2003 Vol. 27, No. 9

Particle and field theory
Different χ2 Forms for Correlated Data and Their Properties
MO Xiao-Hu, ZHU Yong-Sheng
2003, 27(9): 747-753.
Abstract:
The properties of four factorized chi-square forms, which are used in minimization of correlated data, are studied, including their biasness and unbiasedness. The simplified R-value measurement are quoted to test the conclusion quantitatively.
Two Photon Width of ηc
PENG Hong-An, YAN Zhan-Yuan, DUAN Chun-Gui
2003, 27(9): 754-758.
Abstract:
Using the hypothesis of maximum non-perturbative strong interaction reaction and basing on the character of none unitarity corrections in the amplitude for exchanging the non-perturbative color octet gluer, constituent of Pomeron, in strong-soft inte...
Final State Interactions in D→PP Decays
Medina Ablikim, DU Dong-Sheng, YANG Mao-Zhi
2003, 27(9): 759-766.
Abstract:
The two-body nonleptonic charmed meson decays into two pseudoscalar mesons are studied using one-particle-exchange method. The effects of the final state interactions are analyzed through the strong phases extracted from the experimental data.
A Electric Sine-Gordon Soliton Solution in Two-Dimensional Dilaton Gravity Model
YAN Jun, TAO Bi-You
2003, 27(9): 767-769.
Abstract:
A periodic solution in two-dimensional dilaton gravity model is obtained in this paper, the equivalence of periodic solution with electric sine-Gordon soliton solution is proved through coordinate transformation.
Supersymmetry of a Double Ring-Shaped Oscillator
HUANG Bo-Wen
2003, 27(9): 770-774.
Abstract:
Supersymmetry and Shape invariance of Double ring-shaped oscillator (DRSO) is studied. The energy eigenvalues and eigenfunctions of DRSO are obtained.
Solution of Time-Dependent Coulomb Potential with Linear Potential
SONG Xiao-Hui, YANG Xin-E, WANG Ping
2003, 27(9): 775-778.
Abstract:
In this paper, we make use of the Burgan et al's method to derive the solution of the time dependent coulomb potential and linear potential with a special form, V(r,t)=-a0ξ 12r+a 1rξ32, (where ξ=at 2+bt+c, a 0, a 1, a,b,c are parameters with certain ...
particle and nuclear astrophysics and cosmology
Studies on the Backgrounds of DAMA Experiments
SHENG Xiang-Dong, DAI Chang-Jiang, HE Hui-Lin
2003, 27(9): 779-783.
Abstract:
Some results have been introduced on China-Italy DAMA cooperation--100kg NaI(Tl) crystal set-up experiments. There are lots of background problems need to be studied carefully, which would affect the results of DAMA experiments. Here, the radiation b...
Nuclear and ion Physics
Signature Splitting and Inversion and Back Bending in Negative Sideband in 80Rb
HE Chuang-Ye, WEN Shu-Xian, ZHU Li-Hua, WANG Zhi-Min, LI Guang-Sheng, MA Rui-Gang, WU Xiao-Guang, YUAN Guan-Jun, YANG Chun-Xiang, WANG Yue, ZHANG Zhen-Long, MENG Rui
2003, 27(9): 784-788.
Abstract:
High spin states of 80Rb have been studied by using fusion evaporation reactions,65Cu+19F,66Zn+18O and 68Zn+16O with beam energies of 75MeV, 76MeV and 80MeV, respectively, at HI-13 Tandem accelerator Beijing and JAERI Japan. γ-γ coincidence and DCO r...
Properties of Spin Polarized Isospin Asymmetric Nuclear Matter
LI Zeng-Hua, ZUO Wei, LIU Jian-Ye, GUO Wen-Jun
2003, 27(9): 789-793.
Abstract:
In this paper, we calculate the properties of the spin polarized isospin asymmetric nuclear matter by employing the Skyrme effective interaction with two sets of parameters SKM * and SⅢ, giving the equation of the state and the radio det(1/χ)det(1/χF...
Shell Anomalies of Mg, Si and S Isotopes
ZHONG Xian-Hui, TAN Yu-Hong, NING Ping-Zhi
2003, 27(9): 794-797.
Abstract:
The shell closure and shell anomalies of Mg, Si and S isotopes are investigated in the framework of relativistic mean-field theory. From two-proton and two-neutron separation gaps, we find that (1) there exist obvious shell effects at N=12, 16 in Mg ...
Effects of Shell on Pre-Scission Particle Emission
YE Wei
2003, 27(9): 798-802.
Abstract:
