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2009 Vol. 33, No. 10

particle and nuclear astrophysics and cosmology
Prospective results of CHANG'E-2 X-ray spectrometer
PENG Wen-Xi, WANG Huan-Yu, ZHANG Cheng-Mo, CUI Xing-Zhu, CAO Xue-Lei, ZHANG Jia-Yu, LIANG Xiao-Hua, WANG Jin-Zhou, GAO Min, YANG Jia-Wei, WU Ming-Ye
2009, 33(10): 819-825. doi: 10.1088/1674-1137/33/10/001
Abstract:

The Chinese second lunar satellite CE-2, which carries an X-ray spectrometer (XRS), will be launched at the end of 2010. In order to estimate the scientific results of XRS, we simulate the anticipated lunar X-ray spectra observed by XRS by using the ...

Perspective of Galactic dark matter subhalo detection on Fermi from the EGRET observation
YUAN Qiang, BI Xiao-Jun, ZHANG Juan
2009, 33(10): 826-833. doi: 10.1088/1674-1137/33/10/002
Abstract:

The perspective of the detectability of Galactic dark matter subhaloes on the Fermi satellite is investigated in this work. Under the assumptions that dark matter annihilation accounts for the ``GeV excess'' of the Galactic diffuse \upgamma-rays di...

Plasma neutrino energy loss due to the axial-vector current at the late stages of stellar evolution
LIU Jing-Jing
2009, 33(10): 834-837. doi: 10.1088/1674-1137/33/10/003
Abstract:

Based on the Weinberg-Salam theory, the plasma neutrino energy loss rates of vector and axial-vector contributions are studied. A ratable factor of the rates from the axial-vector current relative to those of the total neutrino energy loss rates is a...

Nuclear and ion Physics
Structural evolution of the intruder band in 118Sn
WANG Shou-Yu, Duan Bo-Tao, ZHU Xin-Xin, REN Xiu-Lei, YANG Xiao-Ling, XI Juan, SUN Da-Peng, LIU Xi-Ju, HUA Hui, LI Zhong-Yu, ZHANG Shuang-Quan, QI Bin, YAO Jiang-Ming, ZHU Li-Hua, WU Xiao-Guang, LI Guang-Sheng, LIU Ying, LI Xue-Qin, ZHENG Yun, WANG Lie-Lin, WANG Lei
2009, 33(10): 838-841. doi: 10.1088/1674-1137/33/10/004
Abstract:

Excited states of the positive-parity intruder band in 118Sn have been studied via the 116Cd(7Li, 1p4n) reaction at 7Li energy of 48 MeV using techniques of in-beam γ-ray spectroscopy. This intruder band has been observed up to 7187 keV with spin (16...

Study of various charged ρ-meson masses in asymmetric nuclear matter
YAO Hai-Bo, WU Shi-Shu
2009, 33(10): 842-847. doi: 10.1088/1674-1137/33/10/005
Abstract:

We study the effective masses of ρ-mesons for different charged states in asymmetric nuclear matter (ANM) using the Quantum Hadrodynamics II model. The closed form analytical results are presented for the effective masses of ρ-mesons. We have shown t...

Properties and structure of N=Z nuclei within relativistic mean field theory
GAO Yuan, DONG Jian-Min, ZHANG Hong-Fei, ZUO Wei, LI Jun-Qing
2009, 33(10): 848-853. doi: 10.1088/1674-1137/33/10/006
Abstract:

The axially deformed relativistic mean field theory with the force NLSH has been performed in the blocked BCS approximation to investigate the properties and structure of N=Z nuclei from Z=20 to Z=48. Some ground state quantities such as binding ener...

Critical phenomena in a disc-percolation model and their application to relativistic heavy ion collisions
KE Hong-Wei, XU Ming-Mei, LIU Lian-Shou
2009, 33(10): 854-859. doi: 10.1088/1674-1137/33/10/007
Abstract:

By studying the critical phenomena in continuum-percolation of discs, we find a new approach to locate the critical point, i.e. using the inflection point of P as an evaluation of the percolation threshold. The susceptibility, defined as the derivat...

