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gamma ray counter
相关语句
  相似匹配句对
     Gamma-Ray Bursts
     γ射线暴研究概况
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     Gamma-ray Emission from Pulsars
     脉冲星的γ辐射
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     Cough counter
     咳嗽计数器
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     On Counter-appeal
     论附带上诉
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     Virus counter
     病毒计数器
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For determining fast neutron radiative capture cross sections a new capture gamma-ray counter of approximately 4π geometry has been developed. The counter is in a sphere shape with a diameter of 1 meter filled with 680 liter liquid scintillator. The tank in shielded by 10 cm thickness of lead and 40 cm thickness of Li-paraffin. A coincidence method is used for reducing background due to neutron capture by the hydrogen in the liquid scintillator. The counter has been successfully...

For determining fast neutron radiative capture cross sections a new capture gamma-ray counter of approximately 4π geometry has been developed. The counter is in a sphere shape with a diameter of 1 meter filled with 680 liter liquid scintillator. The tank in shielded by 10 cm thickness of lead and 40 cm thickness of Li-paraffin. A coincidence method is used for reducing background due to neutron capture by the hydrogen in the liquid scintillator. The counter has been successfully used for measuring the neutron capture cross sections of Au-197, Ta-181 and Tm-169 on a 2.5MeV pulsed Van de Graaff accelerator.

为了测量快中子辐射俘获截面,我们研制了一台测量γ射线的球形液体闪烁探测器,其直径为1m,容积680l。该探测器属4π几何类型,探测器效率达80%以上。为了降低本底,除了用10cm厚的铅和40cm厚的石蜡建成屏蔽室外,还采用符合方法,使本底计数小于100cps。探测器已经在2.5MeV脉冲质子静电加速器上测量了金、钽和铥等元素的辐射俘获截面。

How to measure the water flow in the cased well or water filling well, the traditional methods are using the CBL data or other sonic logging data to analyse, which are indirectional methods. A new cased well wireline service, which is water flow logging tool, can detect the water flow channel, so it directional determine the water layer. The logging tool loaded with a solid state neutrou source, is fixed near the wellbore. Turnning on the switch to act the instantanous oxygen, and making the neutron source...

How to measure the water flow in the cased well or water filling well, the traditional methods are using the CBL data or other sonic logging data to analyse, which are indirectional methods. A new cased well wireline service, which is water flow logging tool, can detect the water flow channel, so it directional determine the water layer. The logging tool loaded with a solid state neutrou source, is fixed near the wellbore. Turnning on the switch to act the instantanous oxygen, and making the neutron source to produce the radioactire action, the gamma ray counter can record the instantanous response data when the water flow pass by the transducer. Analysing the data can directional determine the water flow velocity and estimate the flow magnitude.

探测已下套管的生产井或注水井的附近有无水层或窜槽的水流动 ,传统的方法是用水泥胶结测井图或其它的声波测井图 ,就水泥复盖层进行分析 ,用间接的方法测定水层。文章介绍一种最新的井眼电缆测井方法 ,即水流测井图法 ,可直接探测流体运移路线的变更情况来评估水层。将装有固态中子源的测井仪 ,固定于靠近井筒的区域 ,先开通激活瞬变氧 ,使中子源产生放射作用 ,在水流通过的探测器中 ,伽马射线计数器可记录下瞬变感应特性曲线 ,对这些曲线进行分析 ,就可以直接检测出水流 ,测量出水流的速度和估算出流量的大小

 
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