An EGS4 Monte Carlo examination of the response of a PTW-diamond radiation detector in megavoltage electron beams.
An EGS4 Monte Carlo examination of the response of a PTW-diamond radiation detector in megavoltage electron beams.
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对 PTW 金刚石辐射探测器在兆伏电子束中的响应进行 EGS4 蒙特卡罗检查。
DOI：
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
G. Sandison
中科院分区：
文献类型：
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作者：
P. Mobit;G. Sandison
EGS 4蒙特卡罗程序已被用来调查的PTW/金刚石探测器在临床和单能兆伏电子束照射的能量范围从5到20 MeV的响应。模拟的PTW/金刚石探测器的敏感体积的厚度为0.4 mm，直径为4.4 mm。在水模中模拟不同深度的辐照。结果表明，PTW/金刚石探测器在电子束辐照深度接近dmax时，对电子束有恒定的响应（在1.0%以内），其响应几乎与辐照深度或入射电子能量无关（在3%以内）。对探测器平均剂量的详细检查表明，PTW/金刚石探测器的敏感体积在1%以内充当Spencer-Attix腔。用低Z环氧树脂和聚苯乙烯壁材料封装裸金刚石探测器不影响其在电子束中的响应。未封装的探测器和封装形式的探测器之间的响应差异在所研究的电子能量范围内的所有深度都小于0.5%。
The EGS4 Monte Carlo code has been used to investigate the response of a PTW/diamond detector irradiated in both clinical and monoenergetic megavoltage electron beams ranging in energy from 5 to 20 MeV. The sensitive volume of the PTW/diamond detector simulated has a thickness of 0.4 mm and a diameter of 4.4 mm. Irradiation was simulated at various depths in a water phantom. The results show that the PTW/diamond detector has a constant response (within 1.0%) in electron beams if irradiated at depths closed to dmax, and its response is almost independent of irradiation depth or incident electron energy (within 3%). A detailed examination of the average detector dose shows that the sensitive volume of the PTW/diamond detector acts as a Spencer-Attix cavity within 1%. The encapsulation of the bare diamond detector with low-Z epoxy and polystyrene wall material does not affect its response in electron beams. The difference in response between the unencapsulated (TLD) and the encapsulated form of the detector is less than 0.5% for all depths over electron energy range investigated.
影响因子：
3.8
作者：
ROGERS, DWO;FADDEGON, BA;MACKIE, TR
通讯作者：
MACKIE, TR