强激光与粒子束, 2004, 16 (12): 1629, 网络出版: 2006-05-15   

闪光照相条件下相对质量吸收系数的测量

Measurement of relative mass absorption coefficients for flash radiography
作者单位
1 中国工程物理研究院,流体物理研究所,四川,绵阳,621900
2 国防科学技术大学,ATR实验室,湖南,长沙,410073
摘要
介绍了闪光照相中X光传播规律的等效单能模型.针对闪光照相出光重复性差、能谱测量困难的特点提出了相对质量吸收系数的概念.阐述了闪光照相中相对质量吸收系数的测量原理和方法.在闪光照相实验设备上采用整条D~L曲线对钨材料相对质量吸收系数进行了测量,得到的实验结果为1.23,与数值模拟结果1.26符合较好.
Abstract
Principle of flash X-ray radiography was introduced and relative mass absorption coefficient were put forward for flash radiography.Based on mono-energy model,the radiographic image was determined by path-length of object only, so the relative mass absorption coefficient could be measured from the image's optic density versus path-length curve. The relative mass absorption coefficient of tungsten was measured from the images of two triangular prism made of tungsten and Fe respectively,which is 1.23, very close to the simulating result 1.26.
参考文献

[1] 王大椿.X射线质量衰减截面和光电截面的高精度测量[J].原子核物理评论,1997,14(3):148.
Wang D C.Measurement ofmass attenuation and photoelectric cross section of elements with high accuracy in X-ray energy range.Nucl Phys Rev,1997,14(3) :148.

[2] 沿玉华 ,刘志东 ,徐乐英.软X射线质量吸收系数的测定[J].材料研究学报,1999,13(6):621-626.
Shang Y H,Liu Z D,Xu L Y.Determining of mass absorption coefficients for soft X-ray.Chinese Journal of Materials Research ,1999,13(6) :621-626.

[3] McCullough E C,Baker H L,House O W.An evaluation of the quantitative and radiation features of a scanning X-ray transverse axial tomograph:The EMI scanner[J].Radiat Phys,1974,111(3):709-715.

[4] McCullough E C.Photon attenuation in computer tomography[J].Med Phys,1975,2(2) :307-320.

[5] 吴世法.近代成像技术与图像处理[M].北京:国防工业出版社,1997.13-15.
Wu S F.Modernimagingtechniques andimage processing.Beijing:National Defense Industry Press,1997.13-15.

[6] Muller K H.Collimation techniques for dense object flash radiography[A].Proc of SPIE[C].1984,491:130-136.

管永红, 王润生, 施将君, 刘军. 闪光照相条件下相对质量吸收系数的测量[J]. 强激光与粒子束, 2004, 16(12): 1629. GUAN Yong-hong, WANG Run-sheng, SHI Jiang-jun, LIU Jun. Measurement of relative mass absorption coefficients for flash radiography[J]. High Power Laser and Particle Beams, 2004, 16(12): 1629.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!