2011 Vol. 35, No. 12

Particle and field theory
Full lattice QCD study of the κ scalar meson
FU Zi-Wen, Carleton DeTar
2011, 35(12): 1079-1083. doi: 10.1088/1674-1137/35/12/001
Abstract:
We studied the κ light scalar meson in 2+1 flavor full QCD with sufficiently light u and d quarks. Via lattice simulation we measured the correlators for the κ channel in the “Asqtad” improved staggered fermion formulation. After chiral extrapolation...
Casimir force on a piston at finite temperature in Randall-Sundrum models
CHENG Hong-Bo
2011, 35(12): 1084-1094. doi: 10.1088/1674-1137/35/12/002
Abstract:
The Casimir effect for a three-parallel-plate system at finite temperature within the framework of five-dimensional Randall-Sundrum models is studied. In the case of the Randall-Sundrum model involving two branes we find that the Casimir force depend...
Nuclear and ion Physics
Analysis of shower particle pseudorapidity spectra in interactions of relativistic Au and Pb ions with emulsion nuclei
Ali Zaman
2011, 35(12): 1095-1099. doi: 10.1088/1674-1137/35/12/003
Abstract:
The pseudorapidity spectra of fast particles (with β > 0.7 ) produced in Au (at 11.6 A GeV) and Pb (at 158 A GeV) induced collisions with emulsion (Em) nuclei contain some visual plateaus and shoulders. The plateau is wider for Pb+Em reactions compar...
Cross section of reaction 181Ta(p,nγ)181W and the influence of the spin cut-off parameter on the cross section
ZHANG Jun-Jie, HU Bi-Tao
2011, 35(12): 1100-1104. doi: 10.1088/1674-1137/35/12/004
Abstract:
In this work, the program Cindy was modified to calculate the formation cross section of each energy level of residual nucleus 181W resulting from the reaction 181Ta(p,nγ)181W. The concerned cross sections calculated at proton energy Ep=4.5-8.5 MeV a...
Azimuthal correlations of hadrons and fragments in nucleus-nucleus collisions
LI Hui-Ling
2011, 35(12): 1105-1110. doi: 10.1088/1674-1137/35/12/005
Abstract:
Two-particle (two-fragment) azimuthal correlation functions are studied by using a simple formula which describes uniformly azimuthal distributions of final-state charged particles and nuclear fragments. This formula is obtained in the framework of a...
Transverse momentum spectra in high-energy nucleus-nucleus, proton-nucleus and proton-proton collisions
XIE Wen-Jie
2011, 35(12): 1111-1119. doi: 10.1088/1674-1137/35/12/006
Abstract:
The transverse momentum distributions of final-state particles produced in nucleus-nucleus (AA), proton-nucleus (pA), and proton-proton (pp) collisions at high energies are investigated using a multisource ideal gas model. Our calculated results show...
Detection Technology and Methods
Performances of RETGEM with resistive electrodes made of kapton foils
YU Bo-Xiang, LIU Hong-Bang, XIE Yi-Gang, ZHANG Ai-Wu, TANG Ai-Song, YANG Ya-Dan, DONG Yang, LI Min, WANG Zhi-Gang, XIE Yu-Guang, CAI Xiao, ZHOU Li, HU Tao
2011, 35(12): 1120-1123. doi: 10.1088/1674-1137/35/12/007
Abstract:
THGEM with resistive Kapton electrodes (RETGEM) has been developed to make the THGEM more tolerant to discharges. At higher gains with resistive electrodes, serious discharges may travel to the streamer mode, in contrast to violent sparks in conventi...
Simulation and measurement of the resonant Schottky pickup
ZANG Yong-Dong, WU Jun-Xia, ZHAO Tie-Cheng, ZHANG Sheng-Hu, MAO Rui-Shi, XU Hu-Shan, SUN Zhi-Yu, MA Xin-Wen, TU Xiao-Lin, XIAO Guo-Qing
2011, 35(12): 1124-1129. doi: 10.1088/1674-1137/35/12/008
Abstract:
A resonant Schottky pickup with high sensitivity, built by GSI, will be used for nuclear mass and lifetime measurement at CSRe. The basic concepts of Schottky noise signals, a brief introduction of the geometry of the detector, the transient response...
Fast light of CsI(Na) crystals
SUN Xi-Lei, HU Tao, ZHOU Li, CAO Jun, WANG Yi-Fang, ZHAN Liang, YU Bo-Xiang, CAI Xiao, FANG Jian, XIE Yu-Guang, AN Zheng-Hua, WANG Zhi-Gang, XUE Zhen, ZHANG Ai-Wu, NING Fei-Peng, GE Yong-Shuai, LIU Ying-Biao
2011, 35(12): 1130-1133. doi: 10.1088/1674-1137/35/12/009
Abstract:
The responses of different common alkali halide crystals to alpha-rays and gamma-rays are tested in this research. It is found that only CsI(Na) crystals have significantly different waveforms between alpha and gamma scintillations, while others do n...
