查询词典 fast neutrons

The most common isotope of oxygen, for example, has an atomic weight of 16, but there are also rarer isotopes with weights of 17 and 18, caused by additional neutrons in their nuclei.

例如很常见的同位素氧，原子重量是16，但是还有更为稀少的重量为17和18的同位素，这是因为它们的原子核中有额外的中子。

Electron neutrinos are generated whenever neutrons change into protons, the two forms of beta decay.

电子型中微子在中子转化为原子时被生成，即两种贝塔衰变的模式。

Neutrons are the only known type of particle that will interact with germanium nuclei in the billiard ball style that WIMPs would.

中子则是仅知的可以跟锗核进行类似台球那样的弹开的反应的粒子，WIMP跟锗核也是这种类型的反应。

Plus neutrons, in the nucleus cloud chamber photograph, an unknown nucleus collides with a 44He nucleus, and after the collision tHe nucleus, and after the collision the two he two particles nuclei nuclei travel in perpendicular directions relative to each other.travel in perpendicular directions relative

如右图所示，在如右图所示，在44HeHe（左上角的数字为核子数，即在核子中的质子和中子数之和）云室照片中，一个未知核子与（左上角的数位为核子数，即在核子中的质子和中子数之和）云室照片中，一个未知核子与44HeHe核子碰撞，碰撞后两个核子以彼此垂直的方向运动。

Einstein's mass-energy relation formula, the correct interpretation of a variety of nuclear reactions: Take helium-4, it is the nuclei from two protons and two neutrons formed.

爱因斯坦的质能关系公式，正确地解释了各种原子核反应：就拿氦4来说，它的原子核是由2个质子和2个中子组成的。

"As neutrons pass through matter, they make occasional elastic collision s with nuclei."

当中子穿过物质时，偶而与核发生弹性碰撞。

Detailed knowledge of the microscopic structure and dynamics of condensed matter can thus be obtained by means of the elastic and inelastic scattering effects of thermal neutrons.

因此，利用热中子的弹性和非弹性散射效应，可以从微观层次上获取物质的结构和动力学知识。

At that time, the universe was a pot of elementary particle soup, comprising protons, neutrons, and electrons.

这时的宇宙是由质子、中子和电子组成的一锅基本粒子汤。

At that time, Fermi was trying to measure the interaction between neutrons and electrons.

当时，费米试图测量中子和电子的相互作用力。

In this work we used a coincident measurement of fragmental products with neutrons and selected that fragmental which hardly be disturbed by reactions.

前者是用与中子符合的方法来挑选的。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。