The First Principle Formula of the Relativistic Heat Conductivity of Coulomb Electronic Plasmas

Making use of the relativistic BBGKY technique,the relativistic generalization of Landau collision integral is botained.Furthermore,we calculate the relativistic hydrodynamic modes up to the second order in the hydrodynamic wave number.Combining Resibois‘ method,we present the first principle formula of the relativistic heat conductivity of Coulumb electronic plasmas for low-order corrections.     

Effects of Arbitrarily Directed Field on Spin Phase Oscillations in Biaxial Molecular Magnets

Quantum phase interference and spin-parity effects are studied in biaxial molecular magnets in a magnetic field at an arbitrarily directed angle.The calculations of the ground-state tunnel splitting are performed on the basis of the instanton technique in the spin-coherent-state path-integral representation,and complemented by exactly numerical diagonalization.Both the Wentzel-Kramers-Brillouin exponent and the pre-exponential factor are obtained for the entire region of the direction of the field.Our results show that the tunnel splitting oscillates with the field for the small field angle,while for the large field angle the oscillation is completely suppressed.This distinct angular dependence,together with the dependence of the tunnel splitting on the field strength,provides an independent test for spin-parity effects in biaxial molexular magnets.The analytical results for the molecular Fes magnet are found to be in good agreement with the numerical simulations,which suggests that even the molecular magnet with total spin S=10 is large enough to be treated as a giant spin system.     

晶柱粘连对CsI:Na转换屏分辨特性的影响

本文用MonteCarlo方法研究了CsI:Na转换屏中晶柱之间的粘连对其空间分辨特性的影响,给出了不同粘连程度下可见光在转换屏中的点扩展函数及相应的MTF曲线.通过几种不同粘连系数下模拟结果的比较可见,要获得一个高分辨的转换屏应尽可能减小晶柱之间的粘连.对于一个实际的转换屏其粘连系数至少应在40%以下,最好控制在20%以内.     

Be,Mg和Ca原子电四极矩E2^1D—^1S跃迁的能级和跃迁概率

利用多组态Dirac-Fock广义扩展平均能级（MCDF－EAL）方法系统地计算了重要的中性原子Be,Mg和Ca单光子电四极矩E2^1D－^1S光谱跃迁概率,计算中考虑了重要的核的有限体积效应,Breit修正和QED修正,所得结果和最近的实验数据及理论计算值进行了比较,此外还从理论上预言了Ba和Mg单光子电四极矩E2^1D－^1S光谱跃迁概率过程,在库仓规范中,跃迁概率A（Be)=3884.9s^-1,跃迁概率A（Mg)=2357.2s^-1和跃迁概率A（Ca)=48.1s^-1。     

Adding a Scripting Interface to Gaudi

Athena,the Software Framework for ATLAS‘ offline software is based on the Gaudi Framework from LHCb^1,The Processing Model of Gaudi is essentially that of a batch-oriented system -a User prepares a file detailing the configuration of which Algorithms are to be applied to the input data of a job and the parameter values that control the behavior of each Algorithm instance.The Framework then reads that file once at the beginning of a job and runs to completion with no further interaction with the User. We have enhanced the Processing Model to include an interactive mode where a User can cotrol the event loop of a running job and modify the Algorithms and parameters on the fly.We changed only a very small number of Gaudi Classes to provide access to parameters from an embedded Python interpreter,No change was made to the Gaudi Programming Model.i.e., developers need not change anything to make use of this added interface,We present details of the design and implementation of the interactive Python interface for Athena.     

^143Pm高自旋态研究

通过熔合蒸发反应^129Te(^19F,4nγ）布居了^143Pm的高自旋态,利用在束γ谱学方法,对^143Pm的高自旋态核结构进行了研究,测量了γ射线单谱和γ－γ符合谱,并进行了γ射线各向异性以及DCO比率分析,建立了激发高能达10535．4keV的能级纲图,其中包括新发现的32条γ射线和17个新能级,用弱耦合模型对^143Pm的晕态能级结构进行了解释。     

离子注入剂量与酒精酵母存活率关系研究

研究了以低能离子注入为手段,来选育斯托尔酒精酵母。在此过程中,如何确定最佳的出发菌株注入时间和限定干燥时间,对所获得的离子注入剂量与酒精酵母存活率关系曲线进行了讨论。     

飞秒激光等离子体中成丝现象的研究

采用光学阴影法和散射光成像,对飞秒激光等离子体中的局域密度涨落进行了,在实验中观察到了成丝不稳定性现象,从理论上对有质动力引起的局域密度涨落进行了分析,分析表明,这种成丝不稳定性主要是由有质动力造成的。     

双重Q62重标度模型的重标度参数经验公式

结出了双重Q^2重标度模型的重标度参数经验公式,其中建立了重标度参数ξV,ξS及ξG与原子核平均结合能之间的联系,利用这套公式可以给出A≥12的所有核的重标度参数值,进而可以采用这些重标度参数值计算有关核过程做出预言。     

低温等离子体氧化α—Si：H薄膜的蓝光发射

通过荧光光谱研究了放电等离子体氧化的α-Si:H薄膜的荧光特性,在450nm-500nm范围内常温下观察到强蓝光发射,发光强度随沉积－氧化的周期数增加而增强。发射带呈七峰结构,位置分别为460nm、465nm、472nm、478nm、485nm、490nm、496nm。实验结果直接证明了蓝光发射与缺陷能级有关,其起源于Si-O结合特定组态而形成的发光中心。