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    • 3. 发明申请
    • ISOTOPIC IMAGING VIA NUCLEAR RESONANCE FLUORESCENE WITH LASER-BASED THOMSON RADIATION
    • 具有基于激光的THOMSON辐射的核共振荧光同位素成像
    • WO2007038527A1
    • 2007-04-05
    • PCT/US2006/037515
    • 2006-09-26
    • THE REGENTS OF THE UNIVERSITY OF CALIFORNIABARTY, Christopher, P.J.HARTEMANN, Frederic, V.MCNABB, Dennis, P.PRUET, Jason, A.
    • BARTY, Christopher, P.J.HARTEMANN, Frederic, V.MCNABB, Dennis, P.PRUET, Jason, A.
    • G01N23/223G01V5/00H05G2/00
    • G01N23/223G01N2223/076
    • The present invention utilizes novel laser-based, high- brightness, high-spatial-resolution, pencil-beam sources of spectrally pure hard x-ray and gamma- ray radiation to induce resonant scattering in specific nuclei, i.e., nuclear resonance fluorescence. By monitoring such fluorescence as a function of beam position, it is possible to image in either two dimensions or three dimensions, the position and concentration of individual isotopes in a specific material configuration. Such methods of the present invention material identification, spatial resolution of material location and ability to locate and identify materials shielded by other materials, such as, for example, behind a lead wall. The foundation of the present invention is the generation of quasimonochromatic high-energy x-ray (100's of keV) and gamma-ray (greater than about 1 MeV) radiation via the collision of intense laser pulses from relativistic electrons. Such a process as utilized herein, i.e., Thomson scattering or inverse-Compton scattering, produces beams having diameters from about 1 micron to about 100 microns of high-energy photons with a bandwidth of ΔE/E of approximately 1OE" 3 .
    • 本发明利用新颖的基于激光,高亮度,高空间分辨率的光谱纯硬X射线和γ射线辐射的铅笔光束来诱导特定核中的共振散射,即核共振荧光。 通过监测作为光束位置的函数的这种荧光,可以在二维或三维中成像特定材料构型中单个同位素的位置和浓度。 本发明的这种方法材料识别,材料位置的空间分辨以及定位和识别由其它材料(例如,铅壁后面)屏蔽的材料的能力。 本发明的基础是通过来自相对论电子的强激光脉冲的碰撞,产生准近红外高能x射线(keV的100)和γ射线(大于约1MeV)辐射。 这种在本文中使用的方法,即汤姆逊散射或反康普顿散射,产生具有约1微米至约100微米直径的约等于10埃“3”的带宽为ΔE/ E的高能光子的光束