Influence of the shell effect on the emission of light particles prior to scission is explored in the framework of the Smoluchowski equation. Doubly magic nuclei 208Pb and 132Sn are chosen as examples to demonstrate this shell effect. Results show th...
Dependence of Entropy Index on the Width and Shape of Multiplicity Distributions
ZHANG Hui-Lan, LIU Lian-Shou
2003, 27(9): 803-807.
Abstract:
The dependence of entropy index μ 2 on the width and shape of multiplicity distributions are studied in detail by using Monte Carlo method and comparing with the results from NA22 experiment.It is found that the entropy index is insensitive to the sh...
Detection Technology and Methods
Research on the Software of Track Reconstruction in Vertex Chamber of BESⅡ
ZENG Yu, MAO Ze-Pu
2003, 27(9): 808-812.
Abstract:
The software of track reconstruction of the vertex chamber of BESⅡ-VCJULI was studied when it was transplanted from the HP-Unix platform to PC-Linux. The problems of distinct dictionary storage and precision treatment in these two different platforms...
Kinematic Fit Program Design with Least-Square Method
HUANG Xing-Tao, MA Lian-Liang, WANG Kong-Sen, ZHANG Xue-Yao, HE Mao, ZHANG Nai-Jian
2003, 27(9): 813-818.
Abstract:
Kinematic Fitting is one useful method for physics analysis in order to improve the precision of the parameters to be fitted. Based on the Telesis package written with Fortran which is the code for kinematic fitting, we design a new package called Te...
Accelerator
Study of Insertion Device's Influence on Nonlinear Beam Dynamics in Electron Storage Ring Using Lie Algebra
LI Yong-Jun, WANG Lin, FENG Guang-Yao, XU Hong-Liang, LI Wei-Min, LIU Zu-Ping
2003, 27(9): 819-823.
Abstract:
In designing the 3rd generation synchrotron radiation light source, many long, and dispersion free straight sections are left for installing undulators to produce coherent radiation. For the damping ring used as pre-injector of next generation linear...
Electron Cooling Simulation in HIRFL-CSR Main Ring
YANG Xiao-Dong, Parkhomchuk V, ZHAO Hong-Wei, ZHANG Wen-Zhi, SONG Ming-Tao, YUAN You-Jin, XIA Jia-Wen
2003, 27(9): 824-827.
Abstract:
With the help of electron cooling code, the cooling time of 16O8+ ion beam are simulated in various parameters of the ion beam in the HIRFL-CSR electron cooling storage main ring, such as ion beam energy, initial transverse emittance, and momentum sp...
Particle Simulation of Subnanosecond Millimeter Relativistic Backward Wave Oscillator in the Low Guide Magnetic Field Region
ZHANG Yun-Jian, CHEN Hong-Bin, MENG Fan-Bao, FAN Zhi-Kai
2003, 27(9): 828-830.
Abstract:
Particle simulation results of coherent stimulated radiation from subnanosecond electron bunches moving through a periodic waveguide and interacting with a backward propagating TM01 wave are presented. The longitudinal guiding magnetic field is 1.8T,...
Synchrotron radiation,applications of nuclear techniquees,etc
Analysis and Calculation on Electron Bunch Length Measurement by Using CTR
LI Zhi-Hui, DAI Jian-Ping, YANG Xue-Ping, FAN Yao-Hui, XIE Jia-Lin, ZHU Jun-Biao
2003, 27(9): 831-835.
Abstract:
Measurement of electron bunch length through its generated CTR is a new frequency domain technique developed in the accelerator and FEL fields recently. In this paper we analyze theoretically and calculate numerically CTR produced by a train of RF-li...
Study of Radiative Source Positioning by Counting Rate Variations of a Monitor System
CHU Cheng-Sheng, HUANG Rui-Liang, LIU Xiao-Ya, XIONG Zong-Hua, XIANG Yong-Chun, ZHANG Jian-Hua
2003, 27(9): 836-840.
Abstract:
Standard radiative source are monitored by a system containing several detectors. When a source moved out from the monitored area, the counting rates of the system will be changed, and the position and radiation intensity of the source can be estimat...

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
Author benefits
News
Cover Story

Advertising

Advertising