同位素

Isotopes have the same atomic number but different mass numbers.

同一元素的同位素有相同的原子序数不同的质量数。

Training , research and iso - tope production reactor of General Atomic TRIGA

培训，研究和同位素生产反应堆

In this paper, we introduce an experimental set-up, which is rebuilt on the basis of typeDMP-450 coater and applied to AVLIS(atomic vapour laser isotope separation).

1引言激光原子法分离铀同位素是目前世界上一些国家积极探索的、有前途的新课题。

To study the effects of factors such as electromagnetic field and electron temperature on the ion extraction characteristics (extraction time, collision loss ratio) in atomic vapor laser isotope separation, 2-D electron-equilibrium model was used to analyze and simulate the ion extraction process.

为研究各因素对原子蒸气激光同位素分离中离子引出特性的影响，采用二维流体理论电子平衡模型分析计算了引出过程中外加恒定电磁场和电子温度等因素对离子引出特性的影响。

This works provide necessary theoretical direction and useful database to the Atomic Vapor Laser Isotope Separation , which is vigorous in the interaction between laser field and atomic media. Additionally, the technology of controlling electromagnetic pulse can be utilized for optical communication, real time monitor, manipulation of chemical reactions, and phase-sensitive imaging.

论文的工作有助于对光与物质相互作用的物理过程的深入理解，为原子法激光同位素分离工程提供必要的理论指导；同时，脉冲控制技术具有广泛的应用前景，可用于光通讯、实时监控、化学反应的操纵以及生物的相位成像等多方面。

ABSTRACT The technique of melting refractory metal with electron beam is widely used in many fields, for example, vacuum coating, electron beam machine and AVLIS (atomic vapor laser isotope separation), etc.

电子枪加热熔化难熔金属技术在众多的领域中得到广泛的应用，例如真空镀膜、金属切割加工和激光原子法分离同位素（Atomic Vapor Laser IsotopeSeparation，缩写为AVLIS）等。

In atomic vapor laser isotope separation, the metal is heated and melted by electron beam, and some atoms are on the metastable states. In order to analyse the influence of metastable states' deexcitation on vapor physical parameters, such as velocity, temperature, direct simulation Monte Carlo method is used to simulate the 2 D gadolinium evaporation from long and narrow crucible.

在原子法激光同位素分离工程中，金属受电子束的加热而熔化，有一部分原子处于亚稳态能级，为了分析在蒸发过程中亚稳态原子退激对原子蒸气的速度、温度等物理特性的影响，采用直接模拟蒙特卡罗法模拟钆原子蒸发过程，分析亚稳态原子退激过程对蒸气特性的影响。

High temperature evaporation of molten cavity heated by electron beam in crucible is one of the most important processes in the uranium cycling system in atomic vapor laser isotope separation.

电子枪加热坩埚熔池高温蒸发是原子蒸气激光同位素分离铀循环系统的一个重要环节。

The characteristics of the RF resonance method of ion extraction were analyzed to improve atomic vapor laser isotope separation by using the PIC-MCC code to simulate the RF resonance.

为较全面地了解RF共振离子引出方法的特性，使之更好地用于原子蒸气激光同位素分离，用PIC-MCC方法对其进行了模拟。

Isotopes are different varieties of the same element, which have identical chemical properties but differ in atomic weight.

同位素是同一元素的不同种类，它们有着相同的化学特性但是原子重量不同。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。