环境辐射性测量.空气:氡-222.第7部分:评估表面蒸发率用累积法

[中文适用范围]： ISO 11665 的这一部分提供了在给定地点、介质（土壤、岩石、铺设的建筑材料、墙壁等）界面上短时间内（几个小时）估算氡 222 表面呼出率的指南。 ）和气氛。 该估计基于测量从所研究的表面发出并在已知持续时间内累积在已知体积的容器中的氡活度浓度。 该方法仅是估计性的，因为很难量化许多参数对环境条件的影响。 然而，ISO 11665 的这一部分特别适用于调查、寻找来源或对同一地点的呼气率进行比较研究。 ISO 11665 的这一部分不涵盖速率估计设备的校准条件。 所述测量方法适用于氡气呼出率大于5 mBq/m2/s。 注：与通过应用 ISO 11665 本部分获得的结果估计相关的不确定性不能保证真实的通量值包含在不确定性域中。 [外文原描述]： ISO 11665-7:2012 gives guidelines for estimating the radon-222 surface exhalation rate over a short period (a few hours), at a given place, at the interface of the medium (soil, rock, laid building material, walls, etc.) and the atmosphere. This estimation is based on measuring the radon activity concentration emanating from the surface under investigation and accumulated in a container of a known volume for a known duration. This method is estimative only, as it is difficult to quantify the influence of many parameters in environmental conditions. ISO 11665-7:2012 is particularly applicable, however, in case of an investigation, a search for sources or a comparative study of exhalation rates at the same site. ISO 11665-7:2012 does not cover calibration conditions for the rate estimation devices.