2007 Vol. 31, No. 10
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Abstract:
The errors and correlations of BESIII TOF measurements are carefully checked in hit position at z partitions with the electron-pair events. The measured time-of-flight's and their covariance matrices are subjected to a correlation analysis algorithm ...
The errors and correlations of BESIII TOF measurements are carefully checked in hit position at z partitions with the electron-pair events. The measured time-of-flight's and their covariance matrices are subjected to a correlation analysis algorithm ...
Abstract:
Based on the low-energy effective Hamiltonian with generalized QCD factorization, we calculate the new physics contributions to Bd0→φK*0 polarization anomaly and Bd→φKS CP asymmetry induced by the neutral Higgs bosons H0, h0 and A0 of the two Higgs d...
Based on the low-energy effective Hamiltonian with generalized QCD factorization, we calculate the new physics contributions to Bd0→φK*0 polarization anomaly and Bd→φKS CP asymmetry induced by the neutral Higgs bosons H0, h0 and A0 of the two Higgs d...
Abstract:
The 3-jet events are produced by Monte Carlo simulation Jetset7.4 in e+e－ collisions at s=91.2GeV. After introducing the cone angle of jets, we carefully studied the characters of the angular distributions of quark jets and gluon jets with different ...
The 3-jet events are produced by Monte Carlo simulation Jetset7.4 in e+e－ collisions at s=91.2GeV. After introducing the cone angle of jets, we carefully studied the characters of the angular distributions of quark jets and gluon jets with different ...
Abstract:
The second order self-energies of hadrons are calculated from S2 matrix, and then an effective method to solve nuclear many-body problems is summarized. In addition, the density-dependent relativistic many body methods are discussed.
The second order self-energies of hadrons are calculated from S2 matrix, and then an effective method to solve nuclear many-body problems is summarized. In addition, the density-dependent relativistic many body methods are discussed.
Abstract:
By including the scalar isovector meson δ, we extend the relativistic mean field model and the one-boson exchange model of changing K-meson in the framework of Schaffner's relativistic mean field model. We re-consider the coupling constants for the i...
By including the scalar isovector meson δ, we extend the relativistic mean field model and the one-boson exchange model of changing K-meson in the framework of Schaffner's relativistic mean field model. We re-consider the coupling constants for the i...
Abstract:
GEM, which has rapidly been developed in recent years as a new type of gas detector, has advantages of high position resolution and counting rate with a wide potential application in particle physics and X-ray imaging and etc. One of the key techniqu...
GEM, which has rapidly been developed in recent years as a new type of gas detector, has advantages of high position resolution and counting rate with a wide potential application in particle physics and X-ray imaging and etc. One of the key techniqu...
Abstract:
The response of three semiconductor materials, polycrystalline HgI2, amorphous Se and polycrystalline CdTe, used for large area direct conversion detectors, is simulated by Monte Carlo method for X-ray photons in the diagnostic energy range (10—100ke...
The response of three semiconductor materials, polycrystalline HgI2, amorphous Se and polycrystalline CdTe, used for large area direct conversion detectors, is simulated by Monte Carlo method for X-ray photons in the diagnostic energy range (10—100ke...
Abstract:
We have investigated the performance of a EXOGAM-Segmented-Clover with 16 segments as a Compton polarimeter to measure the linear polarization of gamma rays. The polarization sensitivity of the Clover detector has been measured at the energy of 1332k...
We have investigated the performance of a EXOGAM-Segmented-Clover with 16 segments as a Compton polarimeter to measure the linear polarization of gamma rays. The polarization sensitivity of the Clover detector has been measured at the energy of 1332k...
Abstract:
The China Spallation Neutron Source (CSNS) accelerators consist of an 80MeV proton linac, and a 1.6GeV rapid cycling synchrotron. The ring accumulates 1.88×1013 protons via H－ stripping injection in the phase CSNS-Ⅰ. The injected beam is painted into...
The China Spallation Neutron Source (CSNS) accelerators consist of an 80MeV proton linac, and a 1.6GeV rapid cycling synchrotron. The ring accumulates 1.88×1013 protons via H－ stripping injection in the phase CSNS-Ⅰ. The injected beam is painted into...
