2016 Vol. 40, No. 11

Letters
Cluster decay of the high-lying excited states in 14C
Z. Y. Tian, Y. L. Ye, Z. H. Li, C. J. Lin, Q. T. Li, Y. C. Ge, J. L. Lou, W. Jiang, J. Li, Z. H. Yang, J. Feng, P. J. Li, J. Chen, Q. Liu, H. L. Zang, B. Yang, Y. Zhang, Z. Q. Chen, Y. Liu, X. H. Sun, J. Ma, H. M. Jia, X. X. Xu, L. Yang, N. R. Ma, L. J. Sun
2016, 40(11): 111001. doi: 10.1088/1674-1137/40/11/111001
Abstract:
A cluster-transfer experiment of 9Be(9Be,14C→α+10Be)α at an incident energy of 45 MeV was carried out in order to investigate the molecular structure in high-lying resonant states in 14C. This reaction is of extremely large Q-value, making it an exce...
Particles and Fields
Measurement of the absolute branching fraction of D+→K0e+ve via K0→π0π0
M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak, M. Albecht, D. J. Ambrose, A. Amoroso
2016, 40(11): 113001. doi: 10.1088/1674-1137/40/11/113001
Abstract:
By analyzing 2.93 fb-1 data collected at the center-of-mass energy √s=3.773 GeV with the BESIII detector, we measure the absolute branching fraction of the semileptonic decay D+K0e+ve to be B(D+K0e+ve)=(8.59±0.14±0.21)% using K0KS0→π0π0, where the...
Tuning and validation of hadronic event generator for R value measurements in the tau-charm region
Rong-Gang Ping, Xi-An Xiong, Lei Xia, Zhen Gao, Ying-Tian Li, Xing-Yu Zhou, Bing-Xin Zhang, Bo Zheng, Wen-Biao Yan, Hai-Ming Hu, Guang-Shun Huang
2016, 40(11): 113002. doi: 10.1088/1674-1137/40/11/113002
Abstract:
To measure the R value in an energy scan experiment with e+e- collisions, precise calculation of initial state radiation is required in the event generators. We present an event generator for this consideration, which incorporates initial state radia...
A mass reconstruction technique for a heavy resonance decaying to τ+τ-
Li-Gang Xia
2016, 40(11): 113003. doi: 10.1088/1674-1137/40/11/113003
Abstract:
For a resonance decaying to τ+τ-, it is difficult to reconstruct its mass accurately because of the presence of neutrinos in the decay products of the τ leptons. If the resonance is heavy enough, we show that its mass can be well determined by the mo...
Thermodynamic surface system of static black holes and area law
Ming Chen, Yong-Chang Huang
2016, 40(11): 113101. doi: 10.1088/1674-1137/40/11/113101
Abstract:
We propose a new picture of black holes through a special holographic screen. This holographic screen contains all the degrees of freedom of a black hole. We find that this holographic screen is similar to the ordinary thermodynamic surface system. M...
Gauge theory of massless spin-(3/2) field in de Sitter space-time
S. Parsamehr, M. Mohsenzadeh
2016, 40(11): 113102. doi: 10.1088/1674-1137/40/11/113102
Abstract:
On several levels of theoretical physics, especially particle physics and early universe cosmology, de Sitter space-time has become an attractive possibility. The principle of local gauge invariance governs all known fundamental interactions of eleme...
A possible interpretation of the Higgs mass by the cosmological attractive relaxion
Fa-Peng Huang, Yifu Cai, Hong Li, Xinmin Zhang
2016, 40(11): 113103. doi: 10.1088/1674-1137/40/11/113103
Abstract:
Recently, a novel idea [1] has been proposed to relax the electroweak hierarchy problem through the cosmological inflation and the axion periotic potential. Here, we further assume that only the attractive inflation is needed to explain the light mas...
SUSY effects in Higgs production at high energy e+e- colliders
null
2016, 40(11): 113104. doi: 10.1088/1674-1137/40/11/113104
Abstract:
Considering the constraints from collider experiments and dark matter detection, we investigate the SUSY effects in the Higgs production channels e+e-→Zh at an e+e- collider with a center-of-mass energy above 240 GeV and γγ→h→bb at a photon collider ...
