THE ROTATIONAL THREE-BAND INTERACTION FOR EVEN-EVEN NUCLEI

The interaction of the rotational three-band, the superband, the g band and theβ band (or γ band), for even-even Nuclei is discussed. The Hamiltonian matrix is diagonalized after solving the secular equation bywhich the parameters in the matrix elemen s are determined. The three-band spectrafor more than ten nuclei have been calculated. The calculated results are found to bein resonable agreement with experimental data, and some informations of three-bandmixing are obtained.     

旋转二次曲面的成像公式

从焦点和焦点参数出发，研究光在旋转二次曲面上的折射和反射。     

THE EMC EFFECT OF ROTATIONAL NUCLEI

The effect of nuclear rotation to the EMC effect is discussed and a method for measuring nuclear collective rotational current suggested.     

CHARGE DENSITY DISTRIBUTIONS OF DEFORMED NUCLEI

A simple calculation method for charge for charge density distributions of deformed nuclei by using macroscopic model has been proposed.The calculations of charge density distributions for ¹⁹²Os,¹⁵⁴Gd,¹⁵²Sm,¹⁷⁴Yb, and ^{144,148,150,152}Sm nuclei have been performed.The results show that the calculated charge densities are in good agreement with experiments.Consequently,on the base of experimental data of the transition probabilities for ground state to 2⁺,4⁺,6⁺ rotational states or its electric multipole moments,The charge density distributions of deformed nuclei can be predicted theoretically by this method.     

环形振子径向矩阵元的通项表达式及其递推关系

利用文献1给出的环形振子的归一化的径向波函数,推导出环形振子径向矩阵元的通项表达式及其递推关系.解决了环形振子径向矩阵元的计算问题.     

氢分子与氦原子碰撞转动激发截面理论计算

当入射氦原子能量为０．０５ｅＶ时，计算了氦原子与氢分子碰撞的弹性散射和第一转动激发截面，用密耦方法计算了５０个分波，得到的分波截面收敛得很好。     

对样品实验比较测试与拉曼光谱分析

通过实验比较测试，利用拉曼光谱对样品进行定量分析，获得了有关化合物及其结构的信息，用以鉴别各种物质的种类和特性，对物质样品的处理和进一步分析提供了重要的参考数据．     

奇A核非轴对称转动波函数与能级的计算

本文给出了利用偶-偶核非轴对称转动波函数与能极,以计算奇A核非轴对称转动波函数与能级的方法。 关键词：     

NEW EXPRESSIONS FOR THE COLLECTIVE EXCITATION SPECTRA IN EVEN-EVEN NUCLEI

The collective spectra of the well-deformed nuclei with small axial asymmetry and the nuclei with large axial asymmetry are investigated separately in the frame of the Bohr Namiltonian. The collective spectra of well-deformed nuclei manifest the vibrational-rotational band structure and each of these bands can be expressed as a 2-parameter closed expression.The agreement between the calculated results and the observed data is very good.From this expression the radius of convergence for the energy expansion in terms of I(I+1) can be estimated and the em- pirical fact that the expansion in powers of rotational frequency converges much more rapidly than that in powers of I(I+1)can be understood. Similarly, the ground state quasi-band of the nuclei with large axial asymmetry can be expressed as a 3-parameter closed expression.     

大变形核中对力对内部激发的影响

本文提出了一个处理原子核中nn及pp对力的近似方法。这个方法避免了通常将BCS-Боголюбов方法应用于原子核所引起的困难,例如粒子数不守恒,假态的出现以及不同激发态波函数不正交等。但这个方法只有在所需考虑的粒子数n及能级数Ω不太大时(n≤10,Ω≤10)才能较方便地被应用,近似程度才比较好。在这个方法中,毋须引入准粒子的概念,激发的多体性质被明显地表示出来。系统的激发可分为两大类型。第一类型激发是一种以多体系为背景的单粒子跃迁,相应于一个准粒子的跃迁α_v⁺α_v,或两个准粒子的激发α_v⁺β_v′⁺,α_v⁺α_v′⁺(v≠v′)。第二类型激发是对激发,在这种激发中,各能级上共轭粒子对的填充几率改变了,相应于共轭的准粒子对的激发α_v⁺β_v⁺,α_v⁺β_v⁺α_μ⁺β_μ⁺,….本文还考察了对力在r及β跃迁中的影响。在β跃迁中,对力一般是使跃迁受阻。在r跃迁中,对力的效应随初末态间的相对激发类型不同而异,如相对激发属于第一类型,则跃迁受阻,受阻程度随跃迁的电磁性质不同而有所差别,如相对跃迁属于第二类型,则在无对力作用时跃迁是禁戒的,在对力作用下也只有由电荷电流所产生的电跃迁是允许的。最后本文以Hf¹⁷⁸为例,应用上述方法,初步分析了对力对偶偶核的内部激发能谱及β衰变的影响。     

两类方法处理两相流表面张力的比较研究

本文针对含有表面张力为源项的不可压 Navier-Stokes 方程,在非交错网格下比较研究了两类处理源项的Projection 方法.并比较研究了网格中心点处,压力梯度和表面张力的两种不同计算技术.表面张力通过 CSF(ContinuousSurface Force) 模型来计算.文中对一初始处于静止状态无外力作用的液滴进行模拟,通过分析虚假流速和压力分布来讨论各方法的优缺点.     

