2014 Vol. 38, No. 3

Revisiting the Kπ puzzle in the pQCD factorization approach
BAI Wei, LIU Min, FAN Ying-Ying, WANG Wen-Fei, CHENG Shan, XIAO Zhen-Jun
2014, 38(3): 033101. doi: 10.1088/1674-1137/38/3/033101
Abstract:
In this paper, we calculated the branching ratios and direct CP violation of the four B→Kπ decays with the inclusion of all currently known next-to-leading order (NLO) contributions by employing the perturbative QCD (pQCD) factorization approach. We ...
Particle and field theory
Duffin-Kemmer-Petiau equation under Hartmann ring-shaped potential
M. Kamali, Z. Molaee, S. Zarrinkamar
2014, 38(3): 033102. doi: 10.1088/1674-1137/38/3/033102
Abstract:
We solve the Duffin-Kemmer-Petiau (DKP) equation in the presence of Hartmann ring-shaped potential in (3+1)-dimensional space-time. We obtain the energy eigenvalues and eigenfunctions by the Nikiforov-Uvarov (NU) method.
Off-shell superpotentials and Ooguri-Vafa invariants of type Ⅱ/F theory compactification
XU Feng-Jun, YANG Fu-Zhong
2014, 38(3): 033103. doi: 10.1088/1674-1137/38/3/033103
Abstract:
In this paper, we calculate the off-shell superpotential of two Calabi-Yau manifolds with three parameters by integrating the period of the subsystem. We also obtain the Ooguri-Vafa invariants with open mirror symmetry.
Nuclear
Systematic analysis of fusion barrier heights and positions for proton projectiles using the single folding model
YANG Jie-Cheng, ZHANG Gao-Long, PANG Dan-Yang
2014, 38(3): 034101. doi: 10.1088/1674-1137/38/3/034101
Abstract:
The nuclear potentials between protons and different target nuclei are calculated by using the single folding model with the density-dependent nucleon-nucleon interaction. The fusion barrier heights and positions for proton projectiles fusing with di...
Study of 3He inelastic scattering on 13C and 14C at 37.9 MeV
A. Attia, F. A. El-Akkad, A. M. Abdel-Moneim
2014, 38(3): 034102. doi: 10.1088/1674-1137/38/3/034102
Abstract:
The differential cross sections of elastic and inelastic scattering of 3He ions on 13C and 14C have been studied at an energy of 37.9 MeV with a double folding model based on M3Y-Reid effective nucleon-nucleon interaction. The resulted parameters hav...
particle and nuclear astrophysics and cosmology
Study of n-γ discrimination in low energy range (above 40 keVee) by charge comparison method with a BC501A liquid scintillation detector
CHEN Yong-Hao, CHEN Xi-Meng, ZHANG Xiao-Dong, LEI Jia-Rong, AN Li, SHAO Jian-Xiong, ZHENG Pu, WANG Xin-Hua, ZHU Chuan-Xin, HE Tie, YANG Jian
2014, 38(3): 036001. doi: 10.1088/1674-1137/38/3/036001
Abstract:
A VME-based experiment system for n-γ discrimination using the charge comparison method was established. A data acquisition program for controlling the programmable modules and processing data online via VME64X bus was developed through the use of La...
Design and performances of electromagnetic particle detector for LHAASO-KM2A
ZHAO Jing, LIU Jia, SHENG Xiang-Dong, HE Hui-Hai, GUO Yi-Qing, HOU Chao, LÜ Hong-Kui
2014, 38(3): 036002. doi: 10.1088/1674-1137/38/3/036002
Abstract:
In the Large High Altitude Air Shower Observatory (LHAASO) project, the one kilometer square extensive air shower array (KM2A) is the the largest detector array in terms of effective area. It consists of 5635 electromagnetic particle detectors (EDs) ...
Measurement of X-ray photon energy and arrival time using a silicon drift detector
LIU Li, YU Hai, ZHENG Wei
2014, 38(3): 036003. doi: 10.1088/1674-1137/38/3/036003
Abstract:
Detecting the X-ray emission of pulsars and obtaining the photons' time of arrival are the foundational steps in autonomous navigation via X-ray pulsar measurement. The precision of a pulse's time of arrival is mainly determined by the precision of p...
A capacitance servo control plunger for accurate lifetime measurement
WANG Jin-Long, WU Xiao-Guang, HE Chuang-Ye, LI Guang-Sheng, FAN Qi-Wen, DU Ying-Hui, WU Yi-Heng, HU Shi-Peng, ZHENG Yun, LI Cong-Bo, LI Hong-Wei, LIU Jia-Jian, LUO Peng-Wei, YAO Shun-He
2014, 38(3): 036201. doi: 10.1088/1674-1137/38/3/036201
Abstract:
The recoil distance Doppler shift method has been widely used in the study of nuclear structure to determine the level lifetime and absolute transition probabilities. A capacitance servo control plunger based on this method has been successfully deve...
