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1998 Vol. 15, No. 3

Nuclear Physics
Study on HF States and Spectra of Even Even Pd Nuclei
Xu Yan-bing, Liu Ying-tai, Liao Ji-zhi
1998, 15(3): 129-133. doi: 10.11804/NuclPhysRev.15.03.129
Abstract:
By using modified surface delta interaction, the deformed Hartree Fock calculations are performed for the six nuclei: 106 Pd, 108 Pd, 110 Pd, 112 Pd, 114 Pd and 116 Pd. The prolate, oblate and some particle hole excited configurations are obtained.The calculated results show that there is a form transition from mass number 106 to 116, and that single particle energy spectra are different not only for the nuclei with different mass...
Fusion around Coulomb Barrier with Halo or Weakly Bound Nuclei
Liu Zu-hua
1998, 15(3): 134-137. doi: 10.11804/NuclPhysRev.15.03.134
Abstract:
Study of fusion around coulomb barrier with halo nuclei are presently a vevy important topic, especially due to the debate about the influence of break up process in fusion. The theoretical debate and experimental status of halo nucleus fusion are reviewed. Fusion with weakly bound nuclei in stead of halo ones is discussed.
Conditional Moments in Hot Nuclear Multifragmentation and Signals of Liquid gas Phase Transition in Nuclear Matter
Liu Fu-hu
1998, 15(3): 138-143. doi: 10.11804/NuclPhysRev.15.03.138
Abstract:
The conditional moment correlations and distributions in hot nuclear multifragmentation are reviewed and investigated. The signals of liquid gas phase transition in nuclear matter are discussed.
Study of Integral Split Ring Radio Frequency Quadruple (ISR RFQ) Accelerators
Lu Yuan-rong, Li Wei-guo, Guo Ju-fang, Ren Xiao-tang, Yu Jing-xiang, Fang Jia-xun, Chen Chia-erh
1998, 15(3): 144-149. doi: 10.11804/NuclPhysRev.15.03.144
Abstract:
The status of the ISR RFQ accelerators in Peking University is described. The structure of ISR RFQ accelerator, beam dynamics calculation results by PARMTEQ, RF systems, beam transport lines and the beam test evolutions of a 26 MHz 300 keV ISR RFQ accelerator are also presented, respectively. The beam test results for N +, O +, O - particles are analyzed in detail. At last, the development of 1 MeV 26 MHz ISR RFQ accelerator is introduced briefly.
Cross Discipline
MeV Microcluster Beam Interaction with Matter
Lu Xi-ting, Shen Ding-yu, Wang Xue-mei, Zhao Qiang, Zhao Zi-qiang, Zheng Tao, Shen Yi, xiong, Xia Zong-huang#
1998, 15(3): 150-154. doi: 10.11804/NuclPhysRev.15.03.150
Abstract:
The recent development on investigation of MeV microcluster beam interaction with matter is outlined. And based on 5SDH 2 Pelletron of Peking University, some relative experimental results, such as identification and Rutherford backscattering measurement of MeV carbon cluster ions, stopping power of MeV silicon microcluster ions in Al film, damage producted in silicon by MeV silicon microcluster irradiation, etc. are briefly introduecd.
Progress of Research of Electron Transfer in Highly Charged Ion atom Collisions
Ma Xin-wen
1998, 15(3): 155-160. doi: 10.11804/NuclPhysRev.15.03.155
Abstract:
The progress of the research of electron transfer in highly charged ion atom collisions was briefly reviewed in two ways. The various experimental techniques were reviewed first, then the theoretical description of multiple electron transfer were discussed, and the successes and the problems existing in this field were also approched.
