THE EFFECT OF-NUCLEAR DISTORTION IN DEEP INELASTIC SCATTERING

We have investigated the process of deep inelastic scattering by means of a phenomenological model which assumes that the colliding nuclei undergo quadrupole length distortion after sticking each other.The energy dissipations and the angular distributions and so on are in agreement with experimental data.The results may describe qualitatively the main characteristics of the quasi-fission.The total kinetic energy of the exit channel is the Coulomb repulsion energy of the fragments and the interaction time of the process is scaled by 10-22—10-21sec.In addition,the effect of 1 window of complete fusion is also given.     

THE BEHAVIOR OF PARTONS OF LARGE TRANSVERSE MOMENTUM IN DEEP INELASTIC SCATTERING

The nucleonic states are represented by different configuration components in Fock space and the transverse momentum of partons is introduced as a degree of freedom into the structure function. In this way We calculated the contribution of the components of the valent quarks and the non-valent quarks of the charm state to the ratio of the longitudinal and the transverse cross sections of the virtual photons. A better agreement with the experimental data is obtained. The causes of deviation of the Callan-Gross relation from the experimental data is pointed out.     

AN INVESTIGATION OF THE EFFECTS OF CHARGED BOSONIC PARTONS (DIQUARKS) IN e-P DEEP INELASTIC SCATTERING

We point out the possible existence of bosonic charged partons (diquarks) withinnucleons. A certain form of the structure functions of diquarks inside nucleons is as-sumed and the functions are suitably parametrized. Then, by combining their effectswith the usual QCD calculations, we get a better theoretical fit to the experimental R=(σ_L)/(σ_T) value in e-p deep inelastic scattering.     

DEEP INELASTIC SCATTERING PROCESSES OF THE ELECTRONS ON POLARIZED NUCLEONS AND POLARIZATION EFFECTS IN THE PROCESSES OF HEAVY LEPTONS PAIR PRODUCTION

By using the distribution functions of the valence stratons with definite helici-ties, the differential cross sections and asymmetries of 1. the deep inelastic scatteringprocesses of electrons on polarized protons, polarized neutrons and polarized nucleons,and 2. the process p+N→μ⁺μ^-+X (where the p and N are polarized) are comput-ed. From the kinematics, it is shown that no polarization effects exist in the process π(K) +N→μ⁺μ^- + X (where N is polarized). Also from the parton model it isshown that no polarized effects exist in the process P + N→μ⁺μ^- + X (where P and N are polarized).     

电子-质子的深度非弹性散射(Ⅱ)

本文应用戴逊表示来研究层子的一般图形,以考察不依赖击出图形是否也能得到无标度性。结果表明,只要流对易子矩阵元的戴逊表示中的谱函数在m²大时具有合适的行为,在ν大时就可以得到无标度性。至于q²的值,则并无限制。q²很小甚至趋于零都是允许的。此特点似与实验相符合。另外,对于一定的ν,结构张量W_μv只决定于谱函数在m²M_pν范围内的值,而与真正的m²→∞时的渐近行为并无关系。因此,目前所观测到的无标度性也许只是一定范围内的现象,当ν更大时,很可能会出现质的变化。     

电子-质子的深度非弹性散射(Ⅰ)

本文应用戴逊表示对层子击出图形进行更严格的研究,以考察:这种机制是否确能给出无标度性;如果能够,它是否要求层子质量很小,以及ν和q²取大值的具体标准是什么?结果表明,在ν足够大时,层子击出图形能给出无标度性,但最初结果与Bjorken的不同,这里得到的是W₁=νf₁(x),W₂=f₂(x)。只有借助于击出图形为主(对深度非弹性散射)的假定,应用规范条件,才能压低W₁和W₂而得到Bjorken无标度性。另外,无标度性的得出,只要求ν取大值(按照某些确定的标准),对q²并无限制。层子质量M亦不要求比核子小。理论上,对于任意的M值,只要ν足够大,都将得到无标度性。     

WARD IDENTITIES AND ELECTRON DEEP INELASTIC SCATTERING PROCESSES

Electron deep inelastic scattering processes are discussed using the method de-veloped in previous paper [1].General expressions of the irreducible diagrams ofthe structure functions are obtained.The relations between these irreducible diagramsand the kernels of the nucleon's B-S equations and the nucleon's transition matrixelements of the electric current are given by through Ward Identities.Neglectingthe contribution from the straton loop diagrams and using the potential assumptionfor the kernel of the equation,expressions of the structure functions and their calcu-lating method are given.The structure functions can be computed by using thekernel of the equations and solved wave functions.     

用高能核子非弹性散射研究核力有效势

本文用扭曲波玻恩近似法及多体高能近似法,处理了原子核对高能核子的非弹性散射现象。在具有可靠的靶核激发态波函数的情况下,可利用这些理论处理方法研究核内两核子间的有效势,本文具体就碳核对185MeV入射核子的非弹性散射进行了计算。在计算中利用了粒子-空穴模型核波函数。在采用了具有各种交换性质并包含自旋轨道耦合项的有效势后,用一组合理的位阱参数,由多体高能近似法计算的理论值可与几个微分截面及极化实验曲线同时符合。     

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：     

DIRECT SIMULATION OF DEEP INELASTIC SCATTERING OF HEAVY-IONS (I) ONE PARAMETER DISTRIBUTION

The distributions of dynamic variables in the deep inelastic scattering (DIS) of heavy-ions are studied by a direct simulation technique based on the single-nucleon-transfer-mechanism. The relative motion of the two collision partners is described by a Lagrange equation, and the transition probability of a single nucleon during the interaction time is calculated by the statisti-cal spectroscopy method.The occurrence of the transition event and the corresponding change of the dynamic variables are both treated randomly according to the transition probability. The calculated results for the reaction of ⁴⁰Ar+⁵⁸Ni(E_L=280MeV) are compared with experimental data.     

