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Search Results: 1 - 10 of 72025 matches for " MA XING-XIAO "
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THE KINETICS OF LASER ISOTOPE SEPARATION
激光分离同位素的动力学

MA XING-XIAO,
马兴孝

物理学报 , 1979,
Abstract: In this paper, the isotope enrichment processes were described generally. A kinetic model involving its mechanism and equations was set up in attempt to represent a great number of processes corresponding to various ways and methods in laser isotope separation. The simplified results for typical cases were given, upon which the high selectivity conditions were derived. Finally, the effects of reversible reaction to the isotope enrichment was investigated.
THE KINETIC TREATMENT OF ISOTOPE ENRICHMENT PROCESS UNDER FOCUSED IR LASER PULSE
红外聚焦脉冲激光场中同位素浓缩过程的动力学处理

MA XING-XIAO,HU ZHAO-LIN,
马兴孝
,胡照林

物理学报 , 1978,
Abstract: In this work, the expressions of molecular dissociation rate and isotope enrichment coefficient in an strong IR field, as the functions of the laser energy per pulse, the focal length of lens, the number of laser pulses, and etc., were derived by using the kinetic theory. The theoretical expression of isotope enrichment coefficient was compared with the experimental results for SF6, and good agreement was found. In addition, the theoretical expressions compared with experiments would provide some useful informations of the molecular dissociation in the strong IR field.
AN APPROACH OF ESTIMATING EXCITATION CROSS SECTIONS IN MULTIPHOTON PROCESSES

RAN QIN,ZHANG LI-MIN,DAI JING-HUA,MA XING-XIAO,

中国物理 B , 1997,
Abstract: We suggest a simple approach to roughly estimate the excitation cross sections of various steps in a multiphoton ionization (or dissociation) process by applying the measured dependence of product signal on laser intensity. The validity of this method is demonstrated theoretically by means of the rate equations based upon a two-step kinetic model and can, in principle, be extended to the multiphoton process with steps more than two. Some results of numerical test and experiment are quoted.
THEORETICAL TREATMENT OF RESONANCE RADIATION IMPRISONMENT SOLUTION TO HOLSTEIN''S EQUATION
共振辐射的理论研究——Holstein方程的解

LAI RE,LIU SHI-LIN,MA XING-XIAO,
赖热
,刘世林,马兴孝

物理学报 , 1993,
Abstract: The key to the treatment of the resonance radiation imprisonment lies in the solution to Holstein's equation. A new method to solve Holstein's equation is proposed in this paper, which integrates the equation directly by means of operator calculation and results in a formula for the excited particles in an infinite series in an integral operator. Our study on the behavior of the high-ordercoefficients of this series leads to the success in overcoming the difficulty to obtain the sum of infinite terms, and a formula of finite terms under any given precision is acquired, which applies to the whole time scale.
THEORETICAL TREATMENT OF RADIATION TRAPPING OF ATOMIC FLUORESCENCE IN V-E ENERGY TRANSFER
V-E传能中原子荧光辐射束缚的理论处理

WANG CHU-JI,WANG JIAN,MA XING-XIAO,
王储记
,王 坚,马兴孝

物理学报 , 1998,
Abstract: A differential-integral equation system of Holstein type is used to describe the kinetic process in V-E energy transfer between molecules and atoms with radiation trapping.A reduced solution of a finite series has been presented,which allows to describe the whole temporal behavior of fluorescence.The further derivative is an analytical expression of the fluorescence decay rate as a function of rate constants and the maximum eigenvalue of the integral operator appearing in the rate equations.This will be especially useful and convenient for experimental determinations.Results are schematically illustrated and mutually compared by means of numerical calculations.
THEORETICAL TREATMENT OF RADIATION TRAPPING IN A MULTIPLE LINES COUPLED SYSTEM
多谱线耦合系统辐射束缚问题的理论处理

LAI RE,WANG JIAN,WANG CHU-JI,MA XING-XIAO,
赖热
,王坚,王储记,马兴孝

物理学报 , 1997,
Abstract: 提出一种处理多荧光谱线耦合系统辐射束缚问题的理论方法.这里的耦合包括激发态间的碰撞传能和当谱线重叠时对荧光的交叉吸收.首先将描述辐射束缚的Holstein方程扩展为适用于描述多个激发能级且包括交叉耦合项的微分积分方程组,并将其纳入矢量、矩阵的形式.然后直接通过算符运算求解,给出按算符展开的级数解式.最后对级数解进行约化,导出一个只用有限项便可对系统行为进行完整描述的、远较简单截断近似优越的结果.还给出了一个双激发能级系统的计算实例
LASER-INDUCED FLUORESCENCE EXCIATION SPECTRUM OF OXALYL CHLORIDE
草酰氯的激光诱导荧光激发谱

LU QING-ZHENG,CHEN YANG,TANG SONG-BAI,MA XING-XIAO,
陆庆正
,陈旸,唐松柏,马兴孝

物理学报 , 1991,
Abstract: 本文报道草酰氯C2O2Cl2在358—372.5nm范围的激光诱导荧光(LIF)激发谱。对60多条振动谱带进行了归属,其中24条是吸收光谱中没有的。由振动结构得到C2O2Cl2分子在X基态和?激发态的部分振动频率,其中v"7=84cm-1和v'7=164cm-1是新的数据。对401振动带的转动结构的分析给出转动常数A=0.190cm-1,B=0.114cm-1,C=0.048cm-1。
RESONANCE-ENHANCED MULTIPHOTON IONIZATION SPECTRA OF THE HALOGEN ATOMS

Chen Yang,Pei Lin-sen,Jin Jin,Ran Qin,Chen Cong-xiang,Yu Shu-qin,Ma Xing-xiao,

中国物理 B , 1999,
Abstract: The resonance-enhanced multiphoton ionization (REMPI) spectra of atomic chlorine and bromine in the range of 230-245 nm and 250-285 nm were obtained by using REMPI and time of flight (TOF) techniques. There are twenty -six lines for Cl and twenty-three for Br in the spectra, among which five transitions of Cl and four of Br are observed for the first time. These lines are due to transitions from the Cl(3p 2P03/2, 2P01/2) and Br(4p2P03/2, 2P01/2) states to upper states induced by two-photon excitation. It is found that the Stark shift of different excited states are almost the same, and they are independent of the S, L, and J quantum numbers of the excited state.
TWO PHOTONS EXCITED 4d RYDBERG STATE OF AsH3

Ran Qin,Pei Lin-sen,Wang Fei,Chen Yang,Chen Cong-xiang,Yu Shu-qin,Ma Xing-xiao,

中国物理 B , 1998,
Abstract:
GAS DYNAMIC PROBLEMS CAUSED BY THE GENERATION OF THE RADICALS IN A SUPERSONIC JET

LIU SHI-LIN,ZHANG LI-MIN,CHEN CONG-XIANG,MA XING-XIAO,ZHU NIAN-LIN,

中国物理 B , 1995,
Abstract: A simplified one-dimensional model was proposed to treat the gas dynamic problems in a supersonic jet, which was used to produce radicals cooled by supersonic expansion, Based on this model, the gas dynamic equations can be integrated directly to obtain the evolution or the translational temperature and the rotational temperature of free radicals as well as the molecule density. The results show that the heating position where the radicals are generated and the initial rotational temperature of radicals have little effect on the rotational temperature at the down stream detection point, if the heating position is close to the nozzle orifice.
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