1999 Vol. 23, No. 11

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Review
A Very High Energy GLE Event Possibly Associated With the X Solar Flare of 15th June 1991
Peng Zhaoran, Li Jing, Ma Xinhua, Wang Wei, Zhu Qingqi, Shen Changquan, Jing Cailiu, Deng Yuju, Yuan Yukui, Huo Anxiang
1999, 23(11): 1033-1038.
Abstract:
Analysing the changes of cosmic ray counting rates obtained by the Hial-Rou EAS array in June of 1991, we find a very high energy GLE event after the X solar flare of 15 June 1991. The event started at 1100 UT of the day and lasted about 25 minutes. ...
Observation of Heavy Cluster Emission From Radioactive 230U Nuclei
Pan Qiangyan, Yuan Shuanggui, Yang Weifan, Li Zongwei, Ma Taotao, Guo Junsheng, Liu Mingyi, Liu Hongye, Xu Shuwei, Gan Zaiguo, Kong Dengming, Qiao Jimin, Luo Zihua, Zhang Mutian, Wang Shuhong
1999, 23(11): 1039-1043.
Abstract:
230Pa was produced with the reaction 232TH (p, 3n)230Pa in the irradiation powder targets of ThO2 with 35 MeV Proton beam. Sources of 230Pa -230U were prepared by radiochemical method. Using solid-state track registration detectors, two events of 230...
Identification of New Isotope 238Th
He Jianjun, Yang Weifan, Yuan Shuanggui, Ma Taotao, Li Zongwei, Xiong Bing, Xu Yanbing
1999, 23(11): 1044-1048.
Abstract:

Unreported heavy neutron-rich nuclide 238Th has been produced via a multinucleon transfer reaction by 60MeVIu 180 ions bombardment of natural uranium.Thorium was radiochemically separated from the mixture of uranium and reaction products. 238Pa as a ...

