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    • 71. 发明授权
    • Self-contained calibrators/irradiators for personal dosimeters
    • 用于个人剂量计的独立校准器/辐照器
    • US5221842A
    • 1993-06-22
    • US775737
    • 1991-10-11
    • J. L. Shepherd
    • J. L. Shepherd
    • G01T1/02G01T1/16
    • G01T1/02G01T1/16
    • A portable self contained calibrator/irradiator for calibrating large numbers of several types of personal dosimetry equipment includes a generally cylindrical housing having relatively heavy exterior lead, lined walls with a heavy cover also lined with lead shielding material. An electrically controlled and powered actuator raises and lowers the cover to provide access to the interior. A centrally located shielding structure provides a guide for a rod carrying one or more sources of nuclear radiation such as 137Cs which are moved vertically along the axis of the shielding structure to a guide permitting 360.degree. radiation of dosimeters arranged in a circular rack on a turntable inside the housing walls. The source rod includes tungsten sheathing above and below the radioactive sources. Interlock switches prevent opening the cover when the source rod is in radiating position. An alternate embodiment includes an attenuator in the form of a thin tungsten sleeve slidable over the radiation source.
    • 用于校准大量几种类型的个人剂量测量设备的便携式自包含校准器/辐照器包括具有相对较重的外部引线的大致圆柱形的壳体,具有也带有铅屏蔽材料的重盖的衬里壁。 电控驱动的致动器升高并降低盖以提供对内部的通路。 位于中心的屏蔽结构为携带一个或多个核辐射源的杆提供引导件,例如沿着屏蔽结构的轴线垂直移动的137Cs,以允许360°辐射放置在旋转台上的圆形齿条中的剂量计 在房屋墙内。 源极棒包括放射源上方和下方的钨鞘。 当源极杆处于辐射位置时,联锁开关可防止打开盖板。 替代实施例包括可在辐射源上滑动的薄钨套管形式的衰减器。
    • 78. 发明授权
    • Direct reading detector/dosimeter for neutrons and other high LET
radiation
    • 用于中子和其他高LET辐射的直读式探测器/剂量计
    • US4613758A
    • 1986-09-23
    • US638308
    • 1984-08-06
    • Harry IngHyman C. Birnboim
    • Harry IngHyman C. Birnboim
    • G01T3/00G01T1/02G01T1/04G01T5/00G01T5/06
    • G01T1/02G01T1/04
    • A direct reading detector/dosimeter for neutrons and other high LET radiation is described, comprising a selected, substantially transparent, elastic solid medium uniformly impregnated with droplets of an immiscible detector liquid. The detector liquid-in-solid is appropriately confined and rendered stable for storage by adding a layer of excess detector liquid and sealing in a container. On opening the container and removing the excess detector liquid, the detector liquid droplets become superheated and the detector/dosimeter is activated. Neutrons and other high LET radiation will trigger the vaporization of the superheated droplets and the selected elastic, solid medium will trap the products of vaporization and retain a visual record thereof over an extended time. The number of vaporization events can be counted to give a measure of the radiation dose.
    • 描述了用于中子和其他高LET辐射的直接读取检测器/剂量计,其包括均匀地浸渍有不混溶检测器液体的液滴的选定的,基本上透明的弹性固体介质。 通过在容器中加入过量的检测液并密封,将液体固体检测器适当地限制并保持稳定。 在打开容器并除去多余的检测器液体时,检测器液滴变得过热并且检测器/剂量计被激活。 中子和其他高LET辐射将触发过热液滴的蒸发,并且所选择的弹性固体介质将捕获蒸发产物并在延长的时间内保持其视觉记录。 可以计算蒸发事件的数量以给出辐射剂量的量度。