Digital discrimination of neutron and γ ray using an organic scintillation detector based on wavelet transform modulus maximum
YANG Yun, LIU Guo-Fu, YANG Jun, LUO Xiao-Liang, MENG De-Yuan
2014, 38(3): 036202. doi: 10.1088/1674-1137/38/3/036202
Abstract:
A novel algorithm for the discrimination of neutron and γ -ray events with wavelet transform modulus maximum (WTMM) in an organic scintillation has been investigated. Voltage pulses arising from a BC501A organic liquid scintillation detector in a mix...
Accelerator
Design of SC solenoid with high homogeneity
YANG Xiao-Liang, LIU Zhong, LUO Min, LUO Guang-Yao, KANG Qiang, TAN Jie, WU Wei
2014, 38(3): 037001. doi: 10.1088/1674-1137/38/3/037001
Abstract:
A novel kind of SC (superconducting) solenoid coil is designed to satisfy the homogeneity requirement of the magnetic field. In this paper, we first calculate the current density distribution of the solenoid coil section through the linear programmin...
Physical design of superconducting magnet for ADS injection Ⅰ
PENG Quan-Ling, WANG Bing, CHEN Yuan, YANG Xiang-Chen
2014, 38(3): 037002. doi: 10.1088/1674-1137/38/3/037002
Abstract:
A superconducting solenoid prototype magnet for Accelerator Driven Subcritical System (ADS) Injection Ⅰ has been designed and fabricated, which has also been tested in a liquid Helium state inside a vertical Dewar in the Haerbin institute of Technolo...
A waveguide overloaded cavity kicker for the HLSⅡ longitudinal feedback system
LI Wu-Bin, ZHOU Ze-Ran, SUN Bao-Gen, WU Fang-Fang, XU Wei, LU Ping, YANG Yong-Liang
2014, 38(3): 037003. doi: 10.1088/1674-1137/38/3/037003
Abstract:
In the upgrade project of Hefei Light Source (HLSⅡ), a new digital longitudinal bunch-by-bunch feedback system will be developed to suppress the coupled bunch instabilities in the storage ring effectively. We design a new waveguide overloaded cavity ...
Optimization of the lattice function in the planar undulator applied for terahertz FEL oscillators
YANG Lei, QIN Bin, YANG Jun, LIU Xia-Ling, TAN Ping, HU Tong-Ning
2014, 38(3): 037004. doi: 10.1088/1674-1137/38/3/037004
Abstract:
Since the beta function of the electron beam within the undulator has a great influence on the power gain of the free electron laser (FEL), optimization of the undulator lattice becomes important. In this paper, the transfer matrix of the planar undu...
Beam dynamics study of RFQ for CADS with a 3D space-charge-effect
LI Chao, ZHANG Zhi-Lei, QI Xin, XU Xian-Bo, HE Yuan, YANG Lei
2014, 38(3): 037005. doi: 10.1088/1674-1137/38/3/037005
Abstract:
The ADS (accelerator driven subcritical system) project was proposed by the Chinese Academy of Sciences. The initial proton beams delivered from an electron cyclotron resonance ion source can be effectively accelerated by 162.5 MHz 4.2 m long room te...
Synchrotron radiation,applications of nuclear techniquees,etc
In-situ EXAFS study on the thermal decomposition of TiH2
ZHOU Ying-Li, ZHENG Li-Rong, CHU Sheng-Qi, WU Min, AN Peng-Fei, ZHANG Jing, HU Tian-Dou
2014, 38(3): 038001. doi: 10.1088/1674-1137/38/3/038001
Abstract:
Thermal decomposition behaviors of TiH2 powder under a owing helium atmosphere and in a low vac- uum condition have been studied using an in situ EXAFS technique. By an EXAFS analysis containing the multiple scattering paths including H atoms, the ch...
Experimental measurement of radiation dose in a dedicated breast CT system
SHEN Shan-Wei, WANG Yan-Fang, SHU Hang, TANG Xiao, WEI Cun-Feng, SONG Yu-Shou, SHI Rong-Jian, WEI Long
2014, 38(3): 038201. doi: 10.1088/1674-1137/38/3/038201
Abstract:
Radiation dose is an important performance indicator of a dedicated breast CT (DBCT). In this paper, the method of putting thermoluminescent dosimeters (TLD) into a breast shaped PMMA phantom to study the dose distribution in breasts was improved by ...

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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