Nuclear Physics
Self-consistent analysis of sub-barrier fusion enhancement effect in Ca+Ca and Ni+Ni
Nan-Ru Ma, Hui-Ming Jia, Cheng-Jian Lin, Lei Yang, Xin-Xing Xu, Li-Jie Sun, Feng Yang, Zhen-Dong Wu, Huan-Qiao Zhang, Zu-Hua Liu, Dong-Xi Wang
2016, 40(11): 114001. doi: 10.1088/1674-1137/40/11/114001
Abstract:
The fusion dynamic mechanism of heavy ions at energies near the Coulomb barrier is complicated and still not very clear up to now. Accordingly, a self-consistent method based on the CCFULL calculations has been developed and applied for an ongoing st...
An event mixing technique for Bose-Einstein correlations of two pions in photoproduction around 1 GeV
Qing-Hua He, H. Fujimurala, H. Fukasawa, R. Hashimoto, Y. Honda, T. Ishikawa, T. Iwata
2016, 40(11): 114002. doi: 10.1088/1674-1137/40/11/114002
Abstract:
We have developed an event mixing technique to observe Bose-Einstein correlations (BEC) between two identical neutral pions produced in photo-induced reactions in the non-perturbative QCD energy region. It is found that the missing-mass consistency c...
Investigation of the Mg isotopes using the shell-model-like approach in relativistic mean field theory
Hong-Bo Bai, Zhen-Hua Zhang, Xiao-Wei Li
2016, 40(11): 114101. doi: 10.1088/1674-1137/40/11/114101
Abstract:
Ground state properties for Mg isotopes, including binding energies, one- and two-neutron separation energies, pairing energies, nuclear matter radii and quadrupole deformation parameters, are obtained from the self-consistent relativistic mean field...
Application of Origen2.1 in the decay photon spectrum calculation of spallation products
Shuang Hong, Yong-Wei Yang, Hu-Shan Xu, Hai-Yan Meng, Lu Zhang, Zhao-Qing Liu, Yu-Cui Gao, Kang Chen
2016, 40(11): 114102. doi: 10.1088/1674-1137/40/11/114102
Abstract:
Origen2.1 is a widely used computer code for calculating the burnup, decay, and processing of radioactive materials. However, the nuclide library of Origen2.1 is used for existing reactors like pressurized water reactors. To calculate the photon spec...
Band head spin assignment of superdeformed bands in 86Zr
Anshul Dadwal, H. M. Mittal
2016, 40(11): 114103. doi: 10.1088/1674-1137/40/11/114103
Abstract:
Two parameter expressions for rotational spectra viz. variable moment of inertia (VMI), ab formula and three parameter Harris ω2 expansion are used to assign the band head spins (I0) of four rotational superdeformed bands in 86Zr. The least-squares f...
Radii of the bound states in 16N from the asymptotic normalization coefficients
E. T. Li, B. Guo, Z. H. Li, Y. B. Wang, Y. J. Li, Z. D. Wu, J. Su
2016, 40(11): 114104. doi: 10.1088/1674-1137/40/11/114104
Abstract:
The asymptotic normalization coefficients (ANCs) of the virtual decay 16N→15N+n are extracted from the 15N(7Li, 6Li)16N reaction populating the ground and first three excited states in 16N. The root-mean-square (rms) radii of the valence neutron in t...
Particle and Nuclear Astrophysics and Cosmology
On the contribution of a hard galactic plane component to the excesses of secondary particles
Yi-Qing Guo, Hong-Bo Hu, Zhen Tian
2016, 40(11): 115001. doi: 10.1088/1674-1137/40/11/115001
Abstract:
The standard model of cosmic ray propagation has been very successful in explaining all kinds of galactic cosmic ray spectra. However, high precision measurement have recently revealed an appreciable discrepancy between data and model expectations, f...
