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DYNAMICAL FEATURES OF MEDIUM ENERGY HEAVY ION COLLISION PROCESSES

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Chinese Physics Letters 1989年第3期6卷 117-121页

作者： ZHENG Yuming sa benhao ZHANG Xiaoze Institute of Atomic Energy Beijing

A semiclassical dynamical simulation for medium and highenergy heavy ion collisions is presented and used to discuss in detail the features of evolution for ^(12)C(25GeV;b=0.0fm)+^(63)Cu *** the calculated results it is shown that the model proposed can give a reasonable picture of the compression,expansion and fragmentation processes of the system in heavy ion reaction.

关键词： reaction fragmentation expansion

Rapidity,Transverse Mass Distributions and Nuclear Stopping in(14.6 AGeV/c)Si+A u Reactions

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Chinese Physics Letters 1993年第8期10卷 468-471页

作者： WANG Zhongqi sa benhao LU Zhongda ZHANG Xiaoze SONG Guang ZHENG Yuming CCAST(World Lab.) Beijing 100080 China Institute of Atomic Energy Beijing 102413(mailing address)

The experimental data of proton and pion rapidity distributions and proton transverse mass distribution in rcaction of(14.6AGeV/c)Si+Au are compared with a simple relativistic hadronic cascade *** theoretical results ... 详细信息

关键词： energy statement

Equilibrating in Intermediate-High Energy Nuclear Reaction

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Chinese journal of nuclear physics 1997年第4期19卷 198-201页

作者： Lu, Zhongdao sa, benhao Zheng, Yuming Wang, Hui Chu, Zili China Inst of Atomic Energy Beijing China

The equilibrating problem for intermediate-high energy reaction is studied by themicroscopic kinetic *** calculations are carried out for reaction 830 MeV p+*** evolution of the squared momentum components and the kin... 详细信息

关键词： Equilibrating Intermediate-high energy reaction Microscopic kinetic model

THE FRAGMENT MASS DISTRIBUTION IN C+Ag COLLISIONS

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Chinese Physics Letters 1988年第1期5卷 13-16页

作者： LU Zhaoqi ZHANG Xiaoze sa benhao Institute of Atomic Energy Beijing

The mass yield distribut ion in C+Ag collision has been *** only the data are reproduced very well,but also a power law A^(-τ) is established for light *** addition,the impact parameter dependence of the number of fragments and the evaporation neutrons as well as the fragment mass distribution for different impact parameter is given.

关键词： parameter collision addition

ee0A GeV S+ Au反应中光子产生的低横动量增强

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高能物理与核物理 2000年第3期24卷 220-224页

作者：王辉萨本豪台安中国原子能科学研究院北京102413 中国科学院高能物理研究所北京100039

用建立在ＬＵＮＤ弦模型特别是ＰＹＴＨＩＡ事件产生器基础上的描写极端相对论性核一核碰撞的强子和弦级联模型——ＪＰＣＩＡＥ研究了入射能量为２００ＡＧｅＶ的Ｓ＋Ａｕ中心碰撞中光子产生．模型同时考虑了部分子ＱＣＤ散射过程... 详细信息

用建立在ＬＵＮＤ弦模型特别是ＰＹＴＨＩＡ事件产生器基础上的描写极端相对论性核一核碰撞的强子和弦级联模型——ＪＰＣＩＡＥ研究了入射能量为２００ＡＧｅＶ的Ｓ＋Ａｕ中心碰撞中光子产生．模型同时考虑了部分子ＱＣＤ散射过程、强子末态相互作用以及强子衰变等光子产生反应道并作了协调处理．ＪＰＣＩＡＥ模型计算结果很好再现了ＷＡ９３实验数据所呈现的低横动量增强效应．

关键词：光子产生低横动量增强 JPCIAE模型

Effect of Pion Mean-Field on Properties of Pions and Kaons From Heavy-Ion Collisions

