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1999年  第16卷  第2期

核物理
新核素合成、高激发热核和放射性束物理前沿再获一批重要成果
罗亦孝
1999, 16(2): 69-79. doi: 10.11804/NuclPhysRev.16.02.069
摘要:
综述了中国科学院近代物理研究所最近三年来在新核素合成、高激发热核和放射性束物理前沿领域取得的重要进展.其主要成果是在兰州重离子加速器和放射性束流线上获得的.The recent remarkable achievements in IMP in the research frontiers of synthesis of new nuclides, highly excited hot nuclei and radioactive ion beam physics are reviewed. Most of the achievements are made at the HIRFL and RIBLL of IMP.
中、重质量区新核素的合成
杨维凡, 袁双贵
1999, 16(2): 80-85. doi: 10.11804/NuclPhysRev.16.02.080
摘要:
论述了远离稳定线核素合成的科学意义,总结了有关新核素合成研究的国内外概况以及中、重质量区远离稳定线核素的主要产生机制.给出了我国合成的一些新核素的半衰期,并与理论预言值进行了比较.简略地叙述了核反应产物的传输、分离以及新核素的鉴别方法.The importance of synthesis of new nuclei far from stability is concisely recounted. The prograsses on synthesis of the new nuclides and the main methods used for producing new nuclei far from stability in the intermediate and heavy mass region is summarized. The half lives of some new nuclides synthesized in china are compared with those calculated based on the gross theory and the microscopic theory. Some examples for transport and chemical separation of the nuclear reaction products...
一个奇异核反应总截面的探测系统及其应用
蔡翔舟, 冯军, 沈文庆, 方德清, 王建松, 马余刚, 诸永泰, 李松林, 苟全补, 吴和宇, 靳根明, 詹文龙, 郭忠言, 肖国青
1999, 16(2): 86-90. doi: 10.11804/NuclPhysRev.16.02.086
摘要:
评述了现有的奇异核反应总截面测量方法,介绍了一套简单可行的测量中能区奇异核反应总截面的探测装置,并对实验的能量刻度、粒子鉴别以及实验结果进行了阐述和讨论. The present status of experimental studies of the total reaction cross sections of exotic nuclei are reviewed. A detector system used for measuring the total reaction cross section of radioactive ions is described. The energy calibration of detectors, particle identification and possible experimental results are discussed.
含三体势的IBM1的O(6)极限对偶偶120~130Xe和124~130Ba核的Yrast带回弯研究
刘英太, 韩勇, 徐延冰, 廖继志
1999, 16(2): 91-94. doi: 10.11804/NuclPhysRev.16.02.091
摘要:
应用含三体势的IBM1的O(6)极限[O(6)+V3]对过渡区偶偶核123~130Xe、124~130Ba的Yrast带能谱和回弯现象进行了分析研究.结果表明:O(6)+V3能较好地描述回弯的主要特征.The Yrast band energy spectra of even even nuclei 120~130 Xe and 124~130 Ba are calculated by using the O (6) limit of IBM1 containing three body potential. It shows that the backbending characteristics in the Yrast bands can be described fairly by O (6)+ V 3 .
氘-氘两体紧束缚态模型
张兆群, 张中良
1999, 16(2): 95-98. doi: 10.11804/NuclPhysRev.16.02.095
摘要:
提出了氘-氘紧束缚态模型.对两个氘原子核组成的体系,采用库仑势垒与核力方势阱组合的相互作用势,求解定态薛定谔方程,得到了两体紧束缚态的波函数和可能的能量本征值(核的库仑能数量级),并说明了这种紧束缚态的存在条件. Deuterion deuterion tight bound states model about the mechanism of so called “nuclear cold fusion” is proposed. To solve the stationary Schrodinger equation with combination potential which contains Coulomb barrier and square well potential from nuclear force for the system containing two deuterions, the wave functions, the energy eigenvalues of the probable tight bound states and the existence condition of the tight bound states are obtained. In the case of ground...
交叉学科
放射性束在固体物理和材料科学中的应用
朱智勇, 金运范
1999, 16(2): 99-103. doi: 10.11804/NuclPhysRev.16.02.099
摘要:
回顾了放射性核素在固体物理和材料科学中的应用,并对高能放射性束流的应用前景作了展望.The application of radioactive isotopes to solid state physics and material science is reviewed and the perspectives with high energy radioactive ion beams are discussed.
