰减到可忽略的水平。将七次测量结果组合起来，得到平均半衰期为 58.7(3) h，与推荐值 58.6(1) h 一致。
