2015 Vol. 39, No. 9

Precision measurement of the integrated luminosity of the data taken by BESIII at center-of-mass energies between 3.810 GeV and 4.600 GeV
M. Ablikim, M. N. Achasov, X. C. Ai, et al. (BESⅢ Collaboration)
2015, 39(9): 093001. doi: 10.1088/1674-1137/39/9/093001
Abstract:
From December 2011 to May 2014, about 5 fb-1 of data were taken with the BESIII detector at center-of-mass energies between 3.810 GeV and 4.600 GeV to study the charmonium-like states and higher excited charmonium states. The time-integrated luminosi...
Identifying the structure of near-threshold states from the line shape
CHEN Guo-Ying, HUO Wen-Sheng, ZHAO Qiang
2015, 39(9): 093101. doi: 10.1088/1674-1137/39/9/093101
Abstract:
We revisit the compositeness theorem proposed by Weinberg in an effective field theory (EFT) and explore criteria which are sensitive to the structure of S-wave threshold states. On a general basis, we show that the wave function renormalization cons...
Particle and field theory
New method of applying conformal group to quantum fields
HAN Lei, WANG Hai-Jun
2015, 39(9): 093102. doi: 10.1088/1674-1137/39/9/093102
Abstract:
Most of previous work on applying the conformal group to quantum fields has emphasized its invariant aspects, whereas in this paper we find that the conformal group can give us running quantum fields, with some constants, vertex and Green functions r...
Possible supersymmetric kinematics
HUANG Chao-Guang, LI Lin
2015, 39(9): 093103. doi: 10.1088/1674-1137/39/9/093103
Abstract:
The contraction method in different limits to obtain 22 different realizations of kinematical algebras is applied to study the supersymmetric extension of AdS algebra and its contractions. It is shown that p2 h_, p', c2 and g' algebras, in addition t...
Nuclear
Pion emission in α-particle interactions with varioustargets of nuclear emulsion detector
Z. Abou-Moussa, N. Rashed, B. M. Badawy, H. A. Amer, W. Osman, M. M. El-Ashmawy
2015, 39(9): 094001. doi: 10.1088/1674-1137/39/9/094001
Abstract:
The behavior of relativistic hadron multiplicity for 4He-nucleus interactions is investigated. The experiment is carried out at 2.1 A and 3.7 A GeV (Dubna energy) to search for the incident energy effect on the interactions inside different emulsion ...
Shape coexistence and evolution in neutron-deficient krypton isotopes
BAI Zhi-Jun, FU Xi-Ming, JIAO Chang-Feng, XU Fu-Rong
2015, 39(9): 094101. doi: 10.1088/1674-1137/39/9/094101
Abstract:
Total Routhian Surface (TRS) calculations have been performed to investigate shape coexistence and evolution in neutron-deficient krypton isotopes 72,74,76Kr. The ground-state shape is found to change from oblate in 72Kr to prolate in 74,76Kr, in agr...
Total Routhian surface calculations of triaxial or γ-soft propertiesin even-A N=76 isotones with 54≤Z≤68
YANG Qiong, WANG Hua-Lei, CHAI Qing-Zhen, LIU Min-Liang
2015, 39(9): 094102. doi: 10.1088/1674-1137/39/9/094102
Abstract:
Total Routhian surface (TRS) calculations for even-even N=76 isotones with 54≤Z≤68 have been performed in three-dimensional (β2, γ, β4) deformation space. Calculated results of the equilibrium deformations are presented and compared with other theore...
Mass excess of 69Br and the rp process
J. -B. Bueb
2015, 39(9): 094103. doi: 10.1088/1674-1137/39/9/094103
Abstract:
The proton separation energy Sp of -786.07±11.49 keV has been evaluated for 69Br from a least squares fit of mass difference of analog states versus α/A1/3, where α is the average charge of the mirror nuclei and A is the mass number. The extracted Sp...
Mean-field approximation for the chiral soliton in achiral phase transition
ZHANG Hui, SHU Song
2015, 39(9): 094104. doi: 10.1088/1674-1137/39/9/094104
Abstract:
Using the mean-field approximation, we study the chiral soliton within the linear sigma model in a thermal vacuum. The chiral soliton equations with different boundary conditions are solved at finite temperatures and densities. The solitons are discu...
particle and nuclear astrophysics and cosmology
Inflation in de Sitter spacetime and CMB large scale anomaly
ZHAO Dong, LI Ming-Hua, WANG Ping, CHANG Zhe
2015, 39(9): 095101. doi: 10.1088/1674-1137/39/9/095101
Abstract:
The influence of cosmological constant-type dark energy in the early universe is investigated. This is accommodated by a new dispersion relation in de Sitter spacetime. We perform a global fit to explore the cosmological parameter space by using the ...
