2016 Vol. 40, No. 4
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2016, 40(4): 041001. doi: 10.1088/1674-1137/40/4/041001
Abstract:
The Ω baryons with JP=3/2±, 1/2± are studied on the lattice in the quenched approximation. Their mass levels are ordered as M3/2+2-≈M1/2-1 /2+, as is expected from the constituent quark model. The mass values are also close to those of the four ...
The Ω baryons with JP=3/2±, 1/2± are studied on the lattice in the quenched approximation. Their mass levels are ordered as M3/2+
2016, 40(4): 042001. doi: 10.1088/1674-1137/40/4/042001
Abstract:
The last few years have been witness to a proliferation of new results concerning heavy exotic hadrons. Experimentally, many new signals have been discovered that could be pointing towards the existence of tetraquarks, pentaquarks, and other exotic c...
The last few years have been witness to a proliferation of new results concerning heavy exotic hadrons. Experimentally, many new signals have been discovered that could be pointing towards the existence of tetraquarks, pentaquarks, and other exotic c...
2016, 40(4): 043101. doi: 10.1088/1674-1137/40/4/043101
Abstract:
The D*D1(2420) and DD'*(2600) interactions are studied in a one-boson-exchange model. Isovector bound state solutions with spin parity JP=1+ are found from the D*D1(2420) interaction, which may be related to the observed charged charmonium-like state...
The D*D1(2420) and DD'*(2600) interactions are studied in a one-boson-exchange model. Isovector bound state solutions with spin parity JP=1+ are found from the D*D1(2420) interaction, which may be related to the observed charged charmonium-like state...
2016, 40(4): 043102. doi: 10.1088/1674-1137/40/4/043102
Abstract:
We classify the different phases by the "pole-zero mechanism" for a holographic fermionic system which contains a dipole coupling with strength p on a Q-lattice background. A complete phase structure in p space can be depicted in terms of Fermi liqui...
We classify the different phases by the "pole-zero mechanism" for a holographic fermionic system which contains a dipole coupling with strength p on a Q-lattice background. A complete phase structure in p space can be depicted in terms of Fermi liqui...
2016, 40(4): 045101. doi: 10.1088/1674-1137/40/4/045101
Abstract:
We establish a systematic algorithmic approach that generates new classes of solutions to the Einstein-Maxwell system in static spherically symmetric spacetime from well known uncharged solutions. A particular case is shown to satisfy all major physi...
We establish a systematic algorithmic approach that generates new classes of solutions to the Einstein-Maxwell system in static spherically symmetric spacetime from well known uncharged solutions. A particular case is shown to satisfy all major physi...
2016, 40(4): 045102. doi: 10.1088/1674-1137/40/4/045102
Abstract:
In some quantum gravity theories, a foamy structure of space-time may lead to Lorentz invariance violation(LIV). As the most energetic explosions in the Universe, gamma-ray bursts(GRBs) provide an effect way to probe quantum gravity effects. In this ...
In some quantum gravity theories, a foamy structure of space-time may lead to Lorentz invariance violation(LIV). As the most energetic explosions in the Universe, gamma-ray bursts(GRBs) provide an effect way to probe quantum gravity effects. In this ...
2016, 40(4): 045103. doi: 10.1088/1674-1137/40/4/045103
Abstract:
In this study, we research a higher dimensional flat Friedmann-Robertson-Walker(FRW) universe in Barber's second theory when strange quark matter(SQM) and normal matter(NM) are attached to the string cloud and domain walls. We obtain zero string tens...
In this study, we research a higher dimensional flat Friedmann-Robertson-Walker(FRW) universe in Barber's second theory when strange quark matter(SQM) and normal matter(NM) are attached to the string cloud and domain walls. We obtain zero string tens...
2016, 40(4): 046001. doi: 10.1088/1674-1137/40/4/046001
Abstract:
The non-uniformity effect of the inter-foil distance has been studied using a gaseous electron multiplication(GEM) detector with sensitive area of 50mm×50mm. A gradient of the inter-foil distance is introduced by using spacers with different heights ...
The non-uniformity effect of the inter-foil distance has been studied using a gaseous electron multiplication(GEM) detector with sensitive area of 50mm×50mm. A gradient of the inter-foil distance is introduced by using spacers with different heights ...
2016, 40(4): 046101. doi: 10.1088/1674-1137/40/4/046101
Abstract:
A new Digital Pulse Processing(DPP) module has been developed, based on a domino ring sampler version 4 chip(DRS4), with good time resolution for LaBr3 detectors, and different digital timing analysis methods for processing the raw detector signals a...
A new Digital Pulse Processing(DPP) module has been developed, based on a domino ring sampler version 4 chip(DRS4), with good time resolution for LaBr3 detectors, and different digital timing analysis methods for processing the raw detector signals a...
2016, 40(4): 046102. doi: 10.1088/1674-1137/40/4/046102
Abstract:
Beam measurement is very important for accelerators. In this paper, modern digital beam measurement techniques based on IQ(In-phase & Quadrature-phase) analysis are discussed. Based on this method and high-speed high-resolution analog-to-digital conv...
Beam measurement is very important for accelerators. In this paper, modern digital beam measurement techniques based on IQ(In-phase & Quadrature-phase) analysis are discussed. Based on this method and high-speed high-resolution analog-to-digital conv...
2016, 40(4): 046103. doi: 10.1088/1674-1137/40/4/046103
Abstract:
Embedded RAM blocks(BRAMs) in field programmable gate arrays(FPGAs) are susceptible to single event effects(SEEs) induced by environmental factors such as cosmic rays, heavy ions, alpha particles and so on. As technology scales, the issue will be mor...