Scintillating properties of LiYSiO4:Ce
FU Zai-Wei, HENG Yue-Kun, QI Ming, HUANG Pin-Wen, ZHANG Huai-Jin, WANG Ji-Yang, JIA Ru, QIAN Sen, LI Shao-Li, CHEN Xiao-Hui, NING Zhe
2011, 35(12): 1134-1138. doi: 10.1088/1674-1137/35/12/010
Abstract:
LiYSiO4:Ce is a promising scintillator and some of its properties have been reported in previous papers. In this paper, samples doped with different concentrations of Ce are prepared and studied. First, the relative light yields of the samples are me...
Silicon photomultiplier readout system for the ECAL in the PEBS and test results from the system
LI Liang, GONG Guang-Hua, ZENG Ming
2011, 35(12): 1139-1142. doi: 10.1088/1674-1137/35/12/011
Abstract:
Silicon photomultipliers (SiPMs) have remarkable advantages for use in photo-detection. Compared with PMT, SiPM shows advantages of high gain, excellent time resolution, insensitivity to magnetic fields and a lower operating voltage. SiPMs from Hamam...
Accelerator
Measurement and correction of coupling in BEPCⅡ
ZHANG Yuan, YU Cheng-Hui, JI Da-Heng, XU Gang, WEI Yuan-Yuan, QIN Qing
2011, 35(12): 1143-1147. doi: 10.1088/1674-1137/35/12/012
Abstract:
The existing linear coupling theory and representation method are introduced briefly. The so-called local and global coupling is discussed in more detail. The vertical orbit distortion excited by a horizontal corrector is represented with the couplin...
Simulation and experimental study of the solid pulse forming lines for dielectric wall accelerator
ZHAO Quan-Tang, YUAN Ping, ZHANG Zi-Min, CAO Shu-Chun, SHEN Xiao-Kang, LIU Ming, JING Yi, ZHAO Hong-Wei
2011, 35(12): 1148-1151. doi: 10.1088/1674-1137/35/12/013
Abstract:
Two types of pulse forming lines for dielectric wall accelerator (DWA) were investigated preliminarily. By simulation with CST Microwave Studio, the results indicate the pulse forming process, which can help to understand the voltage wave transmissio...
Study on space charge effects of the CSNS/RCS
XU Shou-Yan, WANG Sheng
2011, 35(12): 1152-1158. doi: 10.1088/1674-1137/35/12/014
Abstract:
The Rapid Cycling Synchrotron (RCS) is a key component of the China Spallation Neutron Source (CSNS). The space charge effect is one of the most important issues in the CSNS/RCS, which limits the maximum beam intensity, as well as the maximum beam po...
Study on the W-band photocathode RF gun
ZHU Xiong-Wei
2011, 35(12): 1159-1161. doi: 10.1088/1674-1137/35/12/015
Abstract:
In this paper, we continue our W-band photoinjector work. We discuss the production of a high brightness femtosecond bunch using our proposed W-band photoinjector under different parameters. The parameters of the produced bunch are the energy of 1.2 ...
Synchrotron radiation,applications of nuclear techniquees,etc
Performance evaluation of a parallel-hole collimated detector module for animal SPECT imaging
HUANG Xian-Chao, ZHANG Zhi-Ming, LI Dao-Wu, TANG Hao-Hui, LI Ting, LIAO Yan-Fei, LIU Jun-Hui, WANG Pei-Lin, CHEN Yan, WANG Ying-Jie, WEI Long, SHAN Bao-Ci, WANG Bao-Yi
2011, 35(12): 1162-1165. doi: 10.1088/1674-1137/35/12/016
Abstract:
We have built and investigated a detector module for animal SPECT imaging, especially for use in large field of view (FOV) conditions. The module consists of a PMT-based detector and a parallel-hole collimator with an effective area of 80 mm × 80 mm....
Investigation of scatter from out of the field of view and multiple scatter in PET using Monte Carlo simulations
YE Ting, CHAI Pei, GAO Juan, YUN Ming-Kai, LIU Shuang-Quan, SHAN Bao-Ci, WEI Long
2011, 35(12): 1166-1171. doi: 10.1088/1674-1137/35/12/017
Abstract:
In fully three-dimensional (3D) positron emission tomography (PET) imaging, the scatter fraction (SF) is about 40%-60%, which may degrade the imaging quality severely. Scatter correction is important for high quality image reconstruction. Model-based...

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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