Detection Technology , Electronics and Methods
Mechanical research and development of a monocrystallinesilicon neutron beam window for CSNS
ZHOU Liang, QU Hua-Min
2015, 39(9): 096001. doi: 10.1088/1674-1137/39/9/096001
Abstract:
The monocrystalline silicon neutron beam window is one of the key components of a neutron spectrometer. Monocrystalline silicon is brittle and its strength is generally described by a Weibull distribution due to the material inhomogeneity. The window...
p/π+ response of single layer THGEM detector in Ar+3% iC4H10
HONG Dao-Jin, YU Bo-Xiang, LIU Hong-Bang, HE Xiao-Rong, AN Guang-Peng, CHEN Hai-Tao, CHEN Shi, HU Tao, LI Jia-Cai, LIU Qian, NIU Shun-Li, RUAN Xiang-Dong, XIE Yi-Gang, ZHANG Xuan, ZHENG Yang-Heng
2015, 39(9): 096002. doi: 10.1088/1674-1137/39/9/096002
Abstract:
In this work, we study the response of a single layer Thick Gaseous Electron Multiplier (THGEM) detector to p/π+ at the E3 line of the Beijing Test Beam Facility. The THGEM detector drift gap used in this study is 4 mm, and the gain of the detector o...
Preliminary study of light yield dependence on LAB liquidscintillator composition
YE Xing-Chen, YU Bo-Xiang, ZHOU Xiang, ZHAO L, DING Ya-Yun, LIU Meng-Chao, DING Xue-Feng, ZHANG Xuan, JIE Quan-Lin, FANG Jian, CHEN Hai-Tao, HU Wei, NIU Shun-Li, YAN Jia-Qing, ZHAO Hang, HONG Dao-Jin
2015, 39(9): 096003. doi: 10.1088/1674-1137/39/9/096003
Abstract:
Liquid scintillator (LS) will be adopted as the detector material in JUNO (Jiangmen Underground Neutrino Observatory). The energy resolution requirement of JUNO is 3%, which has never previously been reached. To achieve this energy resolution, the li...
Monochromatic X-ray-induced thermal effect on four-reflection
HU Ling-Fei, GAO Li-Dan, LI Zhen-Jie, WANG Shan-Feng, SHENG Wei-Fan, LIU Peng, XU Wei
2015, 39(9): 096004. doi: 10.1088/1674-1137/39/9/096004
Abstract:
The high energy resolution monochromator (HRM) is widely used in inelastic scattering programs to detect phonons with energy resolution, down to the meV level. Although the large amount of heat from insertion devices can be reduced by a high heat-loa...
Total dose radiation and annealing responses of the backtransistor of Silicon-On-Insulator pMOSFETs
ZHAO Xing, ZHENG Zhong-Shan, LI Bin-Hong, GAO Jian-Tou, YU Fang
2015, 39(9): 096101. doi: 10.1088/1674-1137/39/9/096101
Abstract:
The total dose radiation and annealing responses of the back transistor of Silicon-On-Insulator (SOI) pMOSFETs have been studied by comparing them with those of the back transistor of SOI nMOSFETs fabricated on the same wafer. The transistors were ir...
Accelerator
Design of a 10 MeV normal conducting CW proton linacbased on equidistant multi-gap CH cavities
LI Zhi-Hui
2015, 39(9): 097001. doi: 10.1088/1674-1137/39/9/097001
Abstract:
Continuous wave (CW) high current proton linacs have wide applications as the front end of high power proton machines. The low energy part of such a linac is the most difficult and there is currently no widely accepted solution. Based on the analysis...
Mismatch study of C-ADS main linac
MENG Cai, TANG Jing-Yu, PEI Shi-Lun, YAN Fang
2015, 39(9): 097002. doi: 10.1088/1674-1137/39/9/097002
Abstract:
The ADS accelerator in China is a Continuous-Wave (CW) proton linac with 1.5 GeV beam energy, 10 mA beam current, and 15 MW beam power. To meet the extremely low beam loss rate and high reliability requirements, it is very important to study the beam...
Injection performance evaluation for SSRF storage ring
YANG Yong, LENG Yong-Bin, YAN Ying-Bing, CHEN Zhi-Chu
2015, 39(9): 097003. doi: 10.1088/1674-1137/39/9/097003
Abstract:
The injection performance of the storage ring is one of the most important factors to consider at a synchrotron radiation facility, especially in the top-up mode. To evaluate the injection performance of the storage ring at the Shanghai Synchrotron R...