ELASTIC SCATTERING OF NEAR 1GeV PROTON FROM MEDIUM AND HEAVY NUCLEI

The differential cross sections of the elastic scattering of near 1GeV proton on ^40,42,44,48Ca, ⁴⁸T, ^58,60,62,64Ni, ⁹⁰Zr and ²⁰⁸Pb are calculated by use of the method of the collective coordinate and high energy cluster scattering theory for the Wood-Saxon potential. The results are found to be in a good agreement with experimental data.     

6.8MeV质子对Cr,Co,Ni,Cu,Zn的弹性散射

本实验测量了6.8MeV质子对Cr,Co,Ni,Cu和Zn的弹性散射角分布。在其微分截面σ_e(θ)与库仑散射微分截面σ_R(θ)之比对θ的作图中显示:这几种元素A相近,也有大体相似的角分布曲线;其极大极小位置可以用kR′sinθ_m/2=常数表之,显示出核的粗糙结构的特征。但在大角度处,这几种质量数A相近的核,其(σ_e(θ))/(σ_R(θ))值却有显著的差异,而且偶z核的(σ_e(     

ELASTIC SCATTERING AND POLARIZATION OF HIGH ENERGY PROTON FROM 4He

Using Glauber theory including the nucleon spin effects,the proton-⁴He elastic scattering differential cross section and polarization at energies in the region 0.35—23.1 GeV are calculated.The results show that,after including the spin-flip terms,we can explain the differential cross section data and describe qualitatively the polarization.     

有缺陷铁磁体的中子非弹性散射

本文对有缺陷铁磁体的中子-自旋波散射作了理论研究。计算了在简单情况下的非弹性散射的微分截面。通过慢中子的散射实验可能证实自旋波局域模的存在。我们在文中得出了散射态波函数,并证明了它们与局域模波函数一起在自旋偏离为一的子空间中组成了正交归一完整的波函数系。 关键词：     

ELASTIC SCATTERING OF HADRONS FROM NUCLEI AT HIGH ENERGY AND THE SHORT RANGE CORRELATION IN NUCLEI

The effects of short range correlation in nuclei on elastic scattering of hadronsfrom nuclei at high energy are studied by means of Glauber multiple diffraction the-ory, using Jastrow correlated wave functions. To this end, a determinant form ofJastrow correlated wave functions is used. Calculations have been carried out for π^--¹²C elastic scattering at 260 MeV, and they are compared with the experimentdata. The results show that the influence of the short range correlation on the dif-ferent cross section is quite important.     

锌的X射线热漫散衍射及弹性系数

提出使用逐步逼近方法进行X射线热漫散衍射强度的水平与垂直发散修正。从测量的热漫散衍射强度经过各种修正之后,得到锌的弹性系数与超声方法得到的结果相符,分别为(以10¹²达因/厘米²为单位):c₁₁=1.6₉,c₁₂=0.39₄,c₁₃=0.54₉,c₃₃=0.68₂,c₄₄=0.42₉,c₆₆=(1/2c₁₁-1/2c₁₂=0.64₈。     

分形粗糙面双站散射的快速前后向迭代法数值模拟

为模拟复杂分形表面特别是在低掠角入射条件下的双站散射,发展了一种结合前后向迭代方法(FBM)与谱加速算法(SAA)快速求解散射场的Monte Carlo数值方法,计算了在TE,TM锥形波入射在一维分形导体粗糙面的双站散射以及有规则异物存在时的双站散射,讨论了分形粗糙面双站散射的角度性分布与其分数维的关系. 关键词： GFBM/SAA 分形粗糙面 双站散射     

NEUTRINO-PROTON,NEUTRINO-ELECTRON ELASTIC SCATTERING AND THE SPACE-TIME STRUCTURE OF THE WEAK NEUTRAL CURRENTS

A general phenomenological analysis of vp、vp、ve、and ve elastic scattering is presented and the polarization effects of the targets and final recoil particles are also considered. The space-time structure of the weak neutral currents is examined systematically. Under some paticular conditions, the criteria for the existence of various couplings are given.     

LBO晶体的布里渊散射与弹性和压电系数的测量

简述了应用布里渊散射测量晶体的弹性和压电系数的方法,推导了C_2v点群晶体(100),(010)和(001)晶面内任意波矢方向的布里渊散射张量及声速各向异性方程.根据上述方法及结果,用180°散射测量了LBO晶体不同波矢方向的布里渊散射谱,得到了LBO晶体在特超声频率下所有独立的弹性和压电系数,并依此计算了该晶体的声速各向异性曲线. 关键词：     

STUDY OF ≡-P ELASTIC SCATTERING

The recently measured differential, elastic and total cross section for ≡^-P elastic scattering at 102 and 135 GeV/c have been fitted by using simple Regge pole model with phenomenological residue fmctions.     

