slow neutron

Static measurement of thickness of steel plate using slow neutron beam

慢中子束对钢板的静态测厚研究

Study of detection efficiency of slow neutron proportional counter

慢中子正比计数器探测效率研究

The static method is used to measure the thickness of steel plate by means of slow neutron beam .

利用慢中子束对钢板厚度的静态测量方法进行了研究。

Abundance Distribution in the Solar System and Slow Neutron Capture Elements in AGB Stars

太阳系的元素丰度分布与AGB星慢中子俘获元素

Effect and mechanism of slow neutron irradiation with low fluence in normal resistivity of superconductors

低通量慢中子辐照对高Tc超导体正常态电阻的影响及其机理探讨

Abundances of Metal-Poor Stars and Slow Neutron - Capture Progress

贫金属星的表面丰度与慢中子俘获过程

The detection efficiencies of typical slow neutron proportional counters and the correction coefficients for Maxwell spectra are deduced .

推导出典型几何计数器中子探测效率及热能谱修正系数。

Scintillator slow neutron detector

闪烁体慢中子探测器

For selecting nuclides to transform slow neutron into gamma photon effectively , the main decisive aspects are analyzed basing on relative cross section data and a specific model is calculated by using S N method .

为选出能有效地实现慢中子γ光子转换的核素，根据有关截面数据分析了主要的决定因素，并结合具体模型用离散纵标法作了计算。

This work studies the effect and mechanism of slow neutron irradiation of low fluence ( ~ 10 ~ 8n / cm ~ 2 ) in normal resistivity of Y and Bi system and the doped high T_c superconductors .

研究了低通量（～10~8n/cm~2）慢中子对Y系、Bi系及其掺杂高Tc超导体（HTSC）正常态电阻的影响及其机理。

The experimental results indicate that the normal resistivity R not only follows the law that R is increasing exponentially with the enhancement of fluence φ _n , but also decreases greatly after irradiation of slow neutron with low fluence .

实验结果表明，HTSC在低通量慢中子辐照后，正常态电阻R不仅不遵从随辐照通量φn按指数增加的规律，而且还会较大幅度地减小。

Tt has been proved by experiments , that two plateform distributions in the low energy section of nuclear pulse distribution curve of slow neutron reaction in BFs proportional counter is caused by wall effect of reaction product-helium and lithium nuclei .

本文从实验上证明，BF3正比管慢中子反应核脉冲分布曲线低能段的两个平台式分布，是由于反应产物氦核及锂核的管壁效应所引起的。

The slow neutron detectors move down and up in the tank and scan dynamic ally the material in different height . On the basis of the different slow neutron counting rate of gas , oil and water , the three-phase interface heights are determined .

慢中子探测器和中子源组成的探头在储油罐内升降移动，动态扫描不同高度的物料，根据气、油和水的慢中子计数率不同，测定出三相界面的高度；

Ranges of the fragments from thermal ( slow ) neutron fission of ~ ( 235 ) u in water

~（235）U热（慢）中子裂变碎片在水中的射程

Berry 's geometric phase was obtained by taking the adiabatic limit on the exact evolutional wave function and was compared with the slow helical neutron experiment done by Bitter and Dubbers .

对演化波函数取绝热极限可得到Berry几何相，并将这些结果与Bitter等的慢中子实验做了比较。

It was known that a slow moving neutron has a much greater chance of scoring a hit because when it gets near the nucleus , the neutron will be attracted by a kind of gravitational force .

我们已经知道：缓慢运动着的中子的命中率要大得多，因为，当中子靠近原子核时，它会被一种引力所吸引。