2007 Vol. 31, No. 4

Particle and field theory
Re-fit of τ Mass Based on Improved Theoretical Calculations
WANG You-Kai, MO Xiao-Hu, YUAN Chang-Zheng, LIU Jue-Ping
2007, 31(4): 325-331.
Abstract:
Recently many theoretical calculations have been made for the cross section of e+e→τ+τ near the threshold, the accuracy of which is up to 10-4. Based on one of the calculations, the e μ-contained final state data are refitted by utilizing the techn...
Probe the R-Parity Violating Supersymmetry Effects in the B0s—B0s Mixing
WANG Ru-Min, LU Gong-Ru, WANG En-Ke, YANG Ya-Dong
2007, 31(4): 332-336.
Abstract:
The recent measurements of the Bs mass difference Δ Ms by the CDF and DO collaborations are roughly consistent with the Standard Model predictions, therefore, these measurements will afford an opportunity to constrain new physics scenarios beyond the...
Antibunching Properties of q-Deformed Coherent Light Field Interacting with a Cascade Three-Level Atom
ZHANG Hui-Hui, ZHOU Xiao-Guang
2007, 31(4): 337-340.
Abstract:
A nonlinear theoretical model of interaction between q-deformed light field and a cascade three-level atom has been constructed. The formal solution of Schr\"{o}dinger equation in the interactive epresentation and the expectation value of the interac...
particle and nuclear astrophysics and cosmology
Observation of the 2005 January 20 GLE Event Using Yangbajing Solar Neutron Telescope & Neutron Monitor
ZHU Feng-Rong, WANG Rui-Guang, TANG Yun-Qiu, LU Hong, CHEN Song-Zhan, CHENG Ning, FENG Zhao-Yang, GUO Yi-Qing, SHI Feng, WANG Yun-Gang, WANG Yue, TAN You-Heng, ZHANG Hu
2007, 31(4): 341-344.
Abstract:
A solar cosmic rays Ground Level Enhancement(GLE) event associated with a X7.1/2b solar flare in 2005 January 20 was observed by the Yangbajing solar neutron telescope(SNT) and neutron monitor(NM), located at Yangbajing Tibet(90.53°E, 30.11°N, 4310m ...
Effect of f0(975) and φ(1020) Mesons on Neutron Star Mater
ZHAO Xian-Feng, WANG Shun-Jin, ZHANG Hua, JIA Huan-Yu
2007, 31(4): 345-349.
Abstract:
In the RMF approach, considering the contributions of the σ* and φ mesons and the hyperons in the baryon octet {N,P,Λ,∑,∑0,∑+0}, the properties of neutron star matter have been investigated. It is found that with the contributions of the σ* and...
Nuclear and ion Physics
Entrance Channel Dependence of the Correlation Function of IMFs in 36Ar+112,124Sn at 35MeV/u
HU Rong-Jiang, XIAO Zhi-Gang, WU He-Yu, DUAN Li-Min, WANG Hong-Wei, YUAN Xiao-Hua, JIN Gen-Ming, ZHU Yong-Tai, LI Zu-Yu, WANG Su-Fang, XU Hu-Shan, ZHANG Bao-Guo, WEI Zhi-Yong, FENG Zhao-Qing, FU Fen
2007, 31(4): 350-356.
Abstract:
The reduced velocity correlation functions of the Intermediate Mass Fragments (IMFs) were measured in the reactions of 36Ar+112,124Sn at 35MeV/u. The anti-correlation at small reduced velocities is more pronounced in 36Ar+124Sn system than that in 36...
Study of Multi-Quasiparticle Excited States in 139Ce
HUA Wei, ZHOU Xiao-Hong, ZHANG Yu-Hu, GUO Ying-Xiang, LEI Xiang-Guo, XIE Cheng-Ying, SONG Li-Tao, WANG Hua-Lei
2007, 31(4): 357-360.
Abstract:
High-spin states in 139Ce have been populated using the 130Te(12C,3n) reaction at beam energy of 50MeV. The level scheme of 139Ce has been revised and extended greatly up to E=5765.0keV. The level structure of 139Ce shows typical characteristics of s...
Isospin Effect on Level Spacing of N=9 Isotones
GUO Yan-Qing, REN Zhong-Zhou
2007, 31(4): 361-365.
Abstract:
The ground-state properties of N=8 and N=9 isotones are investigated in the framework of the single-particle shell model. The isospin effect on the average nuclear potential is taken into account by introducing an isospin-dependent term in the depth ...
Isotopic Dependence of Production Cross Sections of Superheavy Nuclei in Hot Fusion Reactions
FENG Zhao-Qing, JIN Gen-Ming, FU Fen, LI Jun-Qing
2007, 31(4): 366-370.
Abstract:
The dinuclear system model has been further developed by introducing the barrier distribution function method in the process of heavy-ion capture and fusion to synthesize superheavy nuclei. The capture of two colliding nuclei, formation and de-excita...
Detection Technology and Methods
Construction of a Full-Length Prototype of the BESⅢ Drift Chamber and On-Detector Test for the BESⅢ Drift Chamber Electronics
QIN Zhong-Hua, YAN Zhi-Kang, CHEN Yuan-Bo, WU Ling-Hui, LIU Jian-Bei, CHEN Chang, XU Mei-Hang, WANG Lan, MA Xiao-Yan, JIN Yan, LIU Rong-Guang, TANG Xiao
2007, 31(4): 371-376.
