期刊：
EUROPEAN PHYSICAL JOURNAL C,1997年76(4):659-663 ISSN：1434-6044
通讯作者：
Adamovich, MI
作者机构：
PN Lebedev Phys Inst, Moscow 117924, Russia.;Inst High Energy Phys, KZ-480082 Alma Ata 82, Kazakhstan.;Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China.;Inst Gravitat & Space Res, Bucharest, Romania.;Panjab Univ, Dept Phys, Chandigarh 160014, India.
摘要：
The anomalous behavior of 2-dimensional scaled factorial moments for charged hadrons in nucleus-nucleus collisions is studied in some detail using both mini-bias and central collision data of O-16- and Au-197-Em interactions from EMU01 experiment. The analysis is carried out in terms of Hurst exponents, suggesting the necessity of different partitions in pseudo-rapidity and azimuthal angle. The results can be interpreted tentatively as due to the superposition effect in nucleus-nucleus collisions.
作者机构：
HIGH ENERGY PHYS INST, ALMA ATA, KAZAKHSTAN.;ACAD SINICA, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA.;INST GRAVIATAT & SPACE RES, BUCHAREST, ROMANIA.;PANJAB UNIV, DEPT PHYS, CHANDIGARH 160014, INDIA.;HUNAN EDUC INST, DEPT PHYS, CHANGSHA, HUNAN, PEOPLES R CHINA.
摘要：
Results on charged particle multiplicities, densities and fluctuations from central Pb+Pb interactions at 158 A GeV are presented and discussed. (C) 1997 Elsevier Science B.V.
作者机构：
[刘堂昆] Department of Physics, Hubei Normal College, Huangshi, 435002, China;[彭金生] Department of Physics, Huazhong Normal University, Wuhan, 430070, China
通讯机构：
[Liu, T.] D;Department of Physics, Hubei Normal College, China
摘要：
We investigate the effect of virtual photon processes (due to the antirotating terms in the Hamiltonian) on the time-dependent physical spectrum emitted by a two-level atom interacting with a single-mode quantized field in a perfect cavity. By means of a Heisenberg operator perturbative technique, a generalized emission spectrum is obtained which includes a contribution from the phase-dependent quantum interference between the real and virtual photons. The spectrum is phase sensitive. The effects of different statistics of the initial cavity mode are reported. For the cavity mode in a coherent state, one of the sidebands in the atomic emission spectrum can be reduced whilst the other can be enhanced due to the virtual photon transitions. The effect can be significant, and may be detected using a highly excited Rydberg atom in a microwave cavity with a high quality factor.
作者机构：
[胡响明; 彭金生] Institute of Applied Physics, Huazhong Normal University, Wuhan 430070, China;Department of Physics, Huazhong Normal University, Wuhan 430070, China
通讯机构：
Institute of Applied Physics, Huazhong Normal University, China
作者机构：
CENT CHINA NORMAL UNIV,DEPT PHYS,WUHAN 430070,HUBEI,PEOPLES R CHINA.;UNIV SCI & TECHNOL CHINA,CTR FUNDAMENTAL PHYS,HEFEI 230026,ANHUI,PEOPLES R CHINA.;NANJING UNIV SCI & TECHNOL,DEPT APPL PHYS,NANJING 210014,JIANGSU,PEOPLES R CHINA.;[Xiao, CY] CHINESE CTR ADV SCI & TECHNOL,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA.
摘要：
The magnetic properties of CoN clusters (N=1, 13, 19, and 43) embedded in copper matrix are studied using the discrete-variational local-spin-density-functional method and embedded cluster models. Single Co atom in Cu is found to be nonmagnetic, while all the rest Co clusters in Cu are still magnetic with reduced moments. Cu atoms in granular Co/Cu system reveal similar spin polarizations to Cu atoms in Co/Cu multilayers as manifested in recent x-ray magnetic circular dichroism measurements.
作者机构：
[胡响明; 汪德新] Institute of Applied Physics, Huazhong Normal University, Wuhan 430070, China;Department of Physics, Huazhong Normal University, Wuhan 430070, China
通讯机构：
Institute of Applied Physics, Huazhong Normal University, China
期刊：
EUROPEAN PHYSICAL JOURNAL A,1997年358(3):337-351 ISSN：1434-6001
通讯作者：
Adamovich, MI
作者机构：
INST HIGH ENERGY PHYS,ALMATY,KAZAKHSTAN.;ACAD SINICA,INST HIGH ENERGY PHYS,BEIJING,PEOPLES R CHINA.;PANJAB UNIV,DEPT PHYS,CHANDIGARH 160014,INDIA.;HUNAN EDUC INST,DEPT PHYS,CHANGSHA,PEOPLES R CHINA.;JOINT INST NUCL RES,LAB COMP TECH,DUBNA,RUSSIA.
