ISO 6980-1:2006 核能 - 参考β粒子辐射 第1部分：生产工艺
标准编号：ISO 6980-1:2006
中文名称：核能 - 参考β粒子辐射 第1部分：生产工艺
英文名称：Nuclear energy — Reference beta-particle radiation — Part 1: Methods of production
发布日期：2006-08
标准范围
ISO 6980-1:20 06规定了放射性核素源产生的参考β辐射场的要求，这些参考β辐射场用于校准个人和区域剂量计以及剂量率计，用于确定量Hp（0,07）和H’（0,07），以及确定它们作为β粒子能量和入射角的函数的响应。它给出了用于产生参考β辐射场的放射性核素的特性，给出了合适的源结构的例子，并描述了在国际辐射单位和测量委员会（ICRU）范围内测量0.07 mm深度处残余最大β粒子能量和剂量当量率的方法。所涉及的能量范围在66keV和3.6 MeV之间，剂量当量率在约10-5Sv h-1至至少10Sv h-1。此外，对于一些源，给出了作为入射角函数的剂量当量率的变化。ISO 6980-1:20 06提出了两个系列的β参考辐射场，从中可以选择确定仪器的特性（校准和响应的能量和角度依赖性）所需的辐射。系列1参考辐射场由放射性核素源与射束平坦滤光器一起使用产生，射束平坦滤光器旨在在指定距离的大面积上提供均匀的剂量当量率。建议的90Sr+90Y、85Kr、204Tl和147Pm源产生的最大剂量当量率约为200 mSv·h-1。系列2参考辐射场是在不使用光束平坦滤波器的情况下产生的，这允许大面积平面源和一系列源-要使用的到校准平面距离。靠近源，仅产生相对较小的均匀剂量率区域，但该系列具有将能量和剂量率范围扩展到系列1之外的优点。使用的放射性核素是添加了放射性核素14C和106Ru+106Rh的系列1的放射性核素；这些源产生高达10 Sv h-1的剂量当量率。
ISO 6980-1:2006 specifies the requirements for reference beta radiation fields produced by radionuclide sources to be used for the calibration of personal and area dosimeters and dose-rate meters to be used for the determination of the quantities Hp(0,07) and H'(0,07), and for the determination of their response as a function of beta particle energy and angle of incidence. It gives the characteristics of radionuclides that have been used to produce reference beta radiation fields, gives examples of suitable source constructions and describes methods for the measurement of the residual maximum beta particle energy and the dose equivalent rate at a depth of 0,07 mm in the International Commission on Radiation Units and Measurements (ICRU) sphere. The energy range involved lies between 66 keV) and 3,6 MeV and the dose equivalent rates are in the range from about 10-5Sv h-1 to at least 10 Sv h-1. In addition, for some sources variations of the dose equivalent rate as a function of the angle of incidence are given.ISO 6980-1:2006 proposes two series of beta reference radiation fields from which the radiation necessary for determining the characteristics (calibration and energy and angular dependence of response) of an instrument can be selected.Series 1 reference radiation fields are produced by radionuclide sources used with beam flattening filters designed to give uniform dose equivalent rates over a large area at a specified distance. The proposed sources of 90Sr + 90Y, 85Kr, 204Tl and 147Pm produce maximum dose equivalent rates of approximately 200 mSv h-1.Series 2 reference radiation fields are produced without the use of beam-flattening filters, which allows large area planar sources and a range of source-to-calibration plane distances to be used. Close to the sources, only relatively small areas of uniform dose rate are produced but this series has the advantage of extending the energy and dose rate ranges beyond those of series 1. The radionuclides used are those of series 1 with the addition of the radionuclides 14C and 106Ru + 106Rh; these sources produce dose equivalent rates of up to 10 Sv h-1.
标准预览图
