1998年 第15卷 第1期
简单介绍了干涉学的发展历史，综述了利用粒子关联（干涉）测量高激发核衰变中轻粒子和中等质量碎片的发射时标、发射次序以及核温度的实验结果．这些结果表明，热核由相继衰变逐渐向多重碎裂的过渡． A brief introduction of interference development has been made.The experimental results of the time scale, emission order and temperature of light charged particles and intermediate mass fragments emitted from hot nuclear systems have been reviewed. These results indicate the transition from sequential decay to multifragmentation for hot nuclear decay.
分析了Ａ＞１７０质量区丰中子核素的产生、分离和鉴别过程，总结了在这一质量区用较轻中能重离子炮弹打重靶产生新核素的优点．提出了在在线同位素分离器上使用带有优良元素选择性的激光离子源和多层靶加气体传输系统的改进措施． The production, and process of separation and identification of new neutronrich nuclei with mass number A>170 were analyzed. The advantages of producing new isotopes in this mass region by lighter heavy particles on heavy targets were summarized. It is put forward an improvement method that a laser ion source and multilayer target combining with gas jet transport method can be used on online isotope separator.
评述了高能重离子碰撞中多粒子产生的热力学模型，并根据该模型的最新发展，研究了有关高能核－核碰撞中簇射粒子的赝快度分布问题． The thermodynamic models for multiparticle production in high energy heavyion collisions are reviewed.According to the recent developments of the thermodynamic models,the pseudorapidity distributions of shower particles produced in high energy nucleusnucleus collions are investigated.
利用Ｂｅｒａｋｄａｒ和Ｂｒｉｇｇｓ对ＢＢＫ波函数Ｓｏｍｍｅｒｆｅｌｄ参数的修正结果（即考虑第三个粒子存在对两个粒子间相互作用的影响），并考虑了入射道的库仑相互作用及出射电子的交换对称性，计算了在共面－等能分享－固定相对角度几何情况下，入射能量分别为：５８．４、６８、８１．６、１０８．８和１７４．４ｅＶ的Ｈｅ＋（ｅ，２ｅ）反应三重微分截面．结果表明，在较低碰撞能量散射中，入射道库仑场对两体碰撞起主要作用． A corrrelated threebody continuum wavefunction proposed by Brauner et al has been recently modified further to allow for threebody effects by introducing Somerfeld parameters (Berakdar and Briggs). The triple differential cross sections for electron impact ionization of He+ in coplanar equalenergy sharing and fixedrelative angle geometry are calculated. The initial channel wavefunction involves a Coulomb wavefunction due to the long range Coulomb attraction between the incident...
对ＨＩＲＦＬ（兰州重离子研究装置）的几个主要参数的稳定性对束流指标及运行效率的影响进行了分析，如高频的幅度稳定和相位稳定及主磁场的稳定等，并提出了合理的稳定度要求和需要采取的措施． The stability of the main parameters at HIRFL accelerator complex, which is important to get high extraction efficiency of the beams from cyclotrons has been studied. The RF amplitude stability and the stability of main magnetic field are the key parameters. The reasonable requirements for the parameters at HIRFL and the measures to reach them are proposed.
自１９９５年以来，在中科院近物所２ＭＶ串列静电加速器上对溅射负离子源进行了调试．调试中对源体作了重大的改进，逐步完善了运行工艺，利用该离子源加速器可长时间提供Ｌｉ、Ｃ、Ｏ离子束.Since 1995, the sputter ion source has been tested on the 2 MV tandem accelerator in the Institute of Modern Physics. During the experiment some important improvememts on the source were performed. The running procedure has been progressively perfect. With this vaurce, the stable Li, C,O ion beams can be delivered by the accelerator for long period.
发展了一个与距离相关的紧密结合分子动力学模型来系统研究钠原子团簇Ｎａｎ的结构、热力学和碰撞动力学性质．计算结果能够很好地符合从头计算法（ａｂｉｎｉｔｉｏｎ）的计算结果和实验结果．同时也探讨了这种有限数目团簇随温度升高可能发生的从类固相到类液相的相变和在碰撞过程中形成双团簇（Ｎａｎ）２的动力学稳定性． Based on the tightbinding molecular dynamics, the structural, thermodynamical and collision properties are systematically studied for Nan. Present claculations are successful in reproducing some of the experimental data and in agreement very well with some other ab initio calculations. We also investigate the transition from solidlike phase to liquidlike phase with increasing temperature for this finite system and the stability of dimer (Nan)2 formed in cluster collisions.
影响多元材料溅射的机制是复杂的．在多元材料溅射中，同位素溅射是最简单的．虽然仅有质量效应在同位素溅射中起优势作用，但是在离子轰击溅射中，至今仍然是个“同位素迷惑”．争论的焦点有：（１）在零剂量时，同位素富集度是与出射角无关，还是与出射角有关？（２）同位素角效应是一次溅射效应，还是二次溅射效应？如何理解碰撞级联中的动量不对称性对同位素溅射的作用？文中综述了这些争论，并阐明了本小组的观点． Mechanisms affecting multicomponent material sputtering are complex. Isotope sputtering is the simplest in the multicomponent materials sputtering. Although only mass effect plays a dominant role in the isotope sputtering, there is still an isotope puzzle in suputtering by ion bombardment. The major arguments are as follows:(1) At the zero fluence, is the isotope enrichment ejectionangleindependent or ejectionangledependent? (2)Is the isotope angular effect the primary or the ...
综述了应用轻便γ测量技术在地矿及地下水寻找等方面的一些新应用，例如：在金矿勘探中指导坑道掘进，找到了被遗漏的矿体，发现了新的矿化类型；在地下水寻找中，确定了富水层位；在温泉开发中，探明了控制温泉出露的断裂带；在滑坡研究中，确定了古滑坡的具体位置． The new applications of γ survey are described in the fields of indicating underground advance, seeking out lossed ore deposit, discovering neotype deposit for detecting the gold deposit; determining productive aquifer for looking for groundwater; discovering fracturation zone controlling crop out of hot spring for developing the hot spring, and locating the position of ancient rock slide for prospecting the earth slide.
用正电子湮没寿命谱方法，对国内外几个主要厂家的加强型热收缩制品进行了对比测试，得到了一些有参考价值的结果． The positron lifetime technique has been used to study heatshrunk products of crosslinking PE which came from different factories. Same valuabled results are obtained.
综述了适用于惯性约束聚变（ＩＣＦ）实验的层析技术，并已用于“星光Ⅱ”装置激光等离子体的实验Ｘ光测量结果分析，重建出Ｘ光的三维分布，获得了有意义的结果，从而表明了该技术在ＩＣＦ实验中应用的可能性． A CT technique applied to ICF experiments has been studied and it has been used to analize the measured Xray in laserplasma experiments at “XingguangⅡ” device. The threedimensional distribution of the Xrays in targets is reconstructed and useful results are obtained. This shows that the CT technique can be applied to ICF experiments.