Characterisation of MCP-600D and MCP-700D thermoluminescence detectors and their applicability for photoneutron detection.
Characterisation of MCP-600D and MCP-700D thermoluminescence detectors and their applicability for photoneutron detection.
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MCP-600D 和 MCP-700D 热释光探测器的表征及其在光中子探测中的适用性
DOI：
10.1093/rpd/ncn251
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发表时间：
2008
影响因子：
1
通讯作者：
F Cremers
中科院分区：
文献类型：
--
作者：
E Brunckhorst;X Sheng;M Todorovic;J Becker;F Cremers
本文介绍了两种高灵敏度 LiF:Mg,Cu,P 热释光探测器 (TLD) 的特性，即 MCP-600D 和 MCP-700D [波兰热释光探测器 (TLD)]。此外，还展示了两个探测器用作配对系统用于直线加速器高能光子场中光中子探测的适用性。对于 MCP-600D 和 MCP-700D，批次均匀性分别在 22% 和 14% 以内 (2 SD)。对每个 TLD 的单独响应进行校正分别导致 5% 和 4% 的再现性。两种 TLD 类型均显示出对高达 4 Gy 剂量的线性探测器响应。对于 4 和 6 MV 光子，两者的能量依赖性均在 2% 以内。对于 15 MV 光子束，MCP-600D 显示出更高的响应 (10%)；与MCP-700D (2%) 相比。 MCP-600D 能够检测 15 MV 光子暴露中因光中子而产生的额外剂量；然而，所使用的直线加速器的开放场的信号具有再现性的量级。无论如何，使用一种反照率技术可以检测开放光子场中的光中子。中子检测极限为每 1 Gy 光子剂量 10 µGy 中子剂量。然而，TLD 的再现性需要超过 10 个检测器才能确定不确定度 <5% 的结果。
This paper presents the characteristics of two high-sensitive LiF:Mg,Cu,P thermoluminescence detectors (TLDs) named MCP-600D and MCP-700D [thermoluminescence detector (TLD) Poland]. Furthermore, the applicability of both detectors used as a paired system for photoneutron detection in a high-energy photon field at a linear accelerator is shown. For MCP-600D and MCP-700D, the batch homogeneity is within 22 and 14%, respectively (2 SD). Correction for the individual response of each TLD leads to a reproducibility of 5 and 4%, respectively Both TLD types reveal a linear detector response to dose up to 4 Gy. The energy dependence for both is within 2% for 4 and 6 MV photons. For a 15 MV photon beam, the MCP-600D shows a higher response (10%); compared with the MCP-700D (2%). The MCP-600D is capable of detecting extra doses due to photoneutrons in a 15 MV photon exposure; however, the signal for an open field of the used linear accelerator is in the order of the reproducibility. Using a kind of albedo technique allows detection of photoneutrons in the open photon field anyhow. The neutron detection limit is 10 µGy neutron dose per 1 Gy photon dose. Reproducibility of the TLDs, however, requires more than 10 detectors to determine results with an uncertainty of <5%.