Detection Technology and Methods
Monte Carlo simulation of the property of a scintillation bar in the multi-neutron correlation spectrometer
SONG Yu-Shou, YE Yan-Lin, GE Yu-Cheng, LÜ Lin-Hui, Faisal Q., JIANG Dong-Xing, HUA Hui, ZHENG Tao, LI Zhi-Huan, LI Xiang-Qing, LOU Jian-Ling, LU Fei, FAN Feng-Ying, CAO Zhong-Xin, LI Qi-Te, XIAO Jun
2009, 33(10): 860-865. doi: 10.1088/1674-1137/33/10/008
Abstract:

To perform a kinematically complete measurement of the dissociation reaction for neutron-rich nuclei, a multi-neutron correlation spectrometer is proposed at Peking University. A Monte Carlo simulation code based on GEANT4 is developed for a single s...

Radiation response of pseudo-MOS transistors fabricated in hardenedfully-depleted SIMOX SOI wafers
BI Da-Wei, ZHANG Zheng-Xuan, ZHANG Shuai, CHEN Ming, YU Wen-Jie, WANG Ru, TIAN Hao, LIU Zhang-Li
2009, 33(10): 866-869. doi: 10.1088/1674-1137/33/10/009
Abstract:

The total dose radiation response of pseudo-MOS transistors fabricated in hardened and unhardened FD (fully-depleted) SIMOX (Separation by Implanted Oxygen) SOI (Silicon-on-insulator) wafers is presented. At 1 Mrad(Si) radiation dose, the threshold v...

BESⅢ track fitting algorithm
WANG Ji-Ke, MAO Ze-Pu, BIAN Jian-Ming, CAO Guo-Fu
2009, 33(10): 870-879. doi: 10.1088/1674-1137/33/10/010
Abstract:

A track fitting algorithm based on the Kalman filter method has been developed for BESⅢ of BEPCⅡ. The effects of multiple scattering and energy loss when the charged particles go through the detector, non-uniformity of magnetic field (NUMF) and wire ...

Monte Carlo study on the low momentum μ-π identification of the BESⅢ EM calorimeter
WANG Zhi-Gang, HE Kang-Lin, AN Zheng-Hua, CAI Xiao, DONG Ming-Yi, FANG Jian, HU Tao, LIU Wan-Jin, NING Fei-Peng, SUN Li-Jun, SUN Xi-Lei, WANG Xiao-Dong, XUE Zhen, YU Bo-Xiang, ZHANG Ai-Wu, ZHOU Li
2009, 33(10): 880-886. doi: 10.1088/1674-1137/33/10/011
Abstract:

The BESⅢ detector has a high-resolution electromagnetic calorimeter which can be used for low momentum μ-π identification. Based on Monte Carlo simulations, μ-π separation was studied. A multilayer perceptron neural network making use of the defined ...

Study of neutron response for two hybrid RPC setups using the GEANT4 MC simulation approach
J. T. Rhee, Y. J. Jeon
2009, 33(10): 887-891. doi: 10.1088/1674-1137/33/10/012
Abstract:

The present article describes a detailed neutron simulation study in the energy range 10-10 MeV to 1.0 GeV for two different RPC configurations. The simulation studies were taken by using the GEANT4 MC code. Aluminum was utilized on the GND and reado...

Accelerator
Experimental results of helicon sources
MIAO Ting-Ting, SHANG Yong, LIU Zhan-Wen, ZHAO Hong-Wei, SUN Liang-Ting, ZHANG Xue-Zhen, ZHAO Huan-Yu, WANG Hui, MA Bao-Hua, LI Xi-Xia, ZHU Yu-Hua, FENG Yu-Cheng, LI Jing-Yu
2009, 33(10): 892-896. doi: 10.1088/1674-1137/33/10/013
Abstract:

Helicon plasma sources are known as efficient generators of uniform and high density plasma. A helicon plasma source was developed for the investigation of plasma stripping and plasma lenses at the Institute of Modern Physics, CAS. In this paper, the...

