1998年 第15卷 第2期
简要评述当前几种主要的中能重离子碰撞动力学理论优缺点的基础上，介绍本小组初步建立起来的两体关联输运理论以及中能重离子碰撞中同位旋相关输运理论的进展情况． Based on the analyses of successes and shortcomings of Boltzmanntype models and quantum molecular dynamics for heavy ion collisions, the new progress of twobody correlation transport theory and isospindependent transport models for heavy ion collision are proposed.
综述了重离子耗散碰撞激发函数中截面涨落现象的实验与理论研究的现状． The present status of the studies on the cross section fluctuation phynomeno in dissipative heavy ion collisions (DHIC) is reviewed, especially for the fluctuation characteristics and the theoretical deuelopment.
利用与延发质子符合的子核中已知的第一个２＋→０＋（基态）的γ跃迁来鉴别其β延发质子先驱核的方法已在实验中得到证实，并在兰州重离子加速器ＳＦＣ上用氦喷嘴快速带传输系统成功地合成与研究了沿Ｚ＝０．７４３Ｎ＋１１．６质子滴线分布的稀土区新β延发质子先驱核１３５Ｇｄ和１２１Ｃｅ．该鉴别方法在缺中子稀土区新核素合成中将具有很大的应用前景． It′s more and more difficult to synthesis and study new nuclei along the proton dripline by using online isotope separator because of its low efficiency. A specific method of “pγ” coincidence measurement, using the known lowlying “2+→0+(ground state)” γ transition of the “daughter” nucleus in coincidence with its βdelayed proton, could increase the detection sensitivity ...
核爆炸后产物放射性和毒性及其随时间的变化是有关安全保障和环境保护的主要问题．利用新开发的数据库和程序对该问题进行了详细的理论研究，给出了裂变产物的放射性活度、生物潜在危害因子和能量沉积等量的演化情况，列出了主要放射性核的贡献，还分析了由于诱导反应在土壤和岩石中产生的放射性同位素的变化. The evolution of radioactivity and poisonousness of the products after nuclear explosion is very important for safety and environmental protection. The detailed study of the evolution of radioactivity of fission products, biological hazard potential, energy deposition and so on was performed by using the new data base and code. The contributions of the main radioactive nuclei and the evolution of radioisotopes in soil and rock are also discussed.
综述了稳定同位素在药物动力学研究中的最新发展，随着质谱和色－质联用等仪器的普及，它将成为药物研究中的一种重要手段． The recent progress of the Stable Isotopes(SI) research on pharmacokinetics is reviewed. With development of MS and GCMS, it will be an important method for studying drugs.
简述了加速器驱动洁净核能靶系统的研究现状和存在的问题，对进一步可开展的工作提出了建议． The present status of the study on the neutron production rate, the neutron energy spectrum and the radiative nuclear production from the target spallation in accelerator driven clean nuclear system is presented. The Monto Carlo simulation and the related physics are also discussed. Their further improvement and the suggestions for the work to be done in China are proposed.
用四个快中子基准实验检验了ＥＮＤＦ／Ｂ－ＶＩ、ＪＥＮＤＬ－３和ＣＥＮＤＬ－２三个评价核数据库中的２３５Ｕ和２３８Ｕ等数据．计算结果指出，ＥＮＤＦ／Ｂ－ＶＩ库的数据对快中子积分实验的预言更准确． Four fast benchmark experiments have been used to the data of 235,238U in testEndf/B-VI,JENDL-3 and CENDL-2 nuclear date libraries...
报道了新重丰中子汞同位素２０９Ｈｇ的首次观察．The new neutronrich mercury isotope 209Hg has been identified from the separated mercury products producted in 600 MeV 18O+natPb (thick target) reaction. An online, gasthermochromatographic technique and a special detection method were used. Four γ rays following the 209Hg decay were assigned. The halflife of 209Hg was determined to be 35+9-6 s.