Abstract:
Small-angle multiple intrabeam scattering (IBS) is an important effect for heavy-ion storage rings with electron cooling, because the cooling time is determined by the equilibrium between cooling and IBS process. All usually used numerical algorithms...
Small-angle multiple intrabeam scattering (IBS) is an important effect for heavy-ion storage rings with electron cooling, because the cooling time is determined by the equilibrium between cooling and IBS process. All usually used numerical algorithms...
Abstract:
The PKU-SCAF comprises three RF units: the 1.5cell injector which is developed all by ourselves, the upgraded 3.5cell injector, and the 1.3GHz 2×9cell Telsa style main accelerator. To take full advantage of the high quality electron beam of PKU-SCAF,...
The PKU-SCAF comprises three RF units: the 1.5cell injector which is developed all by ourselves, the upgraded 3.5cell injector, and the 1.3GHz 2×9cell Telsa style main accelerator. To take full advantage of the high quality electron beam of PKU-SCAF,...
Abstract:
Resistive wall instability is a serious problem in many light sources. An active transverse feedback system (TFS) is required to operate the machine in a good condition when beam current is high. In order to investigate beam dynamics with TFS turned ...
Resistive wall instability is a serious problem in many light sources. An active transverse feedback system (TFS) is required to operate the machine in a good condition when beam current is high. In order to investigate beam dynamics with TFS turned ...
Abstract:
The design of LLRF control system for the 100MeV cyclotron has been presented together with the desktop experiment and its result. In the experiment, the feasibility of the digital control is validated for amplitude and phase close loop operation in ...
The design of LLRF control system for the 100MeV cyclotron has been presented together with the desktop experiment and its result. In the experiment, the feasibility of the digital control is validated for amplitude and phase close loop operation in ...
Abstract:
A monolithic capillary half focusing X-ray lens (MCHFXRL) is used to focus the synchrotron radiation. The magnitudes of the focal spot size and gain of the synchrotron radiation microbeam focused by the MCHFXRL are in the orders of 10μm and 103, resp...
A monolithic capillary half focusing X-ray lens (MCHFXRL) is used to focus the synchrotron radiation. The magnitudes of the focal spot size and gain of the synchrotron radiation microbeam focused by the MCHFXRL are in the orders of 10μm and 103, resp...
Abstract:
The content of Bacillus substilis var. niger (ATCC 9372) DNA double-strand breaks induced by neutron radiation at different doses and different dose rates respectively, was measured and quantified by pulsed-field gel electrophoresis. By the analyses ...
The content of Bacillus substilis var. niger (ATCC 9372) DNA double-strand breaks induced by neutron radiation at different doses and different dose rates respectively, was measured and quantified by pulsed-field gel electrophoresis. By the analyses ...
Abstract:
The preparation and accelerator mass spectrometry (AMS) measurements of a series of 182Hf AMS calibration standards are described in this paper. The preparation consists of five processes, the synthesis of the initial 182Hf/180Hf standard sample by d...
The preparation and accelerator mass spectrometry (AMS) measurements of a series of 182Hf AMS calibration standards are described in this paper. The preparation consists of five processes, the synthesis of the initial 182Hf/180Hf standard sample by d...
Abstract:
Diffraction-enhanced X-ray imaging could extract accurately the refraction angles of the sample, which is very important to increase the image contrast of low Z samples. In this paper, the DEI experiments with X-rays of different energies were perfor...
Diffraction-enhanced X-ray imaging could extract accurately the refraction angles of the sample, which is very important to increase the image contrast of low Z samples. In this paper, the DEI experiments with X-rays of different energies were perfor...
Abstract:
We study the global bipartite entanglement of the three-qubit Heisenberg XXX spin chain with impurity. Through calculating the negativities N1-23 and N12-3, we show that the critical temperature Tc above which the entanglement vanishes increases with...
We study the global bipartite entanglement of the three-qubit Heisenberg XXX spin chain with impurity. Through calculating the negativities N1-23 and N12-3, we show that the critical temperature Tc above which the entanglement vanishes increases with...
Abstract:
The recent theoretical and experimental progresses in hypernuclear physics are reviewed. According to the specifications of CSR in Lanzhou, the possible study of hypernuclear physics is suggested.
The recent theoretical and experimental progresses in hypernuclear physics are reviewed. According to the specifications of CSR in Lanzhou, the possible study of hypernuclear physics is suggested.
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