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    • 2. 发明授权
    • Systems and methods for neutron detection using scintillator nano-materials
    • 使用闪烁体纳米材料进行中子检测的系统和方法
    • US09279894B2
    • 2016-03-08
    • US13024066
    • 2011-02-09
    • Sonia Edith LétantTzu-Fang Wang
    • Sonia Edith LétantTzu-Fang Wang
    • G01T3/06B82Y15/00G01T3/08
    • G01T3/06B82Y15/00G01T3/08
    • In one embodiment, a neutron detector includes a three dimensional matrix, having nanocomposite materials and a substantially transparent film material for suspending the nanocomposite materials, a detector coupled to the three dimensional matrix adapted for detecting a change in the nanocomposite materials, and an analyzer coupled to the detector adapted for analyzing the change detected by the detector. In another embodiment, a method for detecting neutrons includes receiving radiation from a source, converting neutrons in the radiation into alpha particles using converter material, converting the alpha particles into photons using quantum dot emitters, detecting the photons, and analyzing the photons to determine neutrons in the radiation.
    • 在一个实施例中,中子探测器包括具有纳米复合材料的三维矩阵和用于悬浮纳米复合材料的基本上透明的薄膜材料,耦合到适于检测纳米复合材料变化的三维矩阵的检测器,以及分析器耦合 到适于分析由检测器检测到的变化的检测器。 在另一个实施例中,用于检测中子的方法包括从源接收辐射,使用转换器材料将辐射中的中子转换为α粒子,使用量子点发射器将α粒子转换成光子,检测光子,并分析光子以确定中子 在辐射。
    • 4. 发明授权
    • Gamma watermarking
    • 伽玛水印
    • US06740875B1
    • 2004-05-25
    • US09502859
    • 2000-02-11
    • Muriel Y. IshikawaLowell L. WoodRonald W. LougheedKenton J. MoodyTzu-Fang Wang
    • Muriel Y. IshikawaLowell L. WoodRonald W. LougheedKenton J. MoodyTzu-Fang Wang
    • G01T1161
    • B41M3/14
    • A covert, gamma-ray “signature” is used as a “watermark” for property identification. This new watermarking technology is based on a unique steganographic or “hidden writing” digital signature, implemented in tiny quantities of gamma-ray-emitting radioisotopic material combinations, generally covertly emplaced on or within an object. This digital signature may be readily recovered at distant future times, by placing a sensitive, high energy-resolution gamma-ray detecting instrument reasonably precisely over the location of the watermark, which location may be known only to the object's owner; however, the signature is concealed from all ordinary detection means because its exceedingly low level of activity is obscured by the natural radiation background (including the gamma radiation naturally emanating from the object itself, from cosmic radiation and material surroundings, from human bodies, etc.). The “watermark” is used in object-tagging for establishing object identity, history or ownership. It thus may serve as an aid to law enforcement officials in identifying stolen property and prosecuting theft thereof. Highly effective, potentially very low cost identification-on demand of items of most all types is thus made possible.
    • 隐蔽的伽马射线“签名”被用作属性识别的“水印”。 这种新的水印技术基于独特的隐写或“隐藏书写”数字签名,其实施在少量的伽马射线发射放射性同位素材料组合中,通常隐蔽地放置在物体上或物体内。 通过将敏感的高能量分辨率γ射线检测仪器合理地精确地放置在水印的位置上,该位置可能仅对物体的所有者可知,该数字签名可以在远距离的未来时间容易地恢复; 然而,由于其极低的活动水平被自然辐射背景遮蔽(包括自然辐射的物体本身,宇宙辐射和物质环境,人体等)的伽马辐射,所有这些标志都被隐藏起来。 )。 “水印”用于建立对象标识,历史或所有权的对象标签。 因此,这可能有助于执法人员查明被盗财产和起诉盗窃。 因此,大多数所有类型的物品的高效,可能非常低成本的识别都是可能的。