低能正电子与氪,氙原子散射角分布的理论研究

用模型势方法对正电子与氪，氙原子散躯有分布进行了系统计算，通过对算得的微分截面的数据分析，结合作者以前对正电子与氦，氖，氩原子散射角分布的研究结论总结出了代能正电子与稀有气体原子散射角分布规律。     

中高能量电子被NO_2和SO_2分子散射总截面的研究

用模型势方法对正电子与氪、氙原子散射角分布进行了系统计算，通过对算得的微分截面（散射角从２０°－１６０°）的数据分析，结合作者以前对正电子与氦、氖、氩原子散射角分布的研究结论，总结出了低能正电子与稀有气体原子散射角分布规律     

正负电子被汞原子非弹性散射的光学势模型方法计算

文中运用先学势模型计算了正负电子被重原子汞散射的总截面（能量０．１ｅＶ－４００ｅＶ），与实验进行了比较，并对理论值与实验值的差异进行了讨论，证明了光学势模型对重原子也是适用的。     

一种不含自由参数的正电子吸收势

在准自由电子气模型的基础上得到一种不含自由参数的正电子吸收势，把它作为光学势的虚部，计算了能量在最小非弹性阀值到１００ｅＶ范围内正电子被Ｈｅ、Ｎｅ、Ａｒ原子散射的总截面和能量为２００ｅＶ和３００ｅＶ时的散射微分截面，计算结果与实验进行了比较。     

热等离子体中电子弹性散射的屏蔽效应

采用平均原子模型计算了Ａｒ，Ｆｅ等离子体电子的弹性散射微分截面，考虑了温度密度效应对微分截面的影响，结果表明，在低温低密度极限下，计算结果与可用的实验值及其它理论符合得很好，而在其它的温度密度范围内来自温度的影响比来自密度的影响更复杂，二者对电子弹性散射微分截面都产生很大影响。     

e^＋—Kr和e^＋—Xe弹性散射截面的模型势计算

用模型势方法计算了低能正电子与Ｋｒ、Ｘｅ原子弹性散射总截面与动量转移截面，并将本文的计算结果与理论计算及实验值作了比较。     

用原子势模型理论对碱金属原子能级和精细的研究

用最弱受约束电子势模型理论方法，研究了碱金属原子的能级和精细结构的表达式，由实验给出的精细结构间隔数据，得到了一组既适合精细结构计算，又适合能级计算的有效量子数ｎ′和有效电荷数Ｚ′，使二的计算统一在同一组ｎ′和Ｚ′之下。     

氦原子与一氧化碳分子各向异性势的计算研究

本文用高精度的量子力学ab initio方法计算了氦原子与一氧化碳分子相互作用各向异性势能面,通过三重激发校正耦合簇、二次组态相互作用等方法和不同基组的计算结果比较,并采用BSSE方法消除了基组重叠误差,得到了氦原子与一氧化碳分子体系相互作用各向异性势,然后采用精确度较高的密耦（Close-Coupling）近似方法,研究了氦原子与一氧化碳分子碰撞的散射截面,通过计算得出了该体系碰撞激发微分截面和分波截面,计算得到的微分截面数据与实验值符合较好,说明本文得到的势能面是准确的.     

BeCl_2分子的低能电子弹性散射研究

基于R矩阵理论方法,通过构建BeCl_2分子的静态交换势模型(SE),静态交换加极化势模型(SEP)和密耦合模型(CC),在0-10 eV能量范围内首次研究了低能电子与BeCl_2分子的散射动力学过程,预测了弹性散射积分截面,并在三种模型中分别发现一个来自B_(2u)和B_(3u)对称性贡献的势形共振态.讨论了这些共振态随着极化效应的变化,获得了收敛的截面和共振态结果.进一步使用POLYDCS程序首次计算了电子与BeCl_2分子的散射微分截面(DCS)以及动量转移截面(MTCS).当前研究结果将为天体物理和等离子体物理提供重要的截面数据.     