Detectors, Related Electronics and Experimental Methods
Alignment and measurement of the magnetic field for the BESIII muon counter
Qing Gao, Jing-Zhi Zhang, Chun-Hua Li, Jun-Hao Yin
2016, 40(11): 116001. doi: 10.1088/1674-1137/40/11/116001
Abstract:
Based on cosmic ray events without a magnetic field taken with the BESIII detector during the summer shutdown of BEPCII in 2012 and di-muon events from a data sample taken at center-of-mass energy of 3.686 GeV in 2009, we compare the coordinates of h...
Measurement of photoelectron yield of the CDEX-10 liquid argon detector prototype
Qing-Hao Chen, Qian Yue, Jian-Ping Cheng, Ke-Jun Kang, Yuan-Jing Li, Shin-Ted Lin, Chang-Jian Tang, Hao-Yang Xing, Xun-Zhen Yu, Ming Zeng, Jing-Jun Zhu
2016, 40(11): 116002. doi: 10.1088/1674-1137/40/11/116002
Abstract:
The China Dark Matter Experiment (CDEX) is a low background experiment at China Jinping Underground Laboratory (CJPL) designed to directly detect dark matter with a high-purity germanium (HPGe) detector. In the second phase, CDEX-10, which has a 10 k...
Environmental test of the BGO calorimeterfor DArk Matter Particle Explorer
Yi-Ming Hu, Jin Chang, Deng-Yi Chen, Jian-Hua Guo, Yun-Long Zhang, Chang-Qing Feng
2016, 40(11): 116003. doi: 10.1088/1674-1137/40/11/116003
Abstract:
DArk Matter Particle Explorer (DAMPE) is the first Chinese astronomical satellite, successfully launched on Dec. 17 2015. As the most important payload of DAMPE, the BGO calorimeter contains 308 bismuth germanate crystals, with 616 photomultiplier tu...
A multilayer ΔE-ER telescope for breakup reactions at energies around the Coulomb barrier
Nan-Ru Ma, Cheng-Jian Lin, Jian-Song Wang, Lei Yang, Dong-Xi Wang, Lei Zheng, Shi-Wei Xu, Li-Jie Sun, Hui-Ming Jia, Jun-Bing Ma, Peng Ma, Shi-Lun Jin, Zhen Bai, Yan-Yun Yang, Xin-Xing Xu, Gao-Long Zhang, Feng Yang, Jian-Jun He, Huan-Qiao Zhang, Zu-Hua Liu
2016, 40(11): 116004. doi: 10.1088/1674-1137/40/11/116004
Abstract:
The breakup reactions of weakly-bound nuclei at energies around the Coulomb barrier and the corresponding coupling effect on the other reaction channels are hot topics nowadays. To overcome the difficulty in identifying both heavier and lighter fragm...
Preliminary test results of LAr prototype detector
Pei-Xian Li, Meng-Yun Guan, Chang-Gen Yang, Peng Zhang, Jin-Chang Liu, Yong-Peng Zhang, Cong Guo, Yi Wang
2016, 40(11): 116005. doi: 10.1088/1674-1137/40/11/116005
Abstract:
Liquid argon (LAr) is an attractive target for the direct detection of WIMPs. A LAr prototype detector was designed to study the technology and properties of LAr detectors. The prototype detector had an active volume containing 0.65 kg of liquid argo...
Performance study of new style mosaic MRPC
Fu-Yue Wang, Yi Wang, Bo Xie, Dong Han, Peng-Fei Lü, Bao-Hong Guo, Yuan-Jing Li
2016, 40(11): 116006. doi: 10.1088/1674-1137/40/11/116006
Abstract:
The Compact Muon Solenoid (CMS) at LHC intends to use a high rate trapezoid MRPC for the muon system upgrade, but the size of the MRPC is limited by the dimensions of low resistivity glass. We have designed a prototype of a large MRPC in which the el...
Design of the readout electronics for the DAMPE Silicon Tracker detector
Fei Zhang, Wen-Xi Peng, Ke Gong, Di Wu, Yi-Fan Dong, Rui Qiao, Rui-Rui Fan, Jin-Zhou Wang, Huan-Yu Wang, Xin Wu, Daniel La, Philipp Azzarello, Valentina Gallo, Giovanni Ambrosi, Andrea Nardinocchi
2016, 40(11): 116101. doi: 10.1088/1674-1137/40/11/116101
Abstract:
The Silicon Tracker (STK) is one of the detectors of the DAMPE satellite used to measure the incidence direction of high energy cosmic rays. It consists of 6 X-Y double layers of silicon micro-strip detectors with 73728 readout channels. It is a grea...
