公开(公告)号：US5539788A

公开(公告)日：1996-07-23

申请号：US958215

申请日：1992-10-08

申请人： Frank H. Ruddy ,  Thomas V. Congedo ,  David C. Grant ,  Edward J. Lahoda ,  Joseph L. Gonzalez ,  John G. Seidel ,  John Bartko ,  David F. McLaughlin

发明人： Frank H. Ruddy ,  Thomas V. Congedo ,  David C. Grant ,  Edward J. Lahoda ,  Joseph L. Gonzalez ,  John G. Seidel ,  John Bartko ,  David F. McLaughlin

IPC分类号： G01N23/222 ,  G01V5/02 ,  G21G1/06

CPC分类号： G01V5/02 ,  G01N23/222 ,  G01N2223/0745 ,  G01N2223/204 ,  G01N2223/601

摘要： A system for determining depth profiles of concentrations of hazardous elements in soils comprises a neutron source for generating neutrons of a first energy level and irradiating a volume of soil with the neutrons. Nuclear reactions are effected within the soil and gamma radiation is emitted from the soil. The system also includes an array of gamma detectors for detecting gamma radiation emitted from the soil; source electronics for controlling the width of regularly repeated pulses of neutrons generated by the neutron source; detector electronics associated with the gamma detectors for amplifying and digitalizing signals generated by the gamma detectors and storing data representing the digitalized signals; spectral analysis software for analyzing the data and determining the concentrations of selected target elements in the soil; and an acquisition interface module (AIM). The AIM controls the timing of the source and detector electronics such that the neutron source generates neutrons in regularly repeated bursts of a prescribed pulse width and the detectors and detector electronics detect gamma rays during a plurality of time intervals associated with the burst and acquire groups of data. Each group is indicative of a number of gamma rays emitted and their energy levels during a corresponding time interval. The system also includes a mobile platform carrying the neutron source, array of gamma ray detectors and software for determining a depth profile of a target element. Trace elements can also be detected with the disclosed system.

摘要翻译： 用于确定土壤中有害元素浓度深度分布的系统包括用于产生第一能级中子并用中子照射一定体积土壤的中子源。 核反应在土壤中进行，γ辐射从土壤中排出。 该系统还包括用于检测从土壤发射的γ辐射的伽马检测器阵列; 源电子器件，用于控制由中子源产生的规则重复的中子脉冲的宽度; 与γ检测器相关联的检测器电子器件，用于放大和数字化由伽马检测器产生的信号并存储表示数字化信号的数据; 光谱分析软件，用于分析数据并确定土壤中选定的目标元素的浓度; 和采集接口模块（AIM）。 AIM控制源和检测器电子设备的定时，使得中子源以规定的脉冲宽度的规则重复脉冲串产生中子，并且检测器和检测器电子装置在与突发相关联的多个时间间隔内检测伽马射线，并获取 数据。 每个组指示在相应的时间间隔期间发射的伽马射线数量及其能量水平。 该系统还包括携带中子源，伽马射线探测器阵列和用于确定目标元件的深度分布的软件的移动平台。 也可以利用所公开的系统检测微量元素。

公开(公告)号：US4179614A

公开(公告)日：1979-12-18

申请号：US874976

申请日：1978-02-03

申请人： Patrick E. Felice ,  Joseph L. Gonzalez ,  John G. Seidel

发明人： Patrick E. Felice ,  Joseph L. Gonzalez ,  John G. Seidel

IPC分类号： G01T1/11 ,  G01V5/02 ,  G01V5/00 ,  H05B33/00

CPC分类号： G01T1/11 ,  G01V5/02 ,  Y10S250/02

摘要： An improved thermoluminescent dosimeter system and apparatus for sensing alpha particle emission. A thermoluminescent body is sealed between a pair of metallized plastic films. The dosimeter is mounted within a protective inverted cup or a tube closed at one end, which is disposed in a test hole for exposure to radioactive radon gas which is indicative of uranium deposits.

摘要翻译： 用于感测α粒子发射的改进的热发光剂量计系统和装置。 在一对金属化塑料膜之间密封热发光体。 剂量计安装在保护性倒杯或一端封闭的管中，该管被设置在用于暴露于指示铀沉积物的放射性氡气的测试孔中。

公开(公告)号：US5412206A

公开(公告)日：1995-05-02

申请号：US199362

申请日：1994-02-18

申请人： John G. Seidel ,  Frank H. Ruddy ,  Joseph L. Gonzalez ,  Thomas V. Congedo

发明人： John G. Seidel ,  Frank H. Ruddy ,  Joseph L. Gonzalez ,  Thomas V. Congedo

IPC分类号： G01B15/00 ,  G01N23/222 ,  G01T1/169 ,  G01V5/02 ,  G01V5/00

CPC分类号： G01T1/169 ,  G01V5/02

摘要： A method for determining the depth of a gamma emitting element beneath the surface of a volume of soil is disclosed. The disclosed method includes the steps of detecting gamma rays at a first height h.sub.1 above the surface; detecting gamma rays at a second height h.sub.2 above the surface; determining a ratio R representative of the ratio of the number of gamma rays detected at h.sub.2 to the number of gamma rays detected at h.sub.1, or vice versa; and inferring, on the basis of the ratio R, an estimate of the depth of the gamma emitting element beneath the surface.

摘要翻译： 公开了一种用于确定在一定体积的土壤表面下的伽马发射元件的深度的方法。 所公开的方法包括以下步骤：在表面上方的第一高度h1处检测伽马射线; 在表面上方的第二高度h2处检测伽马射线; 确定代表在h2处检测到的伽马射线数与在h1处检测到的伽马射线数之比的比率R，反之亦然; 并且基于比率R推测出表面下方的伽马发射元件的深度的估计。