Kossert K, Carles A Grau
Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany.
Appl Radiat Isot. 2010 Jul-Aug;68(7-8):1482-8. doi: 10.1016/j.apradiso.2009.11.048. Epub 2009 Dec 1.
The methods to compute the counting efficiency of electron-capture nuclides in liquid scintillation counting have been improved in several previous studies. The main improvements comprise a more realistic treatment of the ejection of photoelectrons and subsequent rearrangement processes in the atomic shell as well as a more detailed atomic rearrangement model. The latter was realized in the MICELLE code by means of a new stochastic approach. This new model was also developed to account for energy deposits within micelles. The recent improvements have now been combined in an updated version of the MICELLE code, which also makes the computation of the counting efficiency of complex decay schemes possible. In this paper, we describe and discuss recent extensions and improvements of the models and further corrections. The calculated counting efficiencies of selected radionuclides are compared with the experimental data obtained by liquid scintillation counting. For the measurements, we use standard solutions, which were calibrated by other methods.
在先前的多项研究中，液体闪烁计数法中计算电子俘获核素计数效率的方法已得到改进。主要改进包括对光电子发射及随后原子壳层中的重排过程进行更实际的处理，以及采用更详细的原子重排模型。后者通过一种新的随机方法在MICELLE代码中得以实现。这个新模型也是为了考虑胶束内的能量沉积而开发的。最近的改进现已整合到MICELLE代码的更新版本中，这也使得计算复杂衰变方案的计数效率成为可能。在本文中，我们描述并讨论了模型的最新扩展和改进以及进一步的修正。将选定放射性核素的计算计数效率与通过液体闪烁计数获得的实验数据进行了比较。对于测量，我们使用通过其他方法校准的标准溶液。
