Resonant scattering of gamma rays as selective means for determining an element of interest专利检索-放射性材料化学元素和化合物专利检索查询-专利查询网

Resonant scattering of gamma rays as selective means for determining an element of interest

阅读：998发布：2023-09-10

专利汇可以提供Resonant scattering of gamma rays as selective means for determining an element of interest专利检索，专利查询，专利分析的服务。并且A radioactive logging method and apparatus for quantitatively determining an element of interest in subsurface formations traversed by a borehole. Earth formations are bombarded with fast neutrons causing the various elements to emit characteristic gamma rays. These gammas strike resonant scatter material which is specially selected to elastically scatter only those gammas derived from the element of interest. The scattered gammas thus obtained are detected with a scintillator and a photomultiplier.，下面是Resonant scattering of gamma rays as selective means for determining an element of interest专利的具体信息内容。

权利要求

1. A radioactive logging tool adapted to traverse a borehole comprising a. a neutron source for irradiating a subsurface formation with fast neutrons, b. a resonant scatterer for selectively detecting prompt capture gamma rays emitted by an element of interest in said subsurface formation in response to said fast neutrons, said resonant scatterer comprised of a material selected to have a high cross section for resonantly scattering gamma rays emitted by said element of interest and a low cross section for resonantly scattering gamma rays of other energies, c. a scintillation crystal spaced apart from said resonant scatterer for detecting gamma rays resonantly scattered by said resonant scatterer, and d. a photomultiplier optically coupled to said Scintillation crystal, e. said resonant scatterer located intermediate between said neutron source and said gamma ray detecting means.

2. A logging tool according to claim 1 where said resonant scatterer is connected to and rotated by a synchronous motor.

3. A logging tool according to claim 1 where said resonant scatterer is selected from the group of materials consisting of praseodymium and lanthanum.

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Resonant scattering of gamma rays as selective means for determining an element of interest

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