电离

The influences of some relevant parameters on resonance ionization efficiency in the recent laser pulse time-delayed scheme were analyzed with the framework of time-dependent Schrdinger equation. As a versatile example, the feasibility of this scheme applied to lutetium isotopic analysis by Laser Resonance ionization Spectrometry was discussed.

针对宁西京教授提出激光脉冲延时方案，在含时薛定谔方程理论框架下探讨了各种参数对激光共振电离效率的影响；并以镥原子共振电离为例，探讨了该方案用于激光共振电离质谱同位素分析的可行性。

A maximum method for measuring surface tension coefficient;2. A discussion on the maximum positions of a function and its transform;3. There are the minimum and the maximum of ionicity of weak acid and weak base.

在化学教学中，涉及到弱酸和弱碱的电离度，弱酸和弱碱的电离度存在极小值和极大值，用稀释定律求算电离度会引起的一定的误差。

The relationship between spectral line intensities from different species in the plasma and neutron yield and shot number shows that: with high neutron yield, the deuterium ionization degree is high; nitrogen and oxygen atoms are also ionized to a higher ionization state; electron beams emitted at the collapse time of plasma pinch column may cause strong electrode sputtering processes.

可见光谱中氘、金属材料Cu、Fe和空气成分O、N的原子或离子谱线强度与中子产额和放电次数的关系证明：中子产额高时，氘气的电离率高，N、O等杂质气体也被电离到高电离态，焦点箍缩柱崩溃时发射的强电子束可以引起强电极溅射过程。

The photoionization cross sections of Al Ⅶ are calculated from the first ionization threshold to the K shell.

由得到的光电离截面，确定了一些自电离态的共振能量和宽度，结果表明，内壳层激发态的自电离宽度较大。

In this paper, using REMPI-TOF technique, multiphoton dissociation/ionization of sulfur and carbon contained polyatomic molecule has been carried out. The mechanism ofmultiphoton dissociation/ionization was discussed, and some valuable results are obtained. The paper has six chapters.

本论文用共振增强多光子电离-时间飞行质谱等实验技术研究了二硫化碳、甲醇和乙醛分子的多光子解离或电离的动力学过程，对多光子解离或电离产物的产生机理进行了分析和讨论，得到了一些有意义的实验结果。

The threshold of lithium tantalite under single-shot is found to be 1.84J /cm 2 and the avalanche rate was determined to be 1.01 cm 2 /J by calculation. We found that avalanche dominates the ablation process, while photoionization serves as a free electron provider.

在800nm飞秒激光脉冲作用下，钽酸锂晶体单脉冲烧蚀阈值为1.84 J /cm 2；在此基础上，我们通过建立钽酸锂晶体中导带电子密度演化微分方程，并数值求解，得到了钽酸锂的碰撞电离速率系数为1.01 cm 2 /J ，并得出在钽酸锂表面烧蚀中，光致电离提供种子电子，雪崩电离起主导作用的结论。

Paired ionization chambers used for the dosimetry of mixed gamma-neutron field in reactor, consist of a tissue-equivalent chamber which responds to both neutron and gamma radiation, and a nonhydrogenous chamber which is relatively insensitive to neutron.

采用对中子和γ辐射具有相似灵敏度的组织等效电离室与对中子不太灵敏而对γ辐射灵敏的无氢电离室配对，组成双电离室探测器，测量反应堆混合场中的中子和γ剂量率，具有较高的测量精度。

In the third chapter, the photoabsorption of NO, CO, acetonitrile, acrylonitrile, benzene and toluene of benzene series have been measured by using a homemade experimental apparatus of cylindrical multi-stage ion chamber with high flux SR source. The ionization energies of some electron states are given. Their superexcited states, autoionization Rydberg states have been analyzed. By the analysis and comparison, our results are accurate and credibility.

在第三章中，利用高通量的同步辐射光源和自制的多级光电离吸收池装置，测量了NO、CO、乙腈、丙烯腈、苯系物中的苯和甲苯的光吸收谱，给出了部分电子态的电离能，分析了其中的自电离Rydberg态结构和一些振动能级，对部分结构做了精确指认，经过分析和比较，我们所得的结果比较精确和可靠。

The basic conceptions, including adiabatic ionization energy, vertical ionization energy, superexcited states, photoionization cross section, Rydberg state of atomic and molecular, dissociation and predissociation are discussed in detail.

着重讨论了同步辐射真空紫外光在原子分子研究领域中的应用，详细讨论了光与物质相互作用的一些基本概念，包括绝热电离能、垂直电离能、超激发态、光电离截面、原子分子的Rydberg态及离解和预离解的定义及相关的背景知识。

Based on the experimental data of low (less than 13) ionization energy of lighter elements, the function of shielding coefficient, electronic states and atomic number is summarized when the atom ionizes electron in different electronic state of the second and first shell.

依据较轻元素原子低次（小于13）电离能实验数据，总结出原子电离第2、1壳层不同电子态电子时，相应的屏蔽系数与电子态及原子序数的函数关系，根据该函数关系，可求出相应原子的高次电离电子的屏蔽系数。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。