| Autor: |
Wei, Yuting, Lan, Changlin, Feng, Li, Xu, Chao, Yang, Xianlin, Li, Xiaojun, Wang, Jiahao, Ge, Yujie, Lou, Benchao, Jiang, Li |
| Zdroj: |
Radiation Detection Technology and Methods; 20220101, Issue: Preprints p1-6, 6p |
| Abstrakt: |
Purpose: Due to the few reports on the 91Sr half-life previously, the accuracy and uncertainty of the results are difficult to meet the requirements such as calculating the cross section and the fission yields of 235U, 238U, and 239Pu. To solve the discrepancy of 91Sr half-life in existing experimental data, the half-life of 91Sr was measured in this work, and the uncertainty was discussed in detail. Method: The measurements were performed by the activation method implemented for the uranium sample using the K-400 neutron generator at the Chinese Academy of Engineering Physics (CAEP). The half-life of 91Sr was measured by γ-ray spectrometry using the high-resolution High Purity Germanium (HPGe) Detector. Results: Through exponential function fitting and a detailed discussion of the uncertainty evaluation, the half-life of 91Sr in the present work was determined to be 9.65 ± 0.30 h, which was consistent with the values reported previously and the uncertainty was reduced greatly, however, the uncertainty assessment of the latter was barely documented. Conclusions: In this work, a more accurate measurement of the 91Sr half-life is provided, as well as the uncertainty is discussed in detail. This result will provide essential information for applications using an activation method, such as the calculation of fission yields of 235U, 238U, and 239Pu. |
| Databáze: |
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