Debye-Hückel方程描写的离子导体对光、中子和电子束的准弹性散射

本文计算了在没有外电场和外加静电场情况下,能以Debye-Hückel方程描写其电荷输运的系统对光束、中子束和电子束的散射。所引起的是准弹性散射(瑞利散射)。在没有外电场情况下,瑞利散射的谱分布是两个峰宽不同而位置重迭的中心峰,且峰形不对称;外加静电场将引起瑞利峰宽度和位置的变动。本文并讨论了观察上述现象的可能性。     

高能质子与原子核的弹性和非弹性散射

近年来,高能粒子与原子核的相互作用在实验与理论方面都做了一些工作。高能粒子由于波长短,能够深入核的内部,因此,从反应机制到核结构等问题引起人们广泛的兴趣。近一、二年由于实验方面分辨率的提高,能够分辨出低激发态的非弹性散射道,并且开始做出一些实验。这些实验对进一步研究散射的机制、核结构的影响都是很重要的。     

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     

自旋极化电子与Xe原子的弹性碰撞

在电子与无自旋原子的弹性过程中,可认为电子是在一个向心的有效势V(r)中作相对论运动。由Slater定域近似下的相对论自洽场方法(SCF)求得该有效势。在求得有效势的基础上,采用相对论分波法,计算了极化电子与无自旋原子弹性碰撞的散射振幅,进而计算了微分截面和散射电子自旋极化参量。通过与有关的完全实验比较,明确了本文所采用理论方法的适用范围,即在E≥100eV的能量范围内,本文所用理论方法可较好地描述极化电子与无自旋原子的弹性碰撞过程。 关键词：     

Bi2201体系中Raman散射、微结构和输运性质研究

利用Ｘ－光衍射,电子衍射,Ｒａｍａｎ散射和电阻率等手段对多晶样品Ｂｉ１．８Ｐｂ０．２Ｓｒ２Ｃｕ１－ｘＦｅｘＯｙ,Ｂｉ１．８Ｐｂ０．２Ｓｒ１．６＋ｘＬａ０．４－ｘＣｕ１－ｘＦｅｘＯｙ的结构和性能进行了研究。结果表明：Ｂｉ２２０１体系的调制特征与客外氧的多少无关,６２５ｃｍ＾－１附近的Ｒａｍａｎ峰受‘电荷转移’效应和调制结构变化的显著影响,晶体的微结构变化强烈影响体系的超电性和输运性质。     

RELATIVISTIC DESCRIPTION OF PROTON-NUCLEUS ELASTIC SCATTERING AT HIGH ENERGIES

In the framework of relativistic Dirac's equation, a fermion elastic scattering from a nucleus has been discussed. The cross sections, analyzing power and spinrotation parameters for 500MeV proton scattered from He⁴,Ca^40,48 and Pb²⁰⁸ have been calculated in the eikonal approximation. The agreement between theoretical and experimental results is satifactory.     

U238自发裂变瞬时中子数目几率分布

用载镉(Cd)液体闪烁探测器测量了U²³⁸自发裂变瞬时中子数目几率分布P_v。实验得出P_v分布的宽度为σ_v=0.90±0.09,比其他重偶-偶核(Pu,Cm,Cf和Fm)相应的宽度来得窄,同时测得v=1.96±0.05,与以前的结果在误差范围内一致。     

RELATIVISTIC STUDY OF PROTON-NUCLEUS ELASTIC SCATTERING AT LOWER ENERGIES

The Lorentz invariant relativistic optical potential have been discussed at energies below 300MeV.The Dirac equation with scalar and vector potential is solved by exact partial wave method.The calculated results of proton ⁴⁰Ca at energy region 300—65MeV are presented and compared with the experimental data of differential cross section dσ/dΩ,analyzing power A_y(θ) and spin rotation function Q(θ).It is shown that the impoved relativistic optical potential fits the data well.     

INELASTIC SCATTERING OF THERMAL NEUTRONS BY METAL HYDRIDES ZrH1.66 AND TiH1.92

Inelastic scattered neutron spectra of metal hydrides ZrH_1.66 and TiH_1.92 have been measured by beryllium filter detector spectrometer and their phonon spectra have been deduced from the neutron spectra according to the A. Sjölander formula by iterative method. The optical branches of the two samples thus obtained are approximately Gaussian distributions and their positions are in agreement with other works, while their PWHM are smaller than the value uncorrected for multiphonons effect reported elsewhere. Their acoustic branches obtained are of neither Debye nor Gaussian type but show a double-numped configurations. Some new configurations have been observed between the optical and acoustic branches which may be attributed to localized modes as a result of disorder.     

DIPOLE POMERON MODEL AND RECENT RESULTS ON PP ELASTIC SCATTERING

The dipole pomeron model has been used t of it the recent differential cross section data for pp elastics cattering.