For decades, the irradiation facility for beta radiation, the Beta Secondary Standard BSS 2 developed at PTB, has been in worldwide use to irradiate dosemeters, detectors and other devices with calibrated beta sources. In this work two energy-reduced radiation fields based on the 90 Sr/ 90 Y source are described. Their electron and photon particle spectra are made available as data files. In addition, angular distributions and the depth dose profiles are given. The spectra were determined using the Monte Carlo particle transport code EGSnrc/BEAMnrc and are provided in the supplementary data.

中文翻译：

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BSS 2的90 Sr / 90 Y能量减少的β辐射场

数十年来，用于P射线的辐照设备，即PTB开发的Beta二级标准BSS 2，已在世界范围内用于辐照剂量计，检测器和带有校准β光源的其他设备。在这项工作中，描述了基于90 Sr / 90 Y源的两个降低能量的辐射场。它们的电子和光子粒子光谱可作为数据文件使用。另外，给出了角度分布和深度剂量分布。使用蒙特卡洛粒子传输代码EGSnrc / BEAMnrc确定光谱，并在补充数据中提供。