High Energy Heavy Ion Irradiation Effect in III V Compound Semiconductors
Chen Zhi-quan, Li Shi-qing, Wang Zhu, Hu Xin-wen, Wang Shao-jie, Hou Ming-dong
1998, 15(3): 161-165. doi: 10.11804/NuclPhysRev.15.03.161
Abstract:
Both GaAs and InP were irradiated by high energy (500 MeV) Ne ions. The Monte Carlo simulation, positron annihilation and IR spectroscopy were used to study the radiation induced defects. The result showed that monovacancies existed in as grown samples, but more monovacancies were introduced, after Ne ions irradiation, and with increasing radiation dose, divacancies were formed, and eventually large voids were observed. The IR measurement for irradiated GaAs samples confirmed the...
Study of Quantum Optoelectronic Material Prepared by Ion Implantation
Xie Er-qing, Wang Zhi-guang, Jin Yunfan
1998, 15(3): 166-169. doi: 10.11804/NuclPhysRev.15.03.166
Abstract:
The strong photoluminescence (PL) of Si nanocrystals origined from the quantum confined effect, the preparation of quantum optoelectronic material by ion implantation as well as the advantages if its application to optoelectronic devices are reviewed and discussed.
Nuclear Energy and Nuclear Data File
Study of Nuclear Chemistry Related to Nuclear Power System Driven by Accelerator
Li Wen-xin
1998, 15(3): 170-174. doi: 10.11804/NuclPhysRev.15.03.170
Abstract:
Some of research scopes on nuclear chemistry, concerning development of clean nuclear power system driven by accelerator have been proposed. The research fields proposed include spallation products and their yield distributions, transmutation of long lived radiowaste, neutron measurement and diagnosis by activation techniques. Advantages of (n, xn) reactions used for transmutation of radiowaste have been discussed.
Clean Nuclear Power Technology and Proposal of Application of High Intensity D Li Fast Neutron Source
Wang Tie-shan, Guo Jun-sheng
1998, 15(3): 175-180. doi: 10.11804/NuclPhysRev.15.03.175
Abstract:
The accelerator driven nuclear power technology, as one of the most important scientific projects in the world, is evaluated. Some of its applications on transmuting nuclear waste, producing fission energy and doing scientific researches are also discussed. A proposal of using high intensity D Li fast neutron source as driven source of a zero power accelerator driven fission facility is outlined for the principle research and multi application purposes based on the present scientific...
Progress on MCF and Spherical Torus
Cao Dong-xing
1998, 15(3): 181-185. doi: 10.11804/NuclPhysRev.15.03.181
Abstract:
Since Nov. 1991 JET, TFTR, JT 60U have contributed to valuable operating experience with D T reaction systems, and have validated abilities to design ITER. Two steps of ITER design (CDA, EDA) will be finished in July 1998. The whole design process of fusion power reactor has been considered in detail, including safety analysis and experimental valuations, but the high cost of construction becomes a main contradiction in futher developent. An advanced type of Tokamak spherical torus might...
Program System of Evaluated Nuclear Structure Data File and Its Relevant Database
Zhou Chun-mei, Huang Xiao-long
1998, 15(3): 186-190. doi: 10.11804/NuclPhysRev.15.03.186
Abstract:
The program system of evaluating nuclear structure data file and the relevant database are briefly introduced. The main functions of these program system and their derived database are also presented.
Letter
A New Heavy Neutron rich Isotope——238Th
Xu Yan-bing, Yuan Shuang-gui, Yang Wei-fan, He Jian-jun, Li Zong-wei, Ma Tao-tao, Xiong Bing, Qin Zhi, Mou Wan-tong, Gan Zai-guo, Shi Li-jun, Guo Tian-rui, Chen Zhan-tu, Guo Jun-sheng
1998, 15(3): 191-192. doi: 10.11804/NuclPhysRev.15.03.191
Abstract(1926) PDF (552KB)(550)
Abstract:
A new nuclide 238Th has been produced via multinucleon transfer reaction by 60 MeV/u 18 O ion irradiation of natural uranium. The produced thorium was radiochemically separated from the mixture of uranium and its reaction products. The activity of thorium was measured by using a HPGe detector and a planar HPGe detector. 238 Th has been identified for the first time by measuring the growth and decay of the γ rays from its daughter nucleus 238 Pa.