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公开(公告)号：US5206174A
公开(公告)日：1993-04-27
申请号：US949955
申请日：1992-09-24
申请人： Robert J. Gehrke , Marie H. Putnam , E. Wayne Killian , Richard G. Helmer , Ronnie L. Kynaston , Scott G. Goodwin , Larry O. Johnson
发明人： Robert J. Gehrke , Marie H. Putnam , E. Wayne Killian , Richard G. Helmer , Ronnie L. Kynaston , Scott G. Goodwin , Larry O. Johnson
IPC分类号： G01T1/36
摘要： A spectroscopic method to rapidly measure the presence of plutonium in soils, filters, smears, and glass waste forms by measuring the uranium L-shell x-ray emissions associated with the decay of plutonium. In addition, the technique can simultaneously acquire spectra of samples and automatically analyze them for the amount of americium and .gamma.-ray emitting activation and fission products present. The samples are counted with a large area, thin-window, n-type germanium spectrometer which is equally efficient for the detection of low-energy x-rays (10-2000 keV), as well as high-energy .gamma. rays (>1 MeV). A 8192- or 16,384 channel analyzer is used to acquire the entire photon spectrum at one time. A dual-energy, time-tagged pulser, that is injected into the test input of the preamplifier to monitor the energy scale, and detector resolution. The L x-ray portion of each spectrum is analyzed by a linear-least-squares spectral fitting technique. The .gamma.-ray portion of each spectrum is analyzed by a standard Ge .gamma.-ray analysis program. This method can be applied to any analysis involving x- and .gamma.-ray analysis in one spectrum and is especially useful when interferences in the x-ray region can be identified from the .gamma.-ray analysis and accommodated during the x-ray analysis.
摘要翻译： 通过测量与钚衰变相关的铀L壳x射线辐射，可以快速测量土壤，过滤器，涂片和玻璃废物形式中钚的存在的光谱方法。 此外，该技术可以同时获取样品的光谱，并自动分析其中存在的ium和γ射线发射激活和裂变产物的量。 用大面积，薄窗，n型锗光谱仪对样品进行计数，对于低能X射线（10-2000keV）以及高能γ射线（> 1）的检测同样有效 MeV）。 8192-或16,384通道分析仪用于一次获取整个光子光谱。 一个双能量时间标记的脉冲发生器，被注入到前置放大器的测试输入端以监测能量级和检测器分辨率。 通过线性最小二乘法光谱拟合技术分析每个光谱的L x射线部分。 每个光谱的伽马射线部分通过标准Ge伽马射线分析程序进行分析。 该方法可以应用于涉及一个光谱中的x射线和伽马射线分析的任何分析，并且在x射线区域的干扰可以从γ射线分析中识别出来并且在x射线分析期间被容纳的情况下尤其有用。
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2.发明授权Device and method for accurately measuring concentrations of airborne transuranic isotopes 失效准确测量空气中超铀同位素浓度的装置和方法
公开(公告)号：US5552610A
公开(公告)日：1996-09-03
申请号：US315012
申请日：1994-09-29
申请人： Charles V. McIsaac , E. Wayne Killian , Ervin G. Grafwallner , Ronnie L. Kynaston , Larry O. Johnson , Peter D. Randolph
发明人： Charles V. McIsaac , E. Wayne Killian , Ervin G. Grafwallner , Ronnie L. Kynaston , Larry O. Johnson , Peter D. Randolph
摘要： An alpha continuous air monitor (CAM) with two silicon alpha detectors and three sample collection filters is described. This alpha CAM design provides continuous sampling and also measures the cumulative transuranic (TRU), i.e., plutonium and americium, activity on the filter, and thus provides a more accurate measurement of airborne TRU concentrations than can be accomplished using a single fixed sample collection filter and a single silicon alpha detector.
摘要翻译： 描述了具有两个硅α检测器和三个样品收集过滤器的α连续空气监测器（CAM）。 这种Alpha CAM设计提供连续采样，并且还测量过滤器上的累积超铀（TRU），即钚和ium的活性，从而提供比使用单个固定样品收集过滤器可以实现的空气中TRU浓度更准确的测量 和单个硅α检测器。
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公开(公告)号：US4968889A
公开(公告)日：1990-11-06
申请号：US309435
申请日：1989-02-01
摘要： An improved system for gamma-ray spectroscopy characterized by an interface module that controls the injection of electronic pulses as well as separation logic that enables storage of pulser events in a region of the spectrum of a multichannel analyzer distinct from the region reserved for storage of gamma-ray events. The module accomplishes this by tagging pulser events (high or low) injected into the amplification circuitry, adding an offset to the events so identified at the time the events are at the output of the analog to digital converter, and storing such events in the upper portion of the spectrum stored in the multichannel analyzer. The module can be adapted for use with existing gamma-ray spectroscopy equipment to provide for automatic analyses of radioisotopes.
摘要翻译： 一种用于伽马射线光谱的改进系统，其特征在于控制电子脉冲注入的接口模块以及分离逻辑，其能够将脉冲发生器事件存储在多通道分析器的频谱区域中，与保留用于存储γ的区域不同 射击事件 该模块通过标记注入到放大电路中的脉冲发生器事件（高或低）来实现这一点，对事件在模数转换器的输出处所识别的事件增加偏移量，并将这些事件存储在上位机 存储在多通道分析仪中的频谱的一部分。 该模块可以适用于现有的伽马射线光谱设备，以提供放射性同位素的自动分析。
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