高能物理学发展的回顾和展望

 从电弱统一理论提出到现在已经过去了23年.量子色动力学从诞生到现在也已经历了17年,在这期间CERN建成了E_cm=60GeV的质子对撞机ISR;FNAL和CERN分别建成了能量为500GeV和450GeV的质子同步加速器.     

国外基础物理教学改革及教材的剖析（二）

1990年10月我曾以上述题材介绍了国际会议的动向、美国IUPP的概况、UNESCO大学基础物理改革计划、Halliday-Resnick的的基础物理学(扩展本第三版)等(刊载于《工科物理》1991.4)。现在已事隔三年，国际上基础物理教学改革的情况又如何?从下述一些情况，就可以看出全世界从事物理及物理教学工作的学、教授都十分关注这一问题。     

Momentum Transfer Dependence of Two Types of the Broad Enhancement Phenomena： CO Spectra in the Valence Energy Region

Partial generalized oscillator strength densities of CO molecules related to the excitation of a 5σ or 1π electron are calculated by using multi-scattering self-consistent-field methods.Momentum transfer dependence of two types of the broad enhancement phenomena above the threshold with one-electron character,i.e. shape resonance and non-resonance enhancement,is studied.Our calculations show that the energy position of a non-resonance enhancement is related to the momentum transfer K.Therefore,electron impact based experiments can be used to identify the two types of the broad enhancement phenomena.     

从物理看乐音的和谐(续)--物理与音乐专题之一

研究表明，人类的耳朵除了对基频外，较易听辨的就是二倍(频率)音、三倍音和四倍音．所以当一个基频为f1：f2：f3=400：500：600的三个音同时发声时，各音的二次谐频，三次谐频，四次谐频被加强，听感就变得和谐、明亮．而频率比不是简单整数比关     

Construction of the HL-2A Tokamak

HL-2A is the first tokamak with divertor in China. The objectives of HL-2A are to produce more adaptable divertor configurations to study energy exhaust and impurity control, and to study enhanced core plasma confinement by profile control and moderate plasma shaping. HL-2A has well optimized operational flexibility and excellent accessi-bility for the diagnostic systems to facilitate various plasma experiments.     

Is Kano-Nucleon Interaction Consistent with Pentaquark θ^＋

The quark-delocalization colour-screening model is employed to calculate the effective potential between nucleon and kaon. The results show that the potentials are attractive in the I = 0 channel and repulsive in the I = 1 channel. The interactions are very weak between K^＋n or K^0p due to the cancellation between I = 0 and I = 1. It is possible to have a high s-wave resonance （1615 MeV）, but the width may be too wide to be observed in the experiments.     

Dynamic Mechanism of Sustainable Molecular Orientation Generated From Cyclic Rotational States

Recently, two papers presented by Ortigoso et al. [Phys. Rev. Lett. 93 （2004） 073001 and Phys. Rev. A 72 （2005） 053401] develop a novel strategy in which the best sustainable molecular alignment/orientation has been achieved. We intend to analyse the dynamic mechanisms, including those Ortigoso et al. have not clarified.     

美好的成长时光

2006年8月16日是于敏先生八十寿辰，作为他的第一代学生，我们想借祝贺他的寿辰的机会，浮想40年前的往事，追忆我们在于敏先生指导下工作的10年，以表达我们对他的敬意。