2016 Vol. 40, No. 7

Particles and Fields
Heavy-light mesons in a relativistic model
Jing-Bin Liu, Mao-Zhi Yang
2016, 40(7): 073101. doi: 10.1088/1674-1137/40/7/073101
Abstract:
We study the heavy-light mesons in a relativistic model, which is derived from the Bethe-Salpeter equation by applying the Foldy-Wouthuysen transformation to the heavy quark. The kernel we choose is based on scalar confinement and vector Coulomb pote...
Detection of supernova neutrinos at spallation neutron sources
Ming-Yang Huang, Xin-Heng Guo, Bing-Lin Young
2016, 40(7): 073102. doi: 10.1088/1674-1137/40/7/073102
Abstract:
After considering supernova shock effects, Mikheyev-Smirnov-Wolfenstein effects, neutrino collective effects, and Earth matter effects, the detection of supernova neutrinos at the China Spallation Neutron Source is studied and the expected numbers of...
Direct pion emission in D*+→D+π decays
Xing-Dao Guo, Xue-Wen Liu, Hong-Wei Ke, Xue-Qian Li
2016, 40(7): 073103. doi: 10.1088/1674-1137/40/7/073103
Abstract:
The QCD multipole expansion (QCDME) is based on quantum field theory and has been extensively applied to study transitions among Υ and ψ family members. As it refers to non-perturbative QCD, however, it has only a certain application range. Even thou...
Study of the rare decay J/ψ→e+e-φ
Xing-Dao Guo, Si-Run Xue, Hong-Wei Ke, Xue-Qian Li, Qiang Zhao
2016, 40(7): 073104. doi: 10.1088/1674-1137/40/7/073104
Abstract:
We study the decay process of J/ψ→e+e-φ where the relatively clean electromagnetic (EM) transitions appear at leading order at tree level while the hadronic contributions only emerge via hadronic loop transitions. We include the low-lying scalar f0(9...
ρ meson decays of heavy hybrid mesons
Liang Zhang, Peng-Zhi Huang
2016, 40(7): 073105. doi: 10.1088/1674-1137/40/7/073105
Abstract:
We calculate the ρ meson couplings between the heavy hybrid doublets Hh/Sh/Mh/Th and the ordinary qQ doublets in the framework of the light-cone QCD sum rule. The sum rules obtained rely mildly on the Borel parameters in their working regions. The re...
Diquark mass differences from unquenched lattice QCD
Yujiang Bi, Hao Cai, Ying Chen, Ming Gong, Zhaofeng Liu, Hao-Xue Qiao, Yi-Bo Yang
2016, 40(7): 073106. doi: 10.1088/1674-1137/40/7/073106
Abstract:
We calculate diquark correlation functions in the Landau gauge on the lattice using overlap valence quarks and 2+1-flavor domain wall fermion configurations. Quark masses are extracted from the scalar part of quark propagators in the Landau gauge. Th...
Nuclear Physics
Evolution of N=28 shell closure in relativistic continuum Hartree-Bogoliubov theory
Xue-Wei Xia
2016, 40(7): 074101. doi: 10.1088/1674-1137/40/7/074101
Abstract:
The N=28 shell gap in sulfur, argon, calcium and titanium isotopes is investigated in the framework of relativistic continuum Hartree-Bogoliubov (RCHB) theory. The evolutions of neutron shell gap, separation energy, single particle energy and pairing...
Influence of binding energies of electrons on nuclear mass predictions
Jing Tang, Zhong-Ming Niu, Jian-You Guo
2016, 40(7): 074102. doi: 10.1088/1674-1137/40/7/074102
Abstract:
Nuclear mass contains a wealth of nuclear structure information, and has been widely employed to extract the nuclear effective interactions. The known nuclear mass is usually extracted from the experimental atomic mass by subtracting the masses of el...
Spectra and electromagnetic transitions of 72-84Kr in the interacting boson model-1
Hong-Bo Bai, Xiao-Wei Li, Li-Jun Lü, Hong-Fei Dong, Yin Wang, Jin-Fu Zhang
2016, 40(7): 074103. doi: 10.1088/1674-1137/40/7/074103
Abstract:
Within the framework of the interacting boson model-1, the energy levels and electromagnetic transitions in 72-84Kr isotopes are calculated. The structures of the eigenstate and Hamiltonian matrix for some low-lying states are also calculated. The ca...
A combined model for pseudorapidity distributions in p-pcollisions at center-of-mass energies from 23.6 to 7000 GeV
Zhi-Jin Jiang, Yan Huang, Jie Wang
2016, 40(7): 074104. doi: 10.1088/1674-1137/40/7/074104
Abstract:
In p-p collisions, the charged particles produced consist of two leading particles and those frozen out from the hot and dense matter created in the collisions. The two leading particles are in the projectile and target fragmentation regions, respect...
Particle and Nuclear Astrophysics and Cosmology
Sensitivity study of (10,100) GeV gamma-ray bursts with double shower front events from ARGO-YBJ
Xun-Xiu Zhou, Lan-Lan Gao, Yu Zhang, Yi-Qing Guo, Qing-Qi Zhu, Huan-Yu Jia, Dai-Hui Huang
2016, 40(7): 075001. doi: 10.1088/1674-1137/40/7/075001
Abstract:
ARGO-YBJ, located at the Yangbajing Cosmic Ray Observatory (4300 m a.s.l., Tibet, China), is a full coverage air shower array, with an energy threshold of ~300 GeV for gamma-ray astronomy. Most of the recorded events are single front showers, satisfy...
Large angular scale CMB anisotropy from an excited initial mode
A. Sojasi, M. Mohsenzadeh, E. Yusofi
2016, 40(7): 075101. doi: 10.1088/1674-1137/40/7/075101
Abstract:
According to inflationary cosmology, the CMB anisotropy gives an opportunity to test predictions of new physics hypotheses. The initial state of quantum fluctuations is one of the important options at high energy scale, as it can affect observables s...
Detectors, Related Electronics and Experimental Methods
Upgrade of beam energy measurement system at BEPC-Ⅱ
Jian-Yong Zhang, Xiao Cai, Xiao-Hu Mo, Di-Zhou Guo, Jian-Li Wang, Bai-Qi Liu, M. N. Achasov, A. A. Krasnov, N. Yu. Muchnoi, E. E. Pyata, E. V. Mamoshkina, F. A. Harris
2016, 40(7): 076001. doi: 10.1088/1674-1137/40/7/076001
Abstract:
The beam energy measurement system is of great importance for both BEPC-Ⅱ accelerator and BES-Ⅲ detector. The system is based on measuring the energies of Compton back-scattered photons. In order to meet the requirements of data taking and improve th...
Study of a nTHGEM-based thermal neutron detector
Ke Li, Jian-Rong Zhou, Xiao-Dong Wang, Tao Xiong, Ying Zhang, Yu-Guang Xie, Liang Zhou, Hong Xu, Gui-An Yang, Yan-Feng Wang, Yan Wang, Jin-Jie Wu, Zhi-Jia Sun, Bi-Tao Hu
2016, 40(7): 076002. doi: 10.1088/1674-1137/40/7/076002
Abstract:
With new generation neutron sources, traditional neutron detectors cannot satisfy the demands of the applications, especially under high flux. Furthermore, facing the global crisis in 3He gas supply, research on new types of neutron detector as an al...
Prototype of readout electronics for the LHAASO KM2A electromagnetic particle detectors
Xiang Liu, Jing-Fan Chang, Zheng Wang, Lei Fan
2016, 40(7): 076101. doi: 10.1088/1674-1137/40/7/076101
Abstract:
The KM2A (one kilometer square extensive air shower array) is the largest detector array in the LHAASO (Large High Altitude Air Shower Observatory) project. The KM2A consists of 5242 EDs (Electromagnetic particle Detectors) and 1221 MDs (Muon Detecto...
Non-ideal effects of MOS capacitor in a switched capacitor waveform recorder ASIC
Hong-Yan Zhang, Zhi Deng, Yi-Nong Liu
2016, 40(7): 076102. doi: 10.1088/1674-1137/40/7/076102
Abstract:
SCAs (Switched Capacitor Arrays) have a wide range of uses, especially in high energy physics, nuclear science and astrophysics experiments. This paper presents a method of using a MOS capacitor as a sampling capacitor to gain larger capacitance with...
A capture-gated fast neutron detection method
Yi Liu, Yi-Gang Yang, Yang Tai, Zhi Zhang
2016, 40(7): 076201. doi: 10.1088/1674-1137/40/7/076201
Abstract:
To address the problem of the shortage of neutron detectors used in radiation portal monitors (RPMs), caused by the 3He supply crisis, research on a cadmium-based capture-gated fast neutron detector is presented in this paper. The detector is compose...
Spot size measurement of a flash-radiography source using the pinhole imaging method
Yi Wang, Qin Li, Nan Chen, Jin-Ming Cheng, Yu-Tong Xie, Yun-Long Liu, Quan-Hong Long
2016, 40(7): 076202. doi: 10.1088/1674-1137/40/7/076202
Abstract:
The spot size of the X-ray source is a key parameter of a flash-radiography facility, and is usually quoted as an evaluation of the resolving power. The pinhole imaging technique is applied to measure the spot size of the Dragon-I linear induction ac...
Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system
Qiang Zhao, Zhi-Yong He, Lei Yang, Xue-Ying Zhang, Wen-Juan Cui, Zhi-Qiang Chen, Hu-Shan Xu
2016, 40(7): 076203. doi: 10.1088/1674-1137/40/7/076203
Abstract:
In this paper, we study a monitoring method for neutron flux for the spallation target used in an accelerator driven sub-critical (ADS) system, where a spallation target located vertically at the centre of a sub-critical core is bombarded vertically ...
Development and prospects of Very Small Angle Neutron Scattering (VSANS) techniques
Tai-Sen Zuo, He Cheng, Yuan-Bo Chen, Fang-Wei Wang
2016, 40(7): 076204. doi: 10.1088/1674-1137/40/7/076204
Abstract:
Very Small Angle Neutron Scattering (VSANS) is an upgrade of the traditional Small Angle Neutron Scattering (SANS) technique which can cover three orders of magnitude of length scale from one nanometer to one micrometer. It is a powerful tool for str...
Accelerators
RETRACTED: High power acceleration of an HSC type injector for cancer therapy
Liang Lu, Toshiyuki Hattori, Huan-Yu Zhao, Katsunori Kawasaki, Lie-Peng Sun, Qian-Yu Jin, Jun-Jie Zhang, Liang-Ting Sun, Yuan He, Hong-Wei Zhao
2016, 40(7): 077001. doi: 10.1088/1674-1137/40/7/077001
Abstract:


