2011 Vol. 35, No. 9

Particle and field theory
Fine splitting in the charmonium spectrum with a channel coupling effect
YANG Chun, LI Bao-Fei, CHEN Xiao-Lin, DENG Wei-Zhen
2011, 35(9): 797-803. doi: 10.1088/1674-1137/35/9/001
Abstract:
We study the fine splitting in the charmomium spectrum in the quark model with the channel coupling effect, including DD, DD*, D*D* and DsDs, DsDs*, Ds*Ds* channels. The interaction for channel coupling is constructed from the current-current Lagrang...
The dependence of J/ψ-nucleon inelastic cross section on the Feynman variable
DUAN Chun-Gui, LIU Na, MIAO Wen-Dan
2011, 35(9): 804-807. doi: 10.1088/1674-1137/35/9/002
Abstract:
By means of two typical sets of nuclear parton distribution functions, meanwhile taking account of the energy loss of the beam proton and the nuclear absorption of the charmonium states traversing the nuclear matter in the uniform framework of the Gl...
Fourth generation effects in Bs → π-K+ decay
WANG Shuai-Wei, CHANG Qin, HUANG Jin-Shu
2011, 35(9): 808-811. doi: 10.1088/1674-1137/35/9/003
Abstract:
We study the effects of the fourth quark generation model in Bs → π-K+ decay. Combining with the up-to-date experimental measurement for B(Bs → π-K+) and Acpdir(Bs → π-K+) by the CDF Collaboration, we derive the new bound of weak phase øbd, which are...
particle and nuclear astrophysics and cosmology
Effects of the δ meson on the direct Urca processes in neutron stars
YU Zi, DING Wen-Bo
2011, 35(9): 812-816. doi: 10.1088/1674-1137/35/9/004
Abstract:
In the framework of the relativistic mean field theory, the effects of the δ meson on the direct Urca (DURCA) processes are investigated. In a neutron star, the DURCA processes involving nucleons, Λ and Ξ- can take place while the process involving t...
Nuclear and ion Physics
Isospin and mixed symmetry structure in 26Mg
DONG Hong-Fei, BAI Hong-Bo
2011, 35(9): 817-820. doi: 10.1088/1674-1137/35/9/005
Abstract:
The isospin excitation states and electromagnetic transitions of the 26Mg nucleus are studied with the isospin-dependent interacting boson model (IBM-3). The mixed symmetry states at low spin and the main components of the wave function for some stat...
A relativistic continuum Hartree-Bogoliubov theory description of N=3 isotones
HAN Rui, JI Juan-Xia, LI Jia-Xing
2011, 35(9): 821-824. doi: 10.1088/1674-1137/35/9/006
Abstract:
The ground-state properties of N=3 isotones and mirror nuclei have been investigated in the Rrelativistic Continuum Hartree-Bogoliubov theory with the NLSH effective interaction. Pairing correlations are taken into account by a density-dependent δ-fo...
Perturbative pseudospin symmetry limit with linear spin-orbit potential
LI Fang-Qiong, ZHAO Peng-Wei, LIANG Hao-Zhao
2011, 35(9): 825-828. doi: 10.1088/1674-1137/35/9/007
Abstract:
The pseudospin symmetry (PSS) limits which conserve substantial spin-orbit splitting are investigated. It is found that while the strength of the spin-orbit potential as well as the spin-orbit splitting increase, the pseudospin doublets, e.g., 2p3/2 ...
Drell-Yan dilepton production in relativistic heavy-ion collisions at RHIC
FENG Xiu-Mei, ZHANG Ben-Wei
2011, 35(9): 829-832. doi: 10.1088/1674-1137/35/9/008
Abstract:
We investigate the lepton pair production with the Drell-Yan process in relativistic heavy ion collisions by computing the double differential cross section dσ/dM2dy and dσ/dM2dxF at the next-to-leading order in p+Au and Au+Au collisions with √sNN =2...
Study on the method of mini-jet identification in relativistic heavy ion collisions
LI De-Sheng, TIAN Feng-Ge, CHEN Gang
2011, 35(9): 833-837. doi: 10.1088/1674-1137/35/9/009
Abstract:
In this paper a set of methods identifying minijet from final state particles in the relativistic heavy ion collision events is established and the parameter dependence has been investigated in Au+Au collisions at √s= 200 GeV using a multiphase trans...
Detection Technology and Methods
Beam test of signal cross-talk and transmission for LMPRC
SUN Yong-Jie, LI Cheng, TANG Ze-Bo, XU Lai-Lin, CHEN Tian-Xiang, SHAO Ming
2011, 35(9): 838-843. doi: 10.1088/1674-1137/35/9/010
Abstract:
A new prototype of large area Multi-gap Resistive Plate Chamber (MRPC) with long readout strips was built. This Long-strip Multi-gap Resistive Plate Chamber (LMRPC) is double stacked and has ten 250 μm-thick gas gaps. Signals are read out from the tw...
Design and preliminary test results of Daya Bay RPC modules