EXCITATION FUNCTION FOR ELASTIC COLLISION BETWEEN 4n NUCLEI

Resonant structures appeared in the excitation functions for the ¹⁶O+²⁰Ne elastic scattering have been studied by using the nuclear molecular orbital theory.The theoretical results agree well with the experimental data.     

微分析中电离截面公式与实验的比较

利用分析电子显微镜在75—200kV电压下测量一系列纯元素的M和L线标识X射线强度比I(M)/I(L)。和以前测定的强度比汇集在一起,把所有实验数据与由8个电离截面公式得出的计算值作了比较,比较前对强度比进行约化以消除不确定的参量只留下截面的电压依赖关系。这些公式对I(L)/I(K)可分为四组,对I(M)/I(L)分为三组。只有一组公式(包括Fabre de la Ripelle的公式和Schreiber,Wims的公式)与所有实验数据符合得较好。 关键词：     

THE IBM EXPRESSIONS OF B(E2) FOR INTER REPRESENTATION TRASITIONS IN DEFORMED NUCLEI

The general one body E2 operator is used to derive the analytic expressions of B(E2) from the first β and γ bands to the ground band under the SU(3) basis.     

电光调QCO_2激光器的六温度模型理论与速率方程理论比较分析

分别利用速率方程理论和六温度模型理论对Q开关CO2 激光器动力学过程进行了理论分析比较 ,实验上测得电光调Q射频波导CO2 激光器脉冲激光建立时间及峰值功率与速率方程理论和六温度模型理论计算结果一致 .但速率方程理论计算的激光脉冲宽度较“窄” ,并且几乎没有拖尾 ,而六温度模型理论计算的脉冲激光波形有明显的拖尾 ,符合实际测量的波形 .另外 ,六温度模型理论可以全面反映激光器工作气体中不同分子能级的能量转移过程 ,因此六温度模型理论分析更全面     

FEATURES OF EQUIVALENT LOCAL POTENTIALS BETWEEN EXTREMELYLIGHT NUCLEI

The features of d-d and d-³H equivalent local potentials are studied by using single channel RGM and two-channel RGM, respectively. The results show that those equivalent potentials have energy and state dependences (containing odd-even l-dependence and s-dependence), which are useful in choosing the phenomenological optical model parameters of light nuclei.     

噪声和振动谱中线谱的提取和连续谱平滑

本文介绍一种在数字化功率谱上识别谱峰和平滑连续谱的算法。它适用于在噪声或振动谱上提取线谱特征和压缩数据量,是利用谱特征进行模式识别的有效预处理手段。这个算法的核心是在充分考虑谱的形状特点的基础上发展起来的谱峰识别逻辑。在一些实际应用中,这种方法已经取得了良好的效果。文章中给出了有关的应用实例。     

电子体系与光子体系

文章将电子与光子以及二者在不同的约束结构（孤立原子与光子点，孤立分子与光子分子，半导体晶体与光子晶体）中的行为作了类比，揭示电子体系和光子体系有很高的可比性。     

BETHE-SALPETER EQUATION FOR qq SYSTEM AND CALCULATION OF MESON SPECTRA

In this paper,an adequate form of qq Bethe-Salpeter (B-S) equation with one gluon exchange interaction and harmonic oscillator confining potential being taken into account has been derived,based on correct Gordon decompositions of the γ-matrices and a proper treatment for the fermion propagators in the equation.Furthermore,a Pauli-Schrodinger (P-S) equation including relativistic corrections has been established on the basis of the B-S equation by making use of relations between 4×1 components of the 16×1 B-S amplitude and a connection between the B-S amplitude and the P-S wave function both of which were found in the approximation of the order of p²/m².Calculations of meson spectra by employing the latter equation give a better agreement with the experimental data.     

原子-振子散射振转激发跃迁几率的理论计算

在相互作用表象中,利用角动量耦合理论,导出了原子-振子散射的含时量子计算公式,并计算了He-H₂体系的振转激发态-态跃迁几率和分散射截面。结果表明:(1)相互作用表象波函数在坐标空间中具有较高的定域性,随时间演化几乎不变形,因此在计算散射量时具有很高的精度,与标准的密耦合(CC)法的计算结果符合很好;(2)增加的振动部分对计算时间的影响取决于对一势能矩阵的积分,而在该积分中仅含基态的计算就能给出较为理想的散射截面,与CC法相比节省近一倍的计算时间。 关键词：