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Chinese journal of nuclear physics 1996年第3期 125-132页

作者： Zheng Yuming Chu Zili Wang Hui sa benhao China Institude of Atomic Energy,P.O.Box 275(18).Beijing 102413

The Relativistic Vlasov-Uehling-Uhlenbeck(RVUU)model is used to study the properties of pi-ons and kaons produced in heavy ion *** include the nuclear medium effect on kaon and pionin the model,and simulate pion production and subthreshold kaon production in Kr+Zr reactions at 1GeV/*** calculated results show that the attractive pion optical potential changes the final-state pionmomentum spectrum,enhancing the yield of pions with low transverse *** the same ti1e it alsoincreases the kaon abundance and modifies the kaon momentum distribution.

关键词： —Heavy-ion Particle production Medium ettect

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ALADIN热曲线的微正则系综分析

高能物理与核物理 2000年第1期24卷 60-65页

作者：陈奋策萨本豪王辉陆中道福建教育学院福州350001 中国高等科学技术中心北京100080 中国原子能科学研究院北京102413

用微正则瞬时多碎裂统计模型分析了ＡＬＡＤＩＮ热曲线．结果表明落在ＡＬＡＤＩＮ热曲线温度平台（温度扭曲）附近的弹剩余核（热核）的理论代表点，并不落在相应弹剩余核热曲线的温度平台（扭曲）范围内，从而对ＡＬＡＤＩＮ热曲线是... 详细信息

用微正则瞬时多碎裂统计模型分析了ＡＬＡＤＩＮ热曲线．结果表明落在ＡＬＡＤＩＮ热曲线温度平台（温度扭曲）附近的弹剩余核（热核）的理论代表点，并不落在相应弹剩余核热曲线的温度平台（扭曲）范围内，从而对ＡＬＡＤＩＮ热曲线是否可作为核液气相变的证据提出质疑。

关键词： ALADIN热曲线微正则系综热核多重碎裂

A Circumstantial Evidence for the Possible Production of QGP in the 158A GeV/c Central Pb+Pb Collisions

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A Circumstantial Evidence for the Possible Production of QGP...

EFFECTS OF ENERGY CONSERVATION IN THREE-FIREBALL MODEL

第十次全国核结构研讨会暨第六次全国核结构专题讨论会

作者： Zhiyi Liu, benhao sa, Shuhua Zhou China Institute of Atomic Energy, P.O.Box 275(18), 102413

Hadron and string cascade model(JPCIAE)with the hypothesis without intro-ducing the quark-gluon plasma(QGP),is employed to study the direct photon andπ0 transverse momentum distributions for central 208Pb+208Ph collisions at 158AGeV/*** model,is based on LUND model,especially on the envent genera-tor PYTHIA,and can be used to simulate the relativistic nucleus-nucleus collisionswhere PYTHIA is called to deal with hadron-hadron *** our work,thetheoretical results of transverse momentum distribution for both the direct photonand the π0 particle are lower than the data of WA98 ***,JPCIAEmodel can ever explain successfully the results of WA80 and WA93 experiments ofcentral S+Au collisions at 200A GeV/c where no evidence of direct photon *** considered the results of WA80 and WA93 experiments can be explainedbut WA98’s can’t,that might provide a circumstantial evidence for the possibleproduction of QGP in the high-energy central Pb+Pb collisions.

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Chinese Science Bulletin 1988年第2期33卷 106-110页

作者：杨夏舟郑玉明萨本豪 Institure of Atomic Energy of China Beijing

It has been explained that the Three-Fireball Model (TFM) is a successful method for describing the multiplicity distribution, the rapidity distribution and others observed in the nondiffractive hadron-hadron collisionst. In this model, it is assumed that the three fireballs are formed at distinct rapidity regions in the hadron-hadron collision processes. The energies of the fireballs are provided

关键词： hadron collision multiplicity assumed explained momentum Probability conservation describing confined