辐射变色膜片对质子剂量响应的实验标定  

Calibration of dose response of radiochromic film to protons

作　　者：洪伟[1,2] 刘东晓[1,3,2] 滕建[1,2] 焦春晔[1,2] 伍波[1,2] 谷渝秋[1,2] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]中国工程物理研究院等离子体物理国家重点实验室,四川绵阳621900 [3]中国工程物理研究院研究生部,四川绵阳621900

出　　处：《强激光与粒子束》2011年第8期2017-2020,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10775121,10774133);中国工程物理研究院科学技术发展基金项目(2009B0102007)

摘　　要：利用串列静电加速器产生的5～9MeV的质子束对HD-810型辐射变色膜片(RCF)进行了标定。用分光光度计和普通的商用平板扫描仪对辐照后的RCF透过率进行了测量,得到了光学密度变化随RCF灵敏层吸收剂量的变化曲线。标定实验结果表明:在一定的吸收剂量范围内,RCF的光学密度变化与RCF灵敏层中吸收剂量成线性关系,并且与质子能量无关。测量光学密度所用光源的波长对线性范围的大小有较大影响,绿光(532nm)比红光(670nm)有更大的剂量探测范围。The calibration of radiochromic films （HD-810） irradiated by protons with different energies has been carried out on the tandem electrostatic accelerator. The optical densities of the irradiated films were obtained using spectropholometer and commercial flatbed scanner, and the curves of the net optical densities versus dose were acquired. The results of calibration cor roborate that, in a certain range of absorbed dose, the net optical densities vary linearly with absorbed doses of the sensitive laycr and are independent on the energy of protons. The wavelength of light used to measure the optical density has great effect on the linear range, and the linear range of green light （532 nm） is obviously larger than that of red light （670 nm）.

关 键 词：辐射变色膜片 光学密度 吸收剂量 剂量响应 标定 

分 类 号：O536[理学—等离子体物理]