电子碰撞Li~+(ls)电离的三重微分截面
贾祥富, 粱景辉, 潘念东
1999, 16(2): 104-109. doi: 10.11804/NuclPhysRev.16.02.104
摘要:
利用修正的BBK理论,考虑入射道的库仑相互作用及出射道电子的交换对称性,在共面-等能分享-垂直角度碰撞几何中,计算了能量分别为85.6、105.6、227.6和375.6eV的入射电子碰撞Li+(ls)电离的三重微分截面.讨论了干涉效应、关联效应及入射道库仑场对截面的影响.Based on revised BBK theory, triple differential cross sections (TDCS) have been calculated for ionization of Li + (ls) by electron impact. A coplaner, equal energy, fixed re1ative angle kinematics are chosen and the particular case where the scattered and ionized electrons emerge perpendicular to each other is emphasized. The incoming electron state is considered by a Coulomb wave from the long range...
电子束脱除SO2和NOx的概述
刘振灏, 陈思富, 郑威, 张应发
1999, 16(2): 110-113. doi: 10.11804/NuclPhysRev.16.02.110
摘要:
综述了电子束脱硫脱氮的原理、特点和发展.中国成都电厂的电子束脱硫脱氮装置的运行,标志着我国工业应用阶段的开始.Removal SO 2 and NO x by electron beam is reviewed. Its basic procedure is described. The electron beam method has many advantages compared to chemical one. The first industrial facility in China has been built in Chengdu Electric Power Plant and it is ruming successfully.
磁性多层膜的穆斯堡尔谱研究
黄志高
1999, 16(2): 114-120. doi: 10.11804/NuclPhysRev.16.02.114
摘要:
评述了磁性多层膜中磁层、界面和非磁层的结构及磁性的穆斯堡尔谱研究的新进展,并展望了今后的研究方向.A new progress in Mssbauer study on the magnetic structure and magnetic properites of the magnetic layer, interface layer and nonmagnetic layer in the magnetic multilayers is reviewed.Further research trend is also discussed.
核能与核数据库
对先进核能系统中U-Pu循环的研究
沈姚崧, 刘成安
1999, 16(2): 121-125. doi: 10.11804/NuclPhysRev.16.02.121
摘要:
利用新开发的数据库和程序对加速器驱动的次临界反应堆中的U-Pu循环进行了详细的理论研究.通过对反应堆功率、临界系数、γ和中子通量以及裂变核的演化等计算,得到了令人满意的中子学结果.The U-Pu cycle in accelerator driven subcritical reactor is studied by means of new data library and code. The satisfactory neutronics results are obtained by calculating the reactor power, critical value, gamma and neutron flux and evolution of fissioning nuclear density. The detailed analysis is also presented.
压水堆燃料的检测、修复和重组
邓浚献, 赵希卷, 叶晓丽, 赵红, 张恩海, 高衍刚, 刘应林
1999, 16(2): 126-130. doi: 10.11804/NuclPhysRev.16.02.126
摘要:
概要说明了压水堆辐照燃料的检测、修复和重组工作的原理和工序,啜吸技术的原理和发展.最后着重描述了在线啜吸检测装置的研制. The principle and procedure of inspection, reparation and reconstitution of PWR irradiated fuel and the principle and development of sipping technique are briefly introduced. A sipping device on line designed by ourself is described.
快报
208Hg β衰变新γ射线的初步观察
张立, 赵进华, 胡青元, 李占奎, 李世红, 甘再国, 范红梅, 郭斌, 张天梅, 于涌, 王春芳, 王同庆, 靳根明
1999, 16(2): 131-132. doi: 10.11804/NuclPhysRev.16.02.131
摘要:
利用8.4MeV/u的18O束轰击天然铅靶,分离出汞元素产物,并以此研究208Hgβ衰变的新γ射线.除已报道的γ射线以外,观察到对应于208Tl已知能级间跃迁的9条新γ射线.The Hg products produced in the bombardment of natural lead targets by 18 O beam of 8.4 MeV/u were separated by means of an off line gas thermochromategraphic device. The coincident gamma spectra and time successive single γ ray spectra were measured. Except the already known γ rays, nine new γ rays assigned to the transitions between the known levels of 208 Tl were observed.