Precise study of the first deflecting magnet of ``Rhodotron'' (TT200) using transfer matrices and ANSYS11
Farshid Tabbakh
2009, 33(10): 897-900. doi: 10.1088/1674-1137/33/10/014
Abstract:

The beam trajectory in the first deflecting magnet of ``Rhodotron'' TT200 has been analyzed precisely by both optical and simulation methods. We found
discrepancies between these two methods at the order of (10-3) for the
slit distance and deflecting r...

Preliminary result of bunch length measurement using a modified Michelson interferometer
LIN Xu-Ling, ZHANG Jian-Bing, LUO Feng, BEI Hua, LU Shan-Liang, YU Tie-Min, DAI Zhi-Min
2009, 33(10): 901-904. doi: 10.1088/1674-1137/33/10/015
Abstract:

Based on the femtosecond accelerator device which was built at the Shanghai Institute of Applied Physics (SINAP), recently a modified far infrared Michelson interferometer has been developed to measure the length of electron bunches via the optical a...

Matching by solenoids in space charge dominated LEBTs
LI Jin-Hai, TANG Jing-Yu, OUYANG Hua-Fu
2009, 33(10): 905-913. doi: 10.1088/1674-1137/33/10/016
Abstract:

The betatron matching of a rotationally asymmetric beam in space charge
dominated low-energy beam transports (LEBTs) where solenoids are used for
the transverse matching has been studied. For better understanding, the
coupling elements of a beam matrix ...

Synchrotron radiation,applications of nuclear techniquees,etc
Measurement of radiation dose at the north interaction point of BEPCⅡ
MO Xiao-Hu, ZHANG Jian-Yong, ZHANG Tian-Bao, ZHANG Qing-Jiang, Achasov Mikhail, FU Cheng-Dong, Muchnoi Nikolay, QIN Qing, QU Hua-Min, WANG Yi-Fang, WU Jing-Min, XU Jin-Qiang, YU Bo-Xiang
2009, 33(10): 914-921. doi: 10.1088/1674-1137/33/10/017
Abstract:

The technique details for measuring radiation dose are expounded. The results
of gamma and neutron radiation levels are presented and the corresponding radiation shielding is discussed based on the simplified estimation. In addition, the photon radiat...

Study on the characteristics of linac based THz light source
ZHU Xiong-Wei, WANG Shu-Hong, CHEN Sen-Yu
2009, 33(10): 922-925. doi: 10.1088/1674-1137/33/10/018
Abstract:

There are many methods based on linac for THz radiation production. As one of the options for the Beijing Advanced Light, an ERL test facility is proposed for THz radiation. In this test facility, there are 4 kinds of methods to produce THz radiation...

Review
Studies on RFQ accelerators and its applications
CHEN Jia-Er, GUO Zhi-Yu, FU Shi-Nian, FANG Jia-Xun, LU Yuan-Rong, YAN Xue-Qing
2009, 33(10): 926-929. doi: 10.1088/1674-1137/33/10/019
Abstract:

Development activities of Radio Frequency Quadrupole (RFQ) accelerators in China are presented. A 1 MeV O+ RFQ and a 3.5 MeV ADS proton RFQ have been constructed. A novel separated function RFQ is under beam test, a 2 MeV D+ RFQ is under construction...

Recent progress on RF superconducting cavities
HAO Jian-Kui, ZHAO Kui
2009, 33(10): 930-934. doi: 10.1088/1674-1137/33/10/020
Abstract:

RF superconducting (SRF) cavities can work in continuous wave mode or long pulse mode. SRF technology has been developing rapidly since the end of the last century. RF superconducting technology widely used in particle accelerators around the world. ...

ISSN 1674-1137 CN 11-5641/O4

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

  • Particle physics
  • Nuclear physics
  • Particle and nuclear astrophysics
  • Cosmology
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