Scintillation counter; photomultiplier tube alignment专利检索-铅屏蔽防辐射专利检索查询-专利查询网

Scintillation counter; photomultiplier tube alignment

阅读：24发布：2022-04-15

专利汇可以提供Scintillation counter; photomultiplier tube alignment专利检索，专利查询，专利分析的服务。并且A scintillation counter, particularly for counting gamma ray photons, includes a massive lead radiation shield surrounding a sample-receiving zone. The shield is disassembleable into a plurality of segments to allow facile installation and removal of a photomultiplier tube assembly, the segments being so constructed as to prevent straight-line access of external radiation through the shield into the sample receiving zone. Provisions are made for accurately aligning the photomultiplier tube with respect to one or more sample-transmitting bores extending through the shield to the sample receiving zone. A sample elevator, used in transporting samples into the zone, is designed to provide a maximum gamma-receiving aspect to maximize the gamma detecting efficiency.，下面是Scintillation counter; photomultiplier tube alignment专利的具体信息内容。

权利要求

1. In a scintillation counter having a massive lead radiation shield, a sample-receiving zone within said shield, a horizontal photomultiplier tube-housing bore in said shield and extending at least to said sample-receiving zone, at least one photomultiplier tube assembly in said bore responsive to light scintillations produced from radiation emitted by said sample, said photomultiplier tube assembly being rotatable and longitudinally moveable in said bore, and a sample transfer bore extending radially between said receiving zone and an outer side of said shield for permitting the passage of said sample therethrough the improvement whereby said photomultiplier tube assembly is alignable both longitudinally and perpendicularly with respect to said sample trnasfer bore, comprising: a sample conducting tube slidably disposed in said transfer bore with an end thereof extending partially into said samplereceiving zone, said sample conducting tube end having a flat end face, and said photomultiplier tube assembly having a flat longitudinal outer surface adapted for movement adjacent said tube end face upon longitudinal positioning of said photomultiplier tube assembly relative to said horizontal bore, said photomultiplier tube assembly having an outwardly projecting stop portion at an end of said flat surface for engaging said sample conducting tube end to establish an exact longitudinal position of said photomultiplier tube relative to said sample-receiving zone.

2. The scintillation counter of claim 1 including a second sample transfer bore that is coaxial with said first sample transfer bore and extends from an opposite side of said shield to said sample-receiving zone, a second sample conducting tube slidably disposed within said second sample transfer bore with an end thereof partially protruding into said sample-receiving zone, said second sample conducting tube end having a flat end face, and said photomultiplier tube assembly having a second flat outer surface on an opposite side thereof from said first flat surface for movement adjacent said second sample conducting tube end face upon longitudinal positioning of said photomultiplier tube assembly relative to said horizontal bore, said photomultiplier tube assembly having a second outwardly extending stop portion at the end of said second flat surface for engaging said second sample conducting tube to further assist in establishing an exact position of said photomultiplier tube assembly with respect to said sample-receiving zone.

3. The scintillation counter of claim 1 in which said flat photomultiplier tube assembly surface defines a recess in said photomultiplier tube assembly which cooperates with said sample conducting tube end to guide longitudinal positioning of said photomultiplier tube assembly relative to said shield.

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