查询词典 neutron

When two deuterium nuclei (each containing a deuteron are proton, one neutron) polymerization into a helium-4 nucleus, releasing a large number of atomic energy.

因为当2个氘核（每个氘核都含有1个质子、1个中子）聚合成1个氦4原子核时，释放出大量的原子能。

Enhanced cross section; neutron formation; particle-wave transformation; resonance, tunneling and screening; exotic particles; formation of proton or deuteron clusters; formation of electron clusters.

改进的横剖面；中子形成；微粒挥动变革；共鸣，挖洞和筛选；异乎寻常的微粒；氢核或氘核群的形成；电子群的形成。

A mathematical model and a program are developed to calculate neutron yields, energy spectrum and angular distribution of D^3 He reaction in a thick deuterium-titaniumTiD(subscript x target as incident deuteron energy lower than 1.0 MeV.

给出一种计算氘钛厚靶D^3 He反应加速器中子源的产额、能谱和角分布的方法，并发展了一个计算机模拟程序，程序能够计算氘束流能量小于1.0 MeV的中子源的产额、能谱和角分布。

Objective To explore the significance of the differentially expressed genes in mouse bone marrow after exposure to neutron irradiation.

目的 探讨中子照射后小鼠骨髓差异表达的基因及其意义。

Firstly, based on the common design notion of powder neutron diffractometer presented by Dr.

在衍射技术中，使用得最多、最广泛的是粉末衍射方法。

In this beamline, with the neutron depolarization technique, provides information of the mean domain size, the mean square direction cosine of the magnetic induction in the domains, and the mean magnetization of a magnetic sample.

三维去极化中子仪主要为观察极化中子通过磁性材过程，受到内部磁区的扰动使得极化中子向的方向和大小改变，进分析后可以观察出材内部平均磁区大小、平均感应磁场强、磁区平均方向余弦的平方。

Characteristics of the detector, including the sensitivity to 14MeV neutron and 1.25MeV γ ray, n/γ discrimination, time response, and statistics are studied theoretically and experimentally.

从实验及理论上对组合探测器的14MeV中子及1.25MeV γ灵敏度、n/γ分辨，时间特性和测量统计性进行了研究。

The neutron flux at different wavelength, under different reflection and take-off angle of the monochromator and divergency of the first collimator, were given.

结果表明，在冷中子导管使用〓Ni和m=2的超镜镀膜情况下，所需要的冷中子源直径为18cm～22cm，高度为30cm～36cm，并从导管需求的角度为合理的冷源尺寸提出了建议。

The performance of the CNGs, including transmission efficiency, neutron flux, flux spectrum, divergency, uniform and gravity effect, have been analysed technically.

在满足导管出口中子束的均匀化效果前提下，模拟计算出弯导管后的直导管的最佳长度。

The position and size of the monochromator, focusing curvature radii and tilting angles of the germanium focusing monochromator under different different take-off angle, size and divergency of the second collimator and intensity loss due to the use of it were determined. The neutron flux at different wavelength, under different reflection and take-off angle of the monochromator and divergency of the first collimator, were given. The simulation on the aperture used for limiting beam size in front of the sample showed that, smaller the size of the aperture and further the distance from the aperture to the sample, greater the loss of the intensity and more serious the spread of the beam along vertical direction at the sample position which makes the practical sampling volume greater than expected.

用蒙特卡罗模拟方法对中子应力衍射谱仪的设计方案进行了优化研究，提出了一系列可供参考的数据：确定了单色器的位置、尺寸、垂直聚焦单色器在不同起飞角下的聚焦曲率半径和倾角；讨论了第二准直器的尺寸和发散，以及使用第二准直器造成的强度损失；给出了在不同单色器反射面、起飞角、中子波长和第一准直器发散度的情况下样品处的中子注量率，以及多种组合情况下谱仪的分辨率曲线；对限束方孔的尺寸、距离样品远近对强度损失和测量中的影响做了深入研究。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。