摘要：
Complex analysis of Gold interaction with photoemulsion nuclei at 10.7 GeV/nucleon has been performed. The data obtained were compared with a modified FRITIOF model which allowance is made for exitation of nuclear residuals (after interaction). A comparison was also made with cascade-evaporation model. Experimental data contradict the CEM supposition of fast resonance decay and complete cascading. The modified FRITIOF model fairly well reproduces experimental observations. According to the model the production mechanism of charged particles must remain unchangable in the 4-200 GeV/n energy range.
摘要：
A spectral representation for two-point Green function for arbitrary composite field operators is derived in Thermo Field Dynamics (;TFD). The application to two-to-two scattering at finite temperature shows that the corresponding cross section is of the form sigma=sigma(d)-sigma(i) for two bosons or two fermions, which is similar to the decay rate Gamma=Gamma(d)-Gamma(i) for single boson. The cross section sigma(d) for the scattering process and sigma(i) for the corresponding inverse process determine the rate of approaching to equilibrium of the particle distribution function.
作者机构：
[Li, YD; Liu, LS] Institute of Particle Physics, Huazhong Normal University, Wuhan 430070, China
通讯机构：
[Li, YD] H;HUAZHONG NORMAL UNIV, INST PARTICLE PHYS, WUHAN 430070, PEOPLES R CHINA.
关键词：
HERA
摘要：
The dependencies of two-jet cross section on renormalization scale and factorization scales of resolved photon and proton are investigated up to next-to-leading order (NLO) QCD. It is shown that the NLO cross section is quite sensitive to the choice of the renormalization scale and the factorization scales of resolved photon and proton in large invariant mass and large negative rapidity of the two-jet system.
期刊：
Chinese Astronomy and Astrophysics,1997年21(4):405-414 ISSN：0275-1062
通讯作者：
Liu, X.-Y.
作者机构：
[YangPi-bo; LiuXiao-yong; YangLan-tian] Institute of Astrophysics, Central China Normal University, Wuhan, 430079, China;[ChenShao-li] Wuhan College of Textile Industry, Wuhan, China
通讯机构：
[Liu, X.-Y.] I;Institute of Astrophysics, Central China Normal University, China
摘要：
Considering nonthermal e±-pair production, this paper is focused on the radial structure of hot one-temperature accretion flows with advection under the condition of small viscous parameter (α = 0.1) and low mass-accretion rates. Self-similar relations of hot flow with advection have been adopted. The authors have used a scheme, in which the two regions of accretion flow are calculated separately and then joined together. Some typical features of hot flow with advection have been confirmed, and several new results obtained: there exists a critical radius rcr; the local cooling rate is inversely proportional to the square of the mass of the central object; the e±-pair process affects significantly the radiation of hot flows with advection.
作者机构：
Department of Physics, Central China Normal University, Wuhan, China;Department of Solid State Electronics, Huazhong University of Science and Techndogy, Wuhan, China;[Li, YP] Department of Physics, University of Science and Technology of China, Hefei, China;[Huang, XT; Qi, SR; Li, XJ] Department of Physics, Central China Normal University, Wuhan, China<&wdkj&>Department of Solid State Electronics, Huazhong University of Science and Techndogy, Wuhan, China
通讯机构：
[Huang, XT] C;CENT CHINA NORMAL UNIV,DEPT PHYS,WUHAN 430070,PEOPLES R CHINA.
摘要：
<正> Up to now, there have been many indistinctive points in the image interpretation of scanning tunnelhng microscopy （STM） system, and the problems have attracted almost all STM scientists’ attention. In 1992, Kenkre proposed the new programme which describes the behaviour of the electrons moving in the STM tunnelling by the method of exciton dynamics, and the programme not only breaks through the restrictions of Tersoff-Hamann theory, but also can be applied conveniently to discussing the effects of the tip structure, adsorbate structure, substrate structure, temperature, tunneling voltage, and the degree of coherence of elec-
