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BeOSL dosemeters and new ICRU operational quantities: Response of existing dosemeters and modification options
Radiation Measurements ( IF 2 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.radmeas.2020.106482
H. Hoedlmoser , V. Bandalo , M. Figel

Abstract The energy response for angles of incidence of 0° and 60° of current BeOSL Hp(10)-, Hp(3)-, Hp(0,07)- and H*(10) dosemeters for photon radiation has been expressed in terms of the new operational quantities Hp, Dlens, Dlocal skin, and H* proposed by ICRU. Results show the Hp(3)- and Hp(0,07) dosemeters can be used for Dlens and Dlocal skin with minor modifications to the system calibration. The whole body Hp(10) and area H*(10) dosemeters, however, show a pronounced over response in terms of the new quantities Hp and H* in the energy range below 40 keV. For the whole body dosemeter, we have investigated, by means of Monte Carlo Simulation, how the use of different filter materials with higher Zeff and higher density could improve the response of the single element dosemeter in terms of Hp and identified filters that could achieve an IEC 62387 compliant response down to approximately 20 keV photon energy, assuming current IEC limits. In an alternative approach, a two-element algorithm, making use of the reading of the Hp(0,07) element of the dosemeter has been developed, which delivers a Hp-response fulfilling current IEC limits down to 15 keV, albeit with increased measurement uncertainty.

中文翻译:

BeOSL 剂量计和新的 ICRU 操作量:现有剂量计和修改选项的响应

摘要 当前 BeOSL Hp(10)-、Hp(3)-、Hp(0,07)- 和 H*(10) 剂量计对光子辐射的 0° 和 60° 入射角的能量响应表示为ICRU 提出的新操作量 Hp、Dlens、Dlocal skin 和 H*。结果显示 Hp(3)- 和 Hp(0,07) 剂量计可用于 Dlens 和 Dlocal 皮肤,只需对系统校准稍作修改。然而,全身 Hp(10) 和面积 H*(10) 剂量计在能量范围低于 40 keV 的新量 Hp 和 H* 方面表现出明显的过度响应。对于全身剂量计,我们通过蒙特卡罗模拟研究了,使用具有更高 Zeff 和更高密度的不同过滤器材料如何改善单元素剂量计在 Hp 方面的响应,并确定过滤器可以实现 IEC 62387 兼容响应,低至约 20 keV 光子能量,假设当前的 IEC 限制。在另一种方法中,开发了一种利用剂量计 Hp(0,07) 元件读数的双元件算法,该算法提供的 Hp 响应满足低至 15 keV 的当前 IEC 限制,尽管增加了测量不确定度。
更新日期:2020-12-01
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