Upgrade on the Barrel Shower Counter at BES
Zhou Li, Que Youkun, Cui Xiangzong, Fang Jian, Gu Weixin, HanShiweng, Hu Haiming, Huang Guangshun, Li Peiqin, Li Xinhua, Liu Yan, Mao Zepu, Qi Nading, Qi Xiangrong, Sun Hansheng, Wang Linzhou, Xiong Weijun, Xue Shengtina, Xu Zhijing, Yu Chunxu, Zhang Yu, Zhao Haiwen, Zhao Zhengguo
1999, 23(11): 1049-1053.
Abstract:
An upgrade has been Performed on the barrel shower counter at Beijing spectrometer to improve the Performance of this detector. For Bhabha events, the energy resolution is better than 21% E
Unification of Gauge Interactions and Gravitation
Liu Yaoyang, Sun Lazhen, Jiang Xiangdong
1999, 23(11): 1054-1061.
Abstract:
Assuming the gauge interactions and gravitation to be trifled in the chiral extension of the standard model, our calculations prove that the generation number of quarks and leptons surely is 3. It is also given that the energy scale of unification is...
SU(3)L×U(1)X Model and a New Candidate for Dark Matter
Chen Fengzhi, Wang Ping
1999, 23(11): 1062-1065.
Abstract:
We consider a gauge model based on SU(3)L×U(1)X symmetry. In the model each lepton family contains a new neutral fermion (N-Particle). We calculate the lifetime of the N-particle and estimate the value of its mass. We show that the N-particle can act...
Rare K-Decays and its Strong Constraints on the Multiscale Walking Technicolor Model
Xiao Zhenjun, Lu Linxia, Zhang Jinyu, Guo Hongkai, Lu Gongru
1999, 23(11): 1070-1077.
Abstract:
We calculate the one-loop Z0-penguin contributions to the rare K-decays,K+→π+νν,KL→π0νν and KL→μ+μ, from the unit-charged pesudo-Goldstone bosons π1 and π8 in the framework of the Multiscale Walking Technicolor Model. We find that: (a) the π1 and π8...
Solve for Energy Spectrum and Function of Ring-Shaped Oscillator by Using Supersymmetry and Shape Invariance
Wang Deyun, Huang Bowen
1999, 23(11): 1078-1082.
Abstract:
This article solved energy eigenvalues and eigenfunction of Ring-shaped oscillator by using supersymmetry and shape invariance method. The present energy spectrum formulas are consistent with the exact solutions obtained with the Feynman path integra...
Two-Loop Correction of Thermodynamic Potential of QCD at Finite Temperature
Chen Xiangjun, Zhang Weining, Huo Lei
1999, 23(11): 1083-1089.
Abstract:
First order correction of thermodynamic potential of QCD at finite temperature are calculated by real-time formulation of Green fuction. The pressure correction of quark-gluon Plasma and the critical temperature correction of deconfinement of hadron ...
Method of Fitting Correction Curve for the Factorial-Moment of Multiparticle Production on the High Energy Collisions
Chen Gang, Liu Lianshou, Gao Yanmin
1999, 23(11): 1090-1096.
Abstract:
On the high energy collisions dynamics distribution of multiparticle production in phace space exist influence unflat distribution. In this paper it is studied carefully for this influence. We have introduce the correction factors, obtained criterion...
Effect of the Choice of the Background on Two-Pion Inter-Ferometry
Chen Xiaofan, Chen Zhilai
1999, 23(11): 1097-1101.
Abstract:
The effect of the choice of the background on the pion source parameters in two-Pion interferometry analyses in relativistic heavy-ion collisions is studied with the two-Pion interferometry at small relative momentum. The analytic relations between t...
Study of Nuclear Behavior in Axially-Symmetric Superdeformation and Triaxial Superdeformation
Xu Jinzhang, Wang Zixing, Chen Xignqu, Xing Zheng
1999, 23(11): 1102-1107.
Abstract:
Using axially-symmetric and triaxial superdeformed models [660 1/2] band in 165Lu is investigated. The observed transition energies can be reproduced quite well in both models. However, the signature staggering index, triaxiality factor and the ratio...
Chaotic Motion of a Nucleon in Mean Field Potential With Octupole Deformation (I) The Formalism of the Propagation of Coherent States in Potential
Liu Fang, Li Xiguo, Li Junqing, Luo Yixiao
1999, 23(11): 1108-1114.
Abstract:
The temporal variation characteristics of nonstationary wave functions are investigated, which enables us to carry out the study of quantum chaotic dynamics with the same starting point as in corresponding classical case, especially to realize the se...
Isospin Effect on the Emission Mechanism of Hot Nuclei in 35MeV/u 40Ar +112Sn/124Sn Reactions
Wu Heyu, Xiao Zhigang, Li Zuyu, Wang Hpmgweo, Duan Limin, Zhang Baoguo, Liu Yongying, Wang Sufang, Jin Genming, Xiao Guoqing, Guo Zhongyan, Zhu Yongtai
1999, 23(11): 1115-1118.
Abstract:
As an extension of radioactive ion beam physics, the research on isospin dependent properties of hot nuclei has increasingly attracted considerable interest. The isospin effect on the decay of hot nuclei in reactions 35MeV/u 40Ar+112Sn/124Sn has been...
Comments on the Bosonnization Technique of Fermions
Feng Shengzu, Ruan Tunan
1999, 23(11): 1119-1124.
Abstract:
The conventional way for the bosonnization of fermions has been based on the Jordon and Wigner scheme. In this paper, we show that this scheme is not correct for k=k′. Therefore the bosonnization of fermions cannot be complete.
A Single Charge State ECR Ion Source
Zhao Yubin, Liu Zhanwei, Zhao Hongwei, Ding Junzhang, Cao Yun, Zhang Zimin, Zhang Xuezhen, Guo Xiaohong
1999, 23(11): 1125-1128.
Abstract:
A compact 2.45GHz electron cyclotron resonance ion source (ECRIS) for high beam current of single charge state has been nuilt at Institute of Modern Physics. A mixed ion (H1+H2+H3) beam current of 90mA is delivered from a single aperture of φ6mm with...

ISSN 1674-1137 CN 11-5641/O4

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