Abstract:
A full-length prototype of the BESⅢ drift chamber was built. The experience gained on gas sealing, high voltage supply and front-end electronics installation should be greatly beneficial to the successful construction of the BESⅢ drift chamber. An on...
Correlation between Particle Ionization Energy Loss in MRPC and Its Signal Amplitude
LI Xin, SHAO Ming, LI Cheng, CHEN Hong-Fang, TANG Ze-Bo
2007, 31(4): 377-383.
Abstract:
Based on analysis of STAR-TOFr data from RHIC 62.4GeV Au+Au experiments, correlation between the MRPC signal amplitude (ADC) and the ionization energy loss (dE/dx) in working gas, for different particles (Pion, Kaon, Proton), are studied. Experimenta...
A Transverse Field Gas Ionization Chamber Performed at RIBLL
ZHANG Xue-Heng, SUN Zhi-Yu, HU Zheng-Guo, XU Zhi-Guo, XU Hu-Shan, WANG Meng, MAO Rui-Shi, FU Fen, ZHANG Hong-Bin, HUANG Tian-Heng, ZHENG Chuan, GAO Hui
2007, 31(4): 384-387.
Abstract:
A transverse field gas ionization chamber as ΔE detector at the Radioactive Ion Beam Line in Lanzhou (RIBLL) is described. A high detection efficiency and long plateau are achieved with the mixed gas Ar(80%)+CO2(20%). The energy resolution is 3.25% f...
Improvement of the Radiation Hardness of SIMOX Buried Oxides by Silicon Ion Implantation
HE Wei, ZHANG Zheng-Xuan, ZHANG En-Xia, QIAN Cong, TIAN Hao, WANG Xi
2007, 31(4): 388-390.
Abstract:
The total dose response characteristics of the buried oxides (BOX) in separation by implanted oxygen (SIMOX) silicon-on-insulator (SOI) wafers have been improved by implanting silicon ion into the BOX layers. NMOS/SOI transistors with enclosed-gate s...
Accelerator
Construction of the Phasing System for BEPCⅡ Linac
HOU Mi, GENG Zhe-Qiao
2007, 31(4): 391-394.
Abstract:
In order to get high beam quality, a RF distribution system is required, with minimal phase drifts and errors in the BEPCⅡ linac. The additional installation of phase reference cables and monitoring equipments and stable RF distribution for BEPC lina...
Development of Beam Transport System of “Dragon-Ⅰ”LIA
DAI Zhi-Yong, ZHANG Wen-Wei, XIE Yu-Tong, LI Hong, ZHANG Kai-Zhi, ZHANG Lin-Wen, LI Wei-Feng, LIU Cheng-Jun, DENG Jian-Jun, DING Bo-Nan
2007, 31(4): 395-399.
Abstract:
The development of beam transport system of “Dragon-Ⅰ” linear induction accelerator(LIA) and the achievements are introduced in this paper. Along with the designs of many key elements such as solenoid coil, dipole steering coils, and multi-functional...
Synchrotron radiation,applications of nuclear techniquees,etc
Polarization Characteristic Measurements of the Synchrotron Radiation Beamline Based on Multilayer
SUN Li-Juan, CUI Ming-Qi, ZHU Jie, ZHAO Yi-Dong, ZHENG Lei, MA Chen-Yan, CHEN Kai, ZHAO Jia, ZHOU Ke-Jin, WANG Zhan-Shan, WANG Hong-Chang
2007, 31(4): 400-404.
Abstract:
Using the home-made synchrotron radiation soft X-ray polarimeter based on multilayer elements, the polarization characteristics of the Beamline 3W1B have been measured at Beijing Synchrotron Radiation Facility (BSRF). This paper compares the measurin...
Development of the Broadband and Dual-band Cavity Mirrors for SR-FEL at 355nm and 248nm
GAO Huai-Lin, WANG Nai-Yan, WANG Dong-Lei, WANG Yong
2007, 31(4): 405-408.
Abstract:
The cavity mirrors of the storage-ring free-electron laser (SR-FEL) at 355nm and 248nm central wavelengths have been developed with the technologies of electron-beam evaporation deposition and ion-beam sputter deposition. The mirror coatings consists...
Influence of Sampling Interval and Number of Projections on the Quality of SR-XFMT Reconstruction
DENG Biao, YU Xiao-Han, XU Hong-Jie
2007, 31(4): 409-413.
Abstract:
Synchrotron Radiation based X-ray Fluorescent Microtomography (SR-XFMT) is a nondestructive technique for detecting elemental composition and distribution inside a specimen with high spatial resolution and sensitivity. In this paper, computer simulat...
Theoretical Study of Segmented Undulator Phase Matching
LU Hui-Hua, CHEN Sen-Yu
2007, 31(4): 414-418.
Abstract:
Phase matching between different undulator segments is a key condition for high gain Free Electron Laser facilities to gain saturation laser output. This paper develops theoretical study on phase matching, provides the scheme to realize it and gives ...

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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  • Nuclear physics
  • Particle and nuclear astrophysics
  • Cosmology
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