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1. 发明公开

EP0473015A3 Apparatus having reduced background for measuring radiation activity in aerosol particles 失效
标题翻译：具有降低背景的装置，用于测量气溶胶颗粒中的辐射活性
公开(公告)号：EP0473015A3
公开(公告)日：1993-01-27
申请号：EP91113677.8
申请日：1991-08-14
申请人： U.S. Department of Energy , THE TEXAS A & M UNIVERSITY SYSTEM
发明人： Rodgers, John C. , McFarland, Andrew R. , Ortiz, Carlos A. , Marlow, William H.
IPC分类号： G01T1/178
CPC分类号： G01T7/04 , G01T1/178 , Y10S250/02
摘要： Apparatus having reduced background for measuring radiation activity in aerosol particles. A continuous air monitoring sampler is described for use in detecting the presence of alpha-emitting aerosol particles. An inlet fractionating screen has been demonstrated to remove about 95% of freshly-formed radon progeny from the aerosol sample, and approximately 33% of partially-aged progeny. Addition of an electrical condenser and a modified dichotomous virtual impactor are expected to produce considerable improvement in these numbers, the goal being to enrich the transuranic (TRU) fraction of the aerosols. This offers the possibility of improving the signal-to-noise ratio for the detected alpha-particle energy spectrum in the region of interest for detecting TRU materials associated with aerosols, thereby enhancing the performance of background-compensation algorithms for improving the quality of alarm signals intended to warn personnel of potentially harmful quantities of TRU materials in the ambient air.

2. 发明公开

EP0473015A2 Apparatus having reduced background for measuring radiation activity in aerosol particles 失效
标题翻译： Strahlungsaktivitätsmessvorrichtungmit reduzierterStörstrahlungin Aerosolteilchen。
公开(公告)号：EP0473015A2
公开(公告)日：1992-03-04
申请号：EP91113677.8
申请日：1991-08-14
申请人： U.S. Department of Energy , THE TEXAS A & M UNIVERSITY SYSTEM
发明人： Rodgers, John C. , McFarland, Andrew R. , Ortiz, Carlos A. , Marlow, William H.
IPC分类号： G01T1/178
CPC分类号： G01T7/04 , G01T1/178 , Y10S250/02
摘要： Apparatus having reduced background for measuring radiation activity in aerosol particles. A continuous air monitoring sampler is described for use in detecting the presence of alpha-emitting aerosol particles. An inlet fractionating screen has been demonstrated to remove about 95% of freshly-formed radon progeny from the aerosol sample, and approximately 33% of partially-aged progeny. Addition of an electrical condenser and a modified dichotomous virtual impactor are expected to produce considerable improvement in these numbers, the goal being to enrich the transuranic (TRU) fraction of the aerosols. This offers the possibility of improving the signal-to-noise ratio for the detected alpha-particle energy spectrum in the region of interest for detecting TRU materials associated with aerosols, thereby enhancing the performance of background-compensation algorithms for improving the quality of alarm signals intended to warn personnel of potentially harmful quantities of TRU materials in the ambient air.
摘要翻译：具有降低气溶胶颗粒辐射活性背景的装置。描述了连续空气监测取样器用于检测发射的气溶胶颗粒的存在。已经证明入口分级筛选从气溶胶样品中除去约95％的新鲜形成的氡后代，以及约33％的部分衰老的后代。预计增加电冷凝器和改进的二分虚拟冲击器可以在这些数量上产生相当大的改进，目的是丰富气溶胶的超铀（TRU）级分。这提供了改进感兴趣区域中检测到的α粒子能谱的信噪比的可能性，用于检测与气溶胶相关的TRU材料，从而提高用于提高报警信号质量的背景补偿算法的性能旨在警告人员在环境空气中潜在的有害数量的TRU材料。

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