A Flash-ADC data acquisition system developed for a drift chamber array and a digital filter algorithm for signal processing
Han Yi, Li-Ming Lü, Zhao Zhang, Wen-Jing Cheng, Wei Ji, Yan Huang, Yan Zhang, Hong-Jie Li, Yin-Ping Cui, Ming Lin, Yi-Jie Wang, Li-Min Duan, Rong-Jiang Hu, Zhi-Gang Xiao
2016, 40(11): 116102. doi: 10.1088/1674-1137/40/11/116102
Abstract:
A Flash-ADC data acquisition (DAQ) system has been developed for the drift chamber array designed for the External-Target-Experiment at the Cooling Storage Ring at the Heavy Ion Research Facility, Lanzhou. The simplified readout electronics system ha...
Design and simulation of a 12-bit, 40 MSPS asynchronous SAR ADC for the readout of PMT signals
Jian-Feng Liu, Lei Zhao, Jia-Jun Qin, Yun-Fan Yang, Li Yu, Yu Liang, Shu-Bin Liu, Qi An
2016, 40(11): 116103. doi: 10.1088/1674-1137/40/11/116103
Abstract:
High precision and large dynamic range measurement are required in the readout systems for the Water Cherenkov Detector Array (WCDA) in the Large High Altitude Air Shower Observatory (LHAASO). This paper presents a prototype of a 12-bit 40 MSPS Analo...
Accelerators
Physics design of collimators to reduce lost particle background at the CEPC
Teng Yue, Qing-Lei Xiu, Yi-Wei Wang, Zhe Duan, Qing Qin
2016, 40(11): 117001. doi: 10.1088/1674-1137/40/11/117001
Abstract:
At the CEPC (Circular Electron Positron Collider), which is proposed by the Chinese high energy physics community, the dominant background comes from radiative Bhabha scattering and the beamstrahlung effect according to preliminary research. Therefor...
Determination of internal-target thickness and experimental luminosity from beam energy loss at HIRFL-CSRe
Cao-Jie Shao, De-Yang Yu, Rong-Chun Lu, Tie-Cheng Zhao, Rui-Shi Mao, Jie Li, Ying-Li Xue, Wei Wang, Bian Yang, Ming-Wu Zhang, Jun-Liang Liu, Zhang-Yong Song, Xiao-Hong Cai, Xi-Meng Chen, Da-Yu Yin, Li-Jun Mao, Xiao-Dong Yang, Jian-Cheng Yang, You-Jin Yuan
2016, 40(11): 117002. doi: 10.1088/1674-1137/40/11/117002
Abstract:
The target thickness for nitrogen was determined from the beam energy loss in HIRFL-CSRe during the experimental study of the K-REC process in 197 MeV/u Xe54+-N2 collisions. Furthermore, the corresponding integrated luminosity of (1.15±0.06)×1030 cm-...
Secondary electron emission characteristics of graphene films with copper substrate
Jie Wang, Yong Wang, Yanhui Xu, Yuxin Zhang, Bo Zhang, Wei Wei
2016, 40(11): 117003. doi: 10.1088/1674-1137/40/11/117003
Abstract:
For modern and future circular accelerators, especially high-intensity proton synchrotrons or colliders, the electron cloud effect is a key issue. So, in order to reduce the electron cloud effect, exploring very low secondary electron yield (SEY) mat...
Simulation study on the emittance compensation of off-axis emitted beam in RF photoinjector
Rui-Xuan Huang, Chad Mitchell, Qi-Ka Jia, Christos Papadopoulos, Fernando Sannibale
2016, 40(11): 117004. doi: 10.1088/1674-1137/40/11/117004
Abstract:
To make full use of the photocathode material and improve its quantum efficiency lifetime, it can be necessary to operate the laser away from the cathode center in photoinjectors. In RF guns, the off-axis emitted beam will see a time-dependent RF eff...

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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