Mauring Alexander, Gäfvert Torbjörn, Bandur Aleksandersen Thomas
Norwegian Radiation Protection Authority, P.O. Box 55, 1332 Østerås, Norway.
Norwegian Radiation Protection Authority, P.O. Box 55, 1332 Østerås, Norway.
Appl Radiat Isot. 2014 Dec;94:54-59. doi: 10.1016/j.apradiso.2014.07.004. Epub 2014 Jul 16.
The background spectrum of HPGe detectors is found to vary significantly as function of the radon concentration in the air surrounding it, especially with regard to the count rates of (222)Rn daughter peaks. This effect is shown to potentially have a large impact on measured values of radon daughter activity concentration, as well as detection limits for low-level measurements. As these radionuclides are commonly used for estimating the activity of (226)Ra, care needs to be taken to ensure that background levels are accurately determined.
发现高纯锗探测器的本底谱随其周围空气中氡浓度的变化而显著变化，尤其是在（222）Rn子体峰的计数率方面。结果表明，这种效应可能会对氡子体活度浓度的测量值以及低水平测量的检测限产生重大影响。由于这些放射性核素通常用于估算（226）Ra的活度，因此需要注意确保准确测定本底水平。
