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国家自然科学基金(2007011005)

作品数:5 被引量:2H指数:1
相关作者:卫华荣刘福虎吕绮雯更多>>
相关机构:山西大学更多>>
发文基金:国家自然科学基金更多>>
相关领域:理学更多>>

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Transverse momentum and transverse mass distributions of charged hadrons produced in Au-Au collisions at high energies
2008年
The transverse momentum distribution and the transverse mass distribution of charged hadrons produced in nucleus nucleus collisions at high energies are described by using a two-cylinder model. The results calculated by the model are compared and found to be in agreement with the experimental data of the STAR and E895 Collaborations, measured in A^Au collisions at the relativistic heavy ion collider (RHIC) and alternating-gradient synchrotron (AGS) energies, respectively. In the energy range concerned, the excitation degree of emission source close to the central axis of cylinders increases obviously with the collision centrality and incident energy increasing, but it does not show any obvious change with the increase of the (pseudo)rapidity in central collisions. The excitation degree of emission source close to the side-surface of cylinders does not show any obvious change with the collision centrality, the (pseudo)rapidity, and the incident energy increasing.
刘福虎
Self-affine Multiplicity Fluctuation of Slow Particles in ^16O-AgBr Collisions at 3.7 A GeV
2009年
We study the slow particles in 160-AgBr collisions at 3.7A GeV in nuclear emulsion with the method of twodimensional factorial moments using the Hurst exponent. Our investigation reveals the power law behaviour, exhibited in self-affine analysis, better than that in self-similar analysis. This work shows a clear evidence of self-affine target fragmentation.
李俊生张东海李惠玲刘福虎
Intermittent type fluctuation of target fragments produced in ^(16)O-AgBr interactions at 4.5 AGeV/c
2008年
A study of intermittency of target associated fragments produced in the interactions of ^16O- AgBr at 4.5 AGeV/c with nuclear emulsion using the method of factorial moments, F4, has been performed. The dependence of the moments on the number of bins M is found to follow a power law behavior for the experimental data in terms of new scaled variable Х(Z) suggested by Bialas and Gazdzicki. The anomalous dimensions, dq, increase linearly with the order of moments, q. This observation indicates the association of multifractility with production mechanism of target associated fragments.
李俊生张东海刘福虎
低能重离子诱导反应中轻带电粒子和蒸发剩余物的能谱(英文)被引量:2
2012年
在多源理想气体模型的框架内,用一个关于末态粒子多重数分布的统一描述,研究了低能重离子诱导反应中轻带电粒子和蒸发剩余物的能谱。在同一个激发的复合核中,每个源对带电粒子和蒸发剩余物均贡献一个指数分布的能谱。计算结果与158,170,180和200MeV20Ne+12C反应中,轻带电粒子和蒸发剩余物能谱的实验结果符合。
吕绮雯卫华荣Rahim Magda AFakhraddin S刘福虎
关键词:能谱轻带电粒子
Anisotropic emission of charged mesons and structure characteristic of emission source in heavy ion collisions at 1-2A GeV
2008年
Angular distributions of pious and kaons produced in heavy ion collisions at the low-energy end of high energies (1-2 A GeV) have been investigated by using a multisource ideal gas model. The model covers the expansions and movements of the emission sources, and it is related to the collective flows. By using the analytic expression and the Monte Carlo method, the azimuthal and polar angle distributions of mesons are calculated by the model and compared with the experimental data of the KaoS Collaboration.
刘福虎
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