Cellotriose and cellotetraose were analyzed by electron pray ionization mass spectrometry ( ESI-MS) with negative ion mode. 在负离子模式下对纤维三糖和纤维四糖进行电喷雾电离质谱(ESI-MS)分析。
The distorted wave Born approximation with polarization and post-collisional interaction has been used to calculate the triple differential cross sections for low-energy electron impact ionization of the 3s orbital of argon in coplanar asymmetric geometry. The calculated results are compared with available experimental data. 用包含极化效应和后碰撞作用的扭曲波玻恩近似计算共面不对称几何条件下Ar3s的低能(e,2e)三重微分截面,并与实验进行比较。
The transport process of neutral beam ions in HT-7 Tokamak was simulated by Monte-Carlo method. The neutral-plasma collision processes taken into account, which include the charge-exchange, electron impact ionization, ion impact ionization, etc. 应用MonteCarlo方法,模拟了Tokamak装置中的中性粒子的输运过程,模型考虑了中性粒子在等离子体中的电荷交换、电子碰撞电离、离子碰撞电离等离化过程。
Electron Spray Ionization Mass Spectrometry ( ESI-MS) and Electron Ionization Mass Spectrometry ( EI-MS) were used to elucidate the structure and fragmentation pathway of Cryptotanshinone ( CT). 采用电喷雾电离质谱(ESI-MS)和电子轰击质谱(EI-MS)两种质谱技术,对隐丹参酮的结构和裂解途径分别进行了研究。
The electron impact ionization of hydrogen atoms from the 2s state is studied theoretically by extending the BBK model. 利用BBK模型对电子碰撞电离H(2s)过程进行理论研究,计算了对称和不对称几何条件下的三重微分截面。
The R-V curve of photodiode was fit by "lucky electron" model. It verifies that due to plenty of photo-generated carrier occurred in the depletion region, photocurrent multiplication induced by electron impact ionization is the primary reason of decreasing reverse-bias differential resistance. 采用luckyelectron模型对器件的R-V曲线进行了拟合,结果证实器件反偏微分电阻下降的主要原因是由于pn结耗尽区光生载流子的激增,碰撞电离导致的光电倍增效应所引起。
Collisional ionization rate coefficients of electron impact ionization in a highly ionized Au plasma 激光金等离子体的电子离子碰撞电离速率系数
Influence of Laser Polarization Parameter on the Electron Energy of Optical-Field Ionization 激光偏振参量对电离电子能量的影响
The study of systematic law of electron impact ionization cross sections for H-like ions in ground and excited states 类氢离子基态、激发态的电子碰撞电离截面及系统学规律研究
Thermal Desorption Electron Ionization Mass-Spectrometric Investigations of Purified C_60/ C_70 纯C(60)/C(70)的热解吸电子电离质谱研究
Its working principle and feasibility are analysed and proved by many theory such as electron impact ionization, equilibria system of high-energy particle beams and recombination properties of plasma produced. 运用电子碰撞电离、强流粒子束平衡体系理论方程与等离子复合特性等理论对这种新型X射线激光器的工作原理及其方案的可行性作了进一步的理论分析与探讨。
Based on our earlier paper, the triple differential cross section for electron impact ionization atomic helium are calculated by use of Coulomb waves with an effective charge for the initial channel wave function. 在前期工作的基础上,当初通道使用具有有效电荷库仑波时,完成了电子入射离化氦原子三重微分截面的理论推导。
The time-of-flight mass spectrometer ( TOFMS) with electron collision ionization for chemical analysis of materials is developed by ourselves. 自行研制了电子碰撞离子化的飞行时间型质量分析器(TOFMS),用于物质的化学分析。
The atomic processes of electron impact ionization and elastic scattering by plasma ions are included. The thermal and streaming motion of the ions along the magnetic field is also taken into consideration. 考虑了氦原子被电子碰撞电离,氦原子与等离子体离子之间的弹性散射等原子过程以及离子的热运动和沿磁力线的流动。
According to the electron collision ionization theory of Townsend, the electron avalanche is the basic process in gas discharge. 根据汤逊电子碰撞电离理论,电子崩是气体放电最基本的过程。
No HCO+ ions from lower energy dissociation channel ( which are dominant in both electron impact and single-photon ionization mass spectra) appear as a result of state-selective excitation. 在电子轰击和单光子电离中占优势的低能阈离解通道离子HCO~+,由于态选择性激发的结果而未出现。
With electron ionization ( EI) mass spectra and metastable ion measurement, a study of fragmentation of N-2-styrylphthalamide and its derivatives are described in this paper. 本文通过电子轰击(EI)质谱和亚稳跃迁测定,对N-2-苯乙烯基和取代N-2-苯乙烯基的一系列化合物的裂解过程进行了研究。
For calculating integrals involving four confluent hypergeometric functions, a general theoretical method is presented, which is valid for both symmetric and asymmetric geometries to determine the triple differential cross sections ( TDCS) for electron impact ionization of ions. 解决了包含四个合流超几何函数的数值积分问题,从而给出了计算电子碰撞电离离子三重微分截面的通用方法,适合于中、高入射能量下的各种几何条件。
The electron ionization mass spectra of the title compounds are studied based on the data of crystal structure and the view of structural chemistry. 本文从结构化学角度,阐述了标题化合物的EI质谱断裂行为。
The computation on the rate coefficient of electron ion collisional ionization is described and some fitting formulas are given for the accurate and fast calculation. 主要讨论了电子与离子碰撞电离速率系数的计算,给出了快速拟合计算公式。
The influ-'ences of inner-shell electron ionization on cross sections and rate coefficients have been researched. 研究了内壳层电子电离对截面和速率系数的影响。
Electron impact ionization no relativistic transition matrix element for H like ions 电子碰撞类氢离子电离非相对论跃迁矩阵元
A Comparison of Fast Atom Bombardment and Electron Ionization Mass Spectra of DiisopropylPhosphoryl Protected Amino Acids N-二异丙基磷酰基氨基酸的电子电离和快原子轰击质谱的比较
Improved fitting formulas of rate coefficient of electron ion collisional ionization 电子与离子碰撞电离速率系数的一个改进的拟合公式
We compute the triple differential cross section for electron impact ionization atomic helium using Coulomb waves with an effective charge for the incoming electron and find very agreement with experiment and with previous calculations. 当入射电子处在有效电荷库仑场的情形下,我们计算了电子入射离化氦原子的三重微分截面,并发现现有的理论计算与实验结果很好的一致。
Analysis of Cryptotanshinone by Electron Spray Ionization Mass Spectrometry and Electron Ionization Mass Spectrometry 隐丹参酮的电子电离和电喷雾电离质谱分析
With the small oxygen content, the hydrocarbon chemistry reaction was improved, and caused a higher content of excited particle C2. ( 4) Due to the lower electron energy, electron collision-induced ionization played a major role. 随氧气含量的减少,碳氢化学反应增强,C2激发态粒子含量增加。(4)由于等离子体中的电子能量较低,电子的碰撞诱导电离起主要作用。
This thesis based on the electron collision ionization theory of Townsend and streamer theory, subnanosecond gas switch breakdown process is modeled and simulated with the finite element software ANSYS. 本文以汤森德放电理论和经典流注放电理论为基础,用有限元软件ANSYS对亚纳秒气体开关的击穿过程进行建模仿真。
This thesis presents a systematic and complete theoretical study on the electron impact ionization processes, which consists of electron-atom, by using the BBK method. 本论文的主要部分是用BBK方法对电子碰撞电离过程进行较为系统全面的理论研究。