XU Ji-Lei, GUAN Meng-Yun, YANG Chang-Gen, WANG Yi-Fang, ZHANG Jia-Wen, LU Chang-Guo, Kirk McDonald, Robert Hackenburg, Kwong Lau, Logan Lebanowski, Cullen Newsom, Lin Shih-Kai, Jonathan Link, MA Lie-Hua, Viktor Pec, Vit Vorobel, CHEN Jin, LIU Jin-Chang, ZHOU Yong-Zhao, LIANG Hao
2011, 35(9): 844-850. doi: 10.1088/1674-1137/35/9/011
Abstract:
Resistive Plate Chamber (RPC) modules will be used as one part of the cosmic muon veto system in the Daya Bay reactor neutrino experiment. A total of 189 RPC modules will cover the three water pools in the experiment. To achieve track reconstruction ...
Accelerator
RF phase jitter in a klystron amplifier
LI Zheng-Hong, XIE Hong-Quan
2011, 35(9): 851-854. doi: 10.1088/1674-1137/35/9/012
Abstract:
RF phase jitter is a very important parameter for a relativistic klystron amplifier. This parameter is closely linked with the physics processes in the klystron. RF phase jitter is theoretically studied together with Particle in Cell (PIC) simulation...
Amplitude and phase stability studies in a DC superconducting injector
WANG Fang, LIN Lin, ZHANG He, HAO Jian-Kui, ZHANG Bao-Cheng, LIU Ke-Xin
2011, 35(9): 855-858. doi: 10.1088/1674-1137/35/9/013
Abstract:
The DC superconducting injector will be used in the PKU-THz facility which consists of a DC-gun and a 3+1/2-cell superconducting cavity. The cavity must accelerate the electron beam to 5.82 MeV which is susceptible to perturbations because of its nar...
Low emittance lattice optimization using a multi-objective evolutionary algorithm
GAO Wei-Wei, WANG Lin, LI Wei-Min, HE Duo-Hui
2011, 35(9): 859-864. doi: 10.1088/1674-1137/35/9/014
Abstract:
A low emittance lattice design and optimization procedure are systematically studied with a non-dominated sorting-based multi-objective evolutionary algorithm which not only globally searches the low emittance lattice, but also optimizes some beam qu...
BXERL photo-injector based on a 217 MHz normal conducting RF gun
LIU Sheng-Guang, HUANG Tong-Ming, XU Jin-Qiang
2011, 35(9): 865-869. doi: 10.1088/1674-1137/35/9/015
Abstract:
The Beijing X-ray Energy Recovery Linac (BXERL) test facility is proposed in Institute of High Physics (IHEP). In this proposal, the main linac requires the injector to provide an electron beam with 5 MeV energy and 10 mA average current. An injector...
Synchrotron radiation,applications of nuclear techniquees,etc
Characterization of the nanopore structures of PAN-based carbon fiber precursors by small angle X-ray scattering
WANG De-Hong, HAO Jun-Jie, XING Xue-Qing, MO Guang, GONG Yu, WU Zhong-Hua
2011, 35(9): 870-874. doi: 10.1088/1674-1137/35/9/016
Abstract:
The nanopore structures in precursors are crucial to the performance of PAN-based carbon fibers. Four carbon-fiber precursors are prepared. They are bath-fed filaments (A), water-washing filaments (B), hot-stretching filaments (C) and drying-densific...
GISAXS and SAXS studies on the spatial structures of Co nanowire arrays
CHENG Wei-Dong, MO Guang, XING Xue-Qing, WANG De-Hong, GONG Yu, CAI Quan, CHEN Zhong-Jun, WU Zhong-Hua
2011, 35(9): 875-879. doi: 10.1088/1674-1137/35/9/017
Abstract:
The spatial structures of magnetic Co nanowire array embedded in anodic aluminium membranes were investigated by grazing incidence small angle X-ray scattering (GISAXS) and conventional small angle X-ray scattering (SAXS) techniques. Compared with SE...
Parameter study for enhanced high gain harmonic generation scheme
JIA Qi-Ka, LI He-Ting
2011, 35(9): 880-884. doi: 10.1088/1674-1137/35/9/018
Abstract:
An easy-to-implement scheme called Enhanced High Gain Harmonic Generation is expected to be able to significantly enhance the performance of HG-FEL. In this paper we investigate the effects of the system parameters in the new scheme, including the el...
Raman scattering investigation of C-doped a-SiO2 after high energy heavy ion irradiations
LIU Chun-Bao, WANG Zhi-Guang
2011, 35(9): 885-889. doi: 10.1088/1674-1137/35/9/019
Abstract:
Thermally grown amorphous SiO2 films were implanted at room temperature with 100 keV C-ions to 5.0×1017 or 1.2×1018 ions/cm2. These samples were irradiated at room temperature with 853 MeV Pb-ions to 5.0×1011, 1.0×1012, 5.0×1012 ions/cm2, or with 308...

ISSN 1674-1137 CN 11-5641/O4

Original research articles, Ietters and reviews Covering theory and experiments in the fieids of

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