Gilvin P J, Perks C A
Health Protection Agency, Chilton, Didcot, Oxon OX11 0RQ, UK.
Radiat Prot Dosimetry. 2011 Mar;144(1-4):102-6. doi: 10.1093/rpd/ncq299. Epub 2010 Oct 19.
Recent years have seen the increasing use of passive dosemeters that have high sensitivities and, in laboratory conditions, detection limits of <10 µSv. However, in real operational use the detection limits will be markedly higher, because a large fraction of the accrued dose will be due to natural background, and this must be subtracted in order to obtain the desired occupational dose. No matter how well known the natural background is, the measurement uncertainty on doses of a few tens of microsieverts will be large. Individual monitoring services need to recognise this and manage the expectations of their clients by providing sufficient information.
近年来，高灵敏度的被动剂量计的使用越来越多，在实验室条件下，其检测限<10微希沃特。然而，在实际操作中，检测限会明显更高，因为累积剂量的很大一部分将来自自然本底，为了获得所需的职业剂量，必须减去这部分剂量。无论自然本底有多清楚，几十微希沃特剂量的测量不确定度都会很大。个体监测服务机构需要认识到这一点，并通过提供充分的信息来管理客户的期望。