STUDY OF THE DEEP INELASTIC SCATTERING OF 12C ON 27AI

The deep inelastic scattering of 71.5 ¹²C ions on a ²⁷Al target was measured.ΔE-E telescope was used to identify the reaction products.The contour plots in the E-θ plane for the measured cross sections in the C.M.S.for B and Be show the generalfeatures of quasi-elastic scattering at grazing angles and the deep inelastic scatteringridge extending from smaller angles and flattening at larger ones.Two special featuresmay be worthwhile to mention.First,there are some fine structures near the Q.E.peak.Secondly,the average C.M.kinetic energy of the completely damped part is notequal to the Coulomb energy of the final state.     

THE CONTRIBUTION OF THE NUCLEON EXCHANGE TO THE TRANSFER OF IN DEEP ANGULAR MOMENTUM AND ENERGY INELASTIC COLLISION

The nucleon exchange can be divided into two different modes, the equal one and unequal one. Assuming that the motion of nucleon is random and according to Einstein relation the number of equal and unequal exchange is discussed. The total energy loss and the angular momentum for the reaction Kr+Kr have been calculated. The results. show that the total energy loss is only partly induced by nucleon exchange, while the. angular momentum dissipation is mainly induced by nucleon exchange and the equal exchange is more important than unequal one in both cases.     

THE INFLUENCE OF THE ZERO POINT OSCILLATION ON THE CHARGE TRANSFER IN THE HEAVYION DEEP INELASTIC COLLISIONS

We discuss the variance of the charge distribution in the heavy ion deep inelasticcollision on the basis of the Langevin equation. In order to explain the difference ofthe initial slope (early stage) of the charge distribution for the different reactionsystems and different bombarding energy, an initial condition of the charge drift inthe early stage of Dic is introduced. It is given by the harmonic or inhamonic motionaround the zero point and closely depends on the nuclear structure and incident energy.The difference of the inertial mass and stiffness parameter may be the one of thereason for the difference of charge transfer. In addition we also analyse the charac-terstic of the inertial mass parameter.     

晶体电子在外场作用下的Bloch振荡和散射对电流的影响

通过对晶体周期势场中电子在直流外场作用下的Ｂｉｏｃｈ振荡的分析，指出晶体在外场作用下的电流是由于电子受到散射的结果；没有散射作用，电子在外场作用下的运动为Ｂｌｏｃｈ振荡，不产生电流。     

低能电子非弹性散射阻止本领

电子在固体中的弹性散射用Mot截面描述,提出一个简化的壳层电子激发计算方法将文献[5]中对电子非弹性散射的模拟拓展到重元素,用MonteCarlo方法模拟低能电子在Al、Cu、Au中的散射过程,计算的背散射系数、薄膜透射系数与实验一致.由此,计算得低能电子非弹性散射阻止本领并与Love、Rao-SahibWittry以及Joy的修正Bethe阻止本领作比较分析.     

NUCLEUS-NUCLEUS INELASTIC SCATTERING AND THE INFLUENCE OF PROJECTILE NUCLEI STRUCTURE AT HIGH ENERGIES

On the base of Glauber's theory, nuclei-nuclei inelastic scattering amplitudes are given by using the rigid projectile approximation. Inelastic scattering differential cross sections of α+C¹² at 1.37GeV with 2⁺(4.43MeV) and 3^－(9.64MeV) of C¹² in the final state are calculated. The influence of the different density distributions of the projectile nuclei on nuclei-nuclei inelastic scattering is discussed.     

INFLUENCE OF SHELL STRUCTURE ON DEEP INELASTIC COLLISIONS

A kinematically complete study of the symmetric systems ¹⁵⁴Sm+¹⁵⁴Sm and ¹⁴⁴Sm+¹⁴⁴Sm has been performed at energies 30% in excess of the interaction barrier. They have been chosen because of their different internal structure: ¹⁴⁴Sm has a closed N=82 neutron shell and hence a spherical ground state confighration; ¹⁵⁴Sm with ten neutrons outside this shell is strongly deformed. Over the whole range of kinetic energy loss the variances of the measured mass distributions were found to be similar in both reactions, whereas the variances of the element distributions are considerably larger at small energy losses in the ¹⁴⁴Sm system. Based on the shell-corrected potential energy surface these observations are attributed to the closed N=82 neutron shell which, for ¹⁴⁴Sm, hinders the neutron exchange and leads to a preferential transfer of protons.     

激发态受激喇曼散射的半经典处理

本文讨论了光场与 V 型三能级系统近共振相互作用的半经典模型,由此求出了近共振激发时激发态的粒子数分布及由此产生的激发态受激喇曼散射(ESSRS)的增益,并研究了弛予,光强及失谐等因素对增益的影响,理论得出的结果与在钠原子中观察到的实验结果有较好的一致。     

高能质子在原子核上散射的自旋打翻效应

近几年来,由于有了较好的中能加速器和精细的探测技术,做出了一些实验,向人们展示了高能粒子在原子核上散射的一些有趣的新现象。     

散射幅的渐近行为和高能非弹性作用

假设当t<0时,真空Regge极点变为一对共轭复数,计算了高能道么正积分的弹性部分,结果亦得到应有一系列的支点。弹性积分不可能得到相应其他Regge极点的渐近项。把Regge表示推广应用到非弹性过程,得到有限粒子束的产生截面随(Ins)^-3下降。要使总截面趋于常数,则束数应达到Ins的数量级。