惰性气体黏度的剩余熵标度模型

黏度是能源、动力、化工等系统设计分析中常用的重要物性参数.本文探讨了5种惰性气体(He、Ne、Ar、Kr、Xe)气相和超临界黏度的计算,以实际气体与同温度稀薄气体的黏度之比作为无量纲对比黏度,发现5种惰性气体的无量纲对比黏度与剩余熵之间满足同一单值函数关系,据此建立了惰性气体的气相和超临界黏度模型,其中稀薄气体黏度关联...     

Elastic Scattering of Ultrashort Laser Pulses on Noble Gas Atoms

Russian Physics Journal - The work deals with a theoretical investigation of elastic scattering of ultrashort electromagnetic pulses (USP) on the noble gas atoms in the far ultra-violet and soft...     

Generation of K-Shell Radiation of Noble Gases in the Microsecond Implosion Regime

Russian Physics Journal - Studies of K-shell plasma radiation sources were performed on the GIT-12 generator (4.7 MA, 1.7 μs). In the experiments, a new type of load configuration was used to...     

The Theory of Ionization Waves in the Contracted Discharge of Noble Gases

Positive column plasma in noble gases at middle pressures is analysed for stability in the frames of the linear hydrodynamic theory. At critical values of pressure and current the discharge becomes unstable to radial contraction (contraction) and to wave disturbances of the type of current pinch constrictions (contraction ionization waves). Ionization waves in the contracted discharge are three-dimensional formations with electron concentration oscillations on the axis in the opposite phase with current pinch cross section. The discharge diffuse-recombination theory was used for analysing the problem of instability arising.     

Free‐Electron Gas Spectrum Uniqueness in the Mixture of Noble Gases

Gas mixtures can reach the Maxwell's specter shape in case of low‐ionized mono‐atomic mixtures in the weak electric field. The parameters pertaining to the Maxwell spectrum of free electrons' gas straightforwardly settle on the insulating characteristics of the examined gas mixture at the fundamental level. In this paper, a condition for breakdown has been accomplished taking as a starting point the ionization coefficients derived accordingly, as well as the conditions for breakdown in keeping with the Townsend mechanism. The dc breakdown voltage value of noble gases mixture has been measured in the experimental part of the paper. The hypothesis that the free‐electron gas spectrum is unique in the noble gas mixture and is of Maxwell's type has been verified. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Simulation of Femtosecond Pulse Propagation through Hollow Fibre Filled with Noble Gases of Gradient Temperature

We propose a novel technique for generating intense few to mono-cycle femtosecond pulses. The simulation demonstrate that for the temperature difference of 300K, the spectrum of the output pulses is increased by 67% and the transform limited pulse width is reduced almost by half, compared with those obtained with hollow fibres in uniform temperature.     

Low-energy anti-neutrinos from the sun

If neutrino conversions within the Sun result in partial polarization of initial solar neutrino fluxes, then a new opportunity arises to observe the 's in future neutrino experiments in the low energy region (such as BOREXINO or HELLAZ) and thus to probe the Majorana nature of the neutrinos. The conversions may take place for low energy solar neutrinos while being unobservable at the Kamiokande and Super-Kamiokande experiments.     

Chemical-Shifts in Magnetic-Resonance of the 3He Nucleus in Liquid Solvents and Comparison with Other Noble Gases

Gas-to-solution solvent shifts of ³He dissolved in 17 pure liquids were measured. Two types of samples were used, under helium pressures of about 2 and 30 atm. No measurable pressure effect on the shift could be detected. The gas-to-solution shifts are dominated by the bulk susceptibility, for which correction was made. The resulting medium-shift range in our solvents is about 0.8 ppm. Hence ³He provides an excellent probe for the detection of minute local magnetic fields at the site of noble-gas atoms. For the first time shifts in liquid solvents for all four NMR-accessible noble-gas nuclei (³He, ²¹Ne, ⁸³Kr, and ¹²⁹Xe) can be compared. The medium shifts of ³He show a roughly linear correlation to medium shifts of ¹²⁹Xe, ⁸³Kr, and ²¹Ne in the same solvents. The corrected relative solvent shifts, that is, the solvent effects divided by σ_d, the diamagnetic shielding of the free atom, and by the number of nearest-neighbor solvent molecules, are approximately equal for all four noble gases.