| 摘要 |
<p>A system and method for detecting a substance (114) using x-ray fluorescence is disclosed. The detected substances (114) may be explosives or controlled substances that have a specific chemical fluorescent signature. An energy source (104) transmits an x-ray beam (110) at a target (116, 114). The target (116, 114) may be in a container (112) or under a surface. The beam (110) interacts with the target (116, 114) to produce fluorescent energy. An x-ray detector (122) is at an angle relative to the energy source (104)and gathers the fluorescent energy. The angle differs according to the physical configuration of the system (100). A portable embodiment will have a different angle than a stationary embodiment. A cooling mechanism (124) cools the x-ray detector (122). The fluorescent energy is analyzed and processed by a multichannel analyzer (224) and a computer (250). The computer(250) determines whether the fluorescent energy from the target (116, 114) matches known fluorescent energies of specific substances. If the substance is detected, appropriate indications are made to prevent damage or acceptance of the substance.</p> |
