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81.
根据喷注判定的圆锥法来判断喷注,重新分析了UA1-1985年的630GeV非单衍pp碰撞实验数据。分析发现对事件样本,单事件平均横动量p与多重数n是正关联的,而对喷注事件子样本则是负关联的;分析了微喷注产生嵉墓亓屯斯亓砻魑⑴缱⒉丛从诜侨砉毯透呓仔вΓ徊⑹状未邮笛樯瞎鄄獾轿⑴缱⒓浯嬖诖罂於燃涓裟谖蘖W拥氖吕治隽宋⑴缱⒉贝嬖诖罂於龋纾幔鸬募O蟆 相似文献
82.
Sourendu Gupta 《Pramana》2003,61(5):877-888
I describe how lattice computations are being used to extract experimentally relevant features of the quark gluon plasma.
I deal specifically with relaxation times, photon emissivity, strangeness yields, event-by-event fluctuations of conserved
quantities and hydrodynamic flow. Finally I give evidence that the plasma is rather liquid-like in some ways. 相似文献
83.
Y. S. Tergiman F. Fraija M. C. Bacchus-Montabonel 《International journal of quantum chemistry》2002,89(4):322-328
Ab initio potential energy curves and coupling matrix elements of the molecular states involved in the collision of the N4+(2s)2S and B3+(1s2)1S multicharged ions on the helium atom or molecular hydrogen have been determined by means of configuration interaction methods. The total and partial electron capture cross-sections have been evaluated in the frame of a semiclassic approach in the 1- to 100-keV laboratory energy range and compared to experimental data. A comparative study of both targets is performed in the case of the B3+ ion. © 2002 Wiley Periodicals, Inc. Int J Quantum Chem, 2002 相似文献
84.
JET and ASDEX data for the correlations of ELM's frequency with pedestal plasma temperature and density are compared with a corresponding functional dependence predicted by a classical Fokker‐Planck approach. Deviations of the predicted relaxation time from the experimental data are found to increase with the input power. They are discussed in relation with a possible non‐diffusional transport of plasma into the SOL. This approach gives opportunity to express the impact of the main engineering factors on ELM's frequency and to extrapolate it for ITER scenaria. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
85.
We review experimental and theoretical studies devoted to extract information on the behaviour of the symmetry energy, in
density regions different from the normal value, with charge-asymmetric reactions at Fermi energies. In particular, we focus
on the analysis of fragmentation reactions and isotopic properties of the reaction products. Results concerning “isoscaling”
properties and the N/Z equilibration among the reaction partners in semi-peripheral reactions are also discussed. 相似文献
86.
T.P. Grozdanov E.A. Solov'ev 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》1999,6(1):13-22
The problem of determination of momentum distributions of ejected electrons in slow atomic collisions is studied within the
impact-parameter method by using a dynamic adiabatic basis which takes into account the correct boundary conditions. An expression
is obtained which relates the momentum distribution of the ejected electrons with a coherent sum of the delocalized dynamic
adiabatic eigenstates (elementary wavepackets). The form of the momentum distribution exactly coincides with the form of the total wavepacket in configuration space. General formulas are applied to a model problem of
electron detachment in the process in which the electron-atom interactions are described by the zero-range potentials. In the example considered, the momentum
distribution of ejected electrons, in the center-of-mass frame, exhibits a maximum located in the scattering plane on the
circle of radius (in atomic units), where v is the relative collision velocity and is the impact parameter.
Received: 5 October 1998 相似文献
87.
Young-Dae Jung 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》1999,7(2):249-254
In strongly coupled plasmas, the orientation phenomena for direct excitations in electron-hydrogenic ion collisions are investigated using the ion-sphere interaction potential. For small
impact parameters, the orientation parameters have minima which correspond to the complete transitions. The target screening effects slightly increase the probability of populating the 2p-1 state.
Received: 16 December 1998 / Received in final form: 23 March 1999 相似文献
88.
A method for investigating the azimuthal correlations between directed and elliptic flow in heavy ion collisions is described.The transverse anisotropy of particle emission at AGS energies is investigated within the RQMD model.It is found that the azimuthal correlations between directed and elliptic flow are sensitive to the incident energy and impact parameter.The fluctuations in the initial stage and dynamical evolution of heavy ion collisions are not negligible. 相似文献
89.
J. -L. Charvet R. Dayras D. Durand O. Lopez D. Cussol D. Dor L. Nalpas A. Van Lauwe C. Volant 《Nuclear Physics A》2004,730(3-4):431-447
A previous analysis of the charge (Z) correlations in the ΔZ−Z plane for 129Xe+natSn central collisions at 32 MeV/n has shown an enhancement in the production of equally sized fragments (low ΔZ) which was interpreted as an evidence for spinodal decomposition. However, the signal is weak and rises the question of the estimation of the uncorrelated yield. After a critical analysis of its robustness, we propose in this paper a new technique to build the uncorrelated yield in the charge correlation function. The application of this method to 129Xe+natSn central collision data at 32, 39, 45 and 50 MeV/n does not show any particular enhancement of the correlation function in any ΔZ bin. 相似文献
90.