Embedded RAM blocks(BRAMs) in field programmable gate arrays(FPGAs) are susceptible to single event effects(SEEs) induced by environmental factors such as cosmic rays, heavy ions, alpha particles and so on. As technology scales, the issue will be mor...
2016, 40(4): 046201. doi: 10.1088/1674-1137/40/4/046201
Abstract:
Ray effects are an inherent problem of the discrete ordinates method. RAY3D, a functional module of ARES, which is a discrete ordinates code system, employs a semi-analytic first collision source method to mitigate ray effects. This method decomposes...
Ray effects are an inherent problem of the discrete ordinates method. RAY3D, a functional module of ARES, which is a discrete ordinates code system, employs a semi-analytic first collision source method to mitigate ray effects. This method decomposes...
2016, 40(4): 046202. doi: 10.1088/1674-1137/40/4/046202
Abstract:
Energy calibration of resistive charge division-based position-sensitive silicon detectors is achieved by parabolic fitting in the traditional method, where the systematic variations of vertex and curvature of the parabola with energy must be conside...
Energy calibration of resistive charge division-based position-sensitive silicon detectors is achieved by parabolic fitting in the traditional method, where the systematic variations of vertex and curvature of the parabola with energy must be conside...
2016, 40(4): 047001. doi: 10.1088/1674-1137/40/4/047001
Abstract:
The project of a 10 MeV PET cyclotron accelerator for medical diagnosis and treatment was started at Amirkabir University of Technology in 2012. The low-level RF system of the cyclotron accelerator is designed to stabilize acceleration voltage and co...
The project of a 10 MeV PET cyclotron accelerator for medical diagnosis and treatment was started at Amirkabir University of Technology in 2012. The low-level RF system of the cyclotron accelerator is designed to stabilize acceleration voltage and co...
2016, 40(4): 047002. doi: 10.1088/1674-1137/40/4/047002
Abstract:
The fast extraction kicker system is one of the most important accelerator components and the main source of impedance in the Rapid Cycling Synchrotron of the China Spallation Neutron Source. It is necessary to understand the kicker impedance before ...
The fast extraction kicker system is one of the most important accelerator components and the main source of impedance in the Rapid Cycling Synchrotron of the China Spallation Neutron Source. It is necessary to understand the kicker impedance before ...
2016, 40(4): 047003. doi: 10.1088/1674-1137/40/4/047003
Abstract:
A kicker control system is used for beam extraction and injection between two cooling storage rings(CSRs) at the Heavy Ion Research Facility in Lanzhou(HIRFL). To meet the requirements of special physics experiments, the kicker controller has been up...
A kicker control system is used for beam extraction and injection between two cooling storage rings(CSRs) at the Heavy Ion Research Facility in Lanzhou(HIRFL). To meet the requirements of special physics experiments, the kicker controller has been up...
2016, 40(4): 047004. doi: 10.1088/1674-1137/40/4/047004
Abstract:
A logarithm processing algorithm to measure beam transverse size and position is proposed and preliminary experimental results in Hefei Light Source Ⅱ(HLS Ⅱ) are given. The algorithm is based on only 4 successive channels of 16 anode channels of mult...
A logarithm processing algorithm to measure beam transverse size and position is proposed and preliminary experimental results in Hefei Light Source Ⅱ(HLS Ⅱ) are given. The algorithm is based on only 4 successive channels of 16 anode channels of mult...
2016, 40(4): 047005. doi: 10.1088/1674-1137/40/4/047005
Abstract:
Central RF frequency is a key parameter of storage rings. This paper presents the measurement of central RF frequency of the HLS-Ⅱ storage ring with the sextupole modulation method. Firstly, the basis of central RF frequency measurement of the electr...
Central RF frequency is a key parameter of storage rings. This paper presents the measurement of central RF frequency of the HLS-Ⅱ storage ring with the sextupole modulation method. Firstly, the basis of central RF frequency measurement of the electr...
2016, 40(4): 048001. doi: 10.1088/1674-1137/40/4/048001
Abstract:
A new technique has been developed for direct measurement of the differential X-ray absorption fine structure(XAFS) spectrum by the energy-modulation method. To acquire the energy-oscillating incident X-ray beam, a piezoelectric actuator is used to c...
A new technique has been developed for direct measurement of the differential X-ray absorption fine structure(XAFS) spectrum by the energy-modulation method. To acquire the energy-oscillating incident X-ray beam, a piezoelectric actuator is used to c...
2016, 40(4): 048101. doi: 10.1088/1674-1137/40/4/048101
Abstract:
Due to high reflectivity and high resolution of X-ray pulses, diamond is one of the most popular Bragg crystals serving as the reflecting mirror and mono-chromator in the next generation of free electron lasers(FELs). The energy deposition of X-rays ...
Due to high reflectivity and high resolution of X-ray pulses, diamond is one of the most popular Bragg crystals serving as the reflecting mirror and mono-chromator in the next generation of free electron lasers(FELs). The energy deposition of X-rays ...
2016, 40(4): 048201. doi: 10.1088/1674-1137/40/4/048201
Abstract:
Dual-energy X-ray absorptiometry(DEXA) has been widely applied to measure the bone mineral density(BMD) and soft-tissue composition of the human body. However, the use of DEXA is greatly limited for low-Z materials such as soft tissues due to their w...
Dual-energy X-ray absorptiometry(DEXA) has been widely applied to measure the bone mineral density(BMD) and soft-tissue composition of the human body. However, the use of DEXA is greatly limited for low-Z materials such as soft tissues due to their w...
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ISSN 1674-1137 CN 11-5641/O4
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- Cosmology
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