This article has been retracted at the request of the Editor-in-Chief, in accordance with our policy on publishing ethics.

The article is largely a duplicate publication of a paper already published by the same authors in Physical Review Special Topic...
Improving nonlinear performance of the HEPS baseline design with a genetic algorithm
Yi Jiao
2016, 40(7): 077002. doi: 10.1088/1674-1137/40/7/077002
Abstract:
A baseline design for the High Energy Photon Source has been proposed, with a natural emittance of 60 pm·rad within a circumference of about 1.3 kilometers. Nevertheless, the nonlinear performance of the design needs further improvements to increase ...
Beam-based calibrations of the BPM offset at C-ADS Injector Ⅱ
Wei-Long Chen, Zhi-Jun Wang, Chi Feng, Wei-Ping Dou, Yue Tao, Huan Jia, Wang-Sheng Wang, Shu-Hui Liu, Yuan He
2016, 40(7): 077003. doi: 10.1088/1674-1137/40/7/077003
Abstract:
Beam-based BPM offset calibration was carried out for Injector Ⅱ at the C-ADS demonstration facility at the Institute of Modern Physics (IMP), Chinese Academy of Science (CAS). By using the steering coils integrated in the quadrupoles, the beam orbit...
Design and evaluation of a downconverter based on MicroTCA.4
Nan Gan, Rong Liu, Xin-Peng Ma, Yun-Long Chi
2016, 40(7): 077004. doi: 10.1088/1674-1137/40/7/077004
Abstract:
Modern low-level RF (LLRF) control systems of particle accelerators are designed to achieve extremely precise field amplitude and phase regulation inside the accelerating cavities. The RF field signal is usually converted to an intermediate frequency...
Other
Thermal stability and separation characteristics of anti-sticking layers of Pt/Cr films for the hot slumping technique
Shuang Ma, Ming-Wu Wen, Zhan-Shan Wang
2016, 40(7): 079001. doi: 10.1088/1674-1137/40/7/079001
Abstract:
The thermal stability and separation characteristics of anti-sticking layers of Pt/Cr films are studied in this paper. Several types of adhesion layers were investigated:10.0 nm Pt, 1.5 nm Cr+50.0 nm Pt, 2.5 nm Cr+50.0 nm Pt and 3.5 nm Cr+50.0 nm Pt ...

ISSN 1674-1137 CN 11-5641/O4

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