Absorbed Dose Measurement and LET Determination with TLDs in Space
Absorbed Dose Measurement and LET Determination with TLDs in Space
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空间中 TLD 的吸收剂量测量和 LET 测定
DOI：
10.1093/oxfordjournals.rpd.a031703
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Y. Akatov
中科院分区：
文献类型：
--
作者：
N. Vana;W. Schöner;M. Fugger;Y. Akatov
为了确定复杂混合辐射场中的平均LET，提出了一种利用热释光发光曲线（HTR）峰高比随LET变化的新方法。各种类型的标准和实验室制作的TLD在α，β，γ和中子场和重带电粒子束中进行了校准。这些校准的TL磷光体用于空间站和平号上，以确定等效剂量。在1991年夏季为期5个月的长期使命中，剂量率为0.24 ± 0.01 mGy·d-1，平均LET（组织）为6.2 ± 0.25 keV·μm-1;在1991年10月为期8天的短期使命中，剂量率为0.204 ± 0.003 mGy·d-1，平均LET为6.5 ± 0.30 keV·μm-1。新方法还用于对光子-8号卫星（1992年）和BION-10号卫星（1993年）进行的测量，以获得更多关于空间辐射平均LET随屏蔽变化而变化的信息。当吸收体厚度从1.14mg·cm-2增加到2.5g·cm-2时，平均LET从0.35增加到10 keV·μL-1。该方法还用于确定BION-10上空间辐射的低能电子部分的特性，并用于确定高空飞行器上的平均LET。
For determination of the average LET in complex mixed radiation fields, a new method was developed using the LET dependent changes of the peak height ratios in thermoluminescence glow curves (HTR). Various types of standard and laboratory made TLDs were calibrated in alpha, beta, gamma and neutron fields and in heavy charged particle beams. These calibrated TL phosphors were used on space station MIR in order to determine the equivalent dose. During the long-term mission of 5 months in the summer of 1991 the dose rate was 0.24 ± 0.01 mGy.d -1 with an average LET (tissue) of 6.2 ± 0.25 keV.μm -1 , and during an 8 day short-term mission in October 1991 0.204 ± 0.003 mGy.d -1 with a LET of 6.5 ± 0.30keV.μm -1 . The new method was also used for measurements carried out on satellite PHOTON-8 (1992) and on satellite BION-10 (1993) to obtain more information about the changes of the average LET of space radiation with the variation of the shielding. An increase in the average LET from 0.35 to 10keV.μL -1 dependent on the absorber thickness from 1,14mg.cm -2 to 2.5 g.cm -2 was measured. The method was also used for determination of the characteristics of the low energy electron component of space radiation on BION-10 and for the determination of the average LET on board high altitude aircraft.