2007 Vol. 31, No. 6
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Abstract:
A method of determining the p-air inelastic cross section by measuring the directly arrived protons at high altitudes is presented. Its feasibility is studied via a Monte Carlo simulation. Assuming a KASCADE-like hadron calorimeter is set up at the c...
A method of determining the p-air inelastic cross section by measuring the directly arrived protons at high altitudes is presented. Its feasibility is studied via a Monte Carlo simulation. Assuming a KASCADE-like hadron calorimeter is set up at the c...
Abstract:
The strong coupling αs(s) is an important free parameter of Quantum Chromodynamics. Based on R values measured at BES, the values of the strong running coupling constant αs(s) at 2.0—3.7GeV are determined using the O(α3s) and O(α4s) order expressions...
The strong coupling αs(s) is an important free parameter of Quantum Chromodynamics. Based on R values measured at BES, the values of the strong running coupling constant αs(s) at 2.0—3.7GeV are determined using the O(α3s) and O(α4s) order expressions...
Abstract:
We study B(s)→φρ decays in a perturbative QCD approach based on kT factorization. In this approach, we calculate factorizable and non-factorizable contributions, there are no annihilation contributions due to quark content. We get the branching ratio...
We study B(s)→φρ decays in a perturbative QCD approach based on kT factorization. In this approach, we calculate factorizable and non-factorizable contributions, there are no annihilation contributions due to quark content. We get the branching ratio...
Abstract:
Within the RMF approach, considering the contribution of σ*,φ mesons and baryon octet {n,p,Λ,Σ－,Σ0,Σ+,Ξ－,Ξ0}, some properties of neutron star matter have been investigated in the temperature region between 5—15MeV. It is found that when the contribut...
Within the RMF approach, considering the contribution of σ*,φ mesons and baryon octet {n,p,Λ,Σ－,Σ0,Σ+,Ξ－,Ξ0}, some properties of neutron star matter have been investigated in the temperature region between 5—15MeV. It is found that when the contribut...
Abstract:
In proton-proton (p+p) collisions at √S=200GeV, it is found that the previously observed universal shape of transverse mass spectra of hadron production seems to break down into two species of baryons and mesons at higher transverse mass region. In o...
In proton-proton (p+p) collisions at √S=200GeV, it is found that the previously observed universal shape of transverse mass spectra of hadron production seems to break down into two species of baryons and mesons at higher transverse mass region. In o...
Abstract:
In the present work, the structures of the excited positive/negative-parity yrast states of 101Tc are discussed by using a projected shell model, and a band diagram calculated for the positive-parity yrast band is also shown in order to extract physi...
In the present work, the structures of the excited positive/negative-parity yrast states of 101Tc are discussed by using a projected shell model, and a band diagram calculated for the positive-parity yrast band is also shown in order to extract physi...
Abstract:
The variety of radioactivity and gamma intensity with time in uranium target of ISOL target-source system under irradiation by 100MeV, 200μA high intensity proton beams has been calculated by using three methods, and the results will provide some dos...
The variety of radioactivity and gamma intensity with time in uranium target of ISOL target-source system under irradiation by 100MeV, 200μA high intensity proton beams has been calculated by using three methods, and the results will provide some dos...
Abstract:
Based on parton model in QCD, at the leading-order approximation we studied the π0 spectra and nuclear modification factor RAA in Au+Au and Cu+Cu collisions with different centralities. Because of parton jet energy loss in heavy ion collision, large ...
Based on parton model in QCD, at the leading-order approximation we studied the π0 spectra and nuclear modification factor RAA in Au+Au and Cu+Cu collisions with different centralities. Because of parton jet energy loss in heavy ion collision, large ...
Abstract:
The shape phase transition between spherical U(5) and γ-unstable O(6) nuclei is investigated systemically for the nuclei in the A～130 region by the constrained relativistic mean field theory. By examining potential energy surfaces and neutron Fermi e...
The shape phase transition between spherical U(5) and γ-unstable O(6) nuclei is investigated systemically for the nuclei in the A～130 region by the constrained relativistic mean field theory. By examining potential energy surfaces and neutron Fermi e...
Abstract:
An Ultra Low Energy HPGe (ULE-HPGe) detector, with CsI (Tl) active shielding, is applied to the direct detection experiment for weakly interacting massive particles (WIMP), and located in Korea. The setups for the whole system and the calibration hav...
An Ultra Low Energy HPGe (ULE-HPGe) detector, with CsI (Tl) active shielding, is applied to the direct detection experiment for weakly interacting massive particles (WIMP), and located in Korea. The setups for the whole system and the calibration hav...
Abstract:
The tracking algorithm, MdcPatRec, is developed for the Drift Chamber of the BESⅢ detector using C++ language and object-oriented techniques. This algorithm uses a pattern matching method to find track segments and then combine them into track candid...
The tracking algorithm, MdcPatRec, is developed for the Drift Chamber of the BESⅢ detector using C++ language and object-oriented techniques. This algorithm uses a pattern matching method to find track segments and then combine them into track candid...
Abstract:
A prototype Time-of-Flight (TOF) detector, consisting of 28 Multi-gap Resistive Plate Chambers (MRPC), has been successfully operated at RHIC-STAR experiment since 2003. Extensive study on the calibration procedure of the MRPC-TOF is performed in ord...
A prototype Time-of-Flight (TOF) detector, consisting of 28 Multi-gap Resistive Plate Chambers (MRPC), has been successfully operated at RHIC-STAR experiment since 2003. Extensive study on the calibration procedure of the MRPC-TOF is performed in ord...
Abstract:
The light calibration system is one of the key components of Neutron Wall detector. It is used to calibrate the electronics and to monitor the long-term stability of the detector modules. With the detaile investigations, a calibration system with hig...
The light calibration system is one of the key components of Neutron Wall detector. It is used to calibrate the electronics and to monitor the long-term stability of the detector modules. With the detaile investigations, a calibration system with hig...
Abstract:
The frequency map analysis (FMA) method is systematically applied to the lattice of the BEPCⅡ storage ring for the first time in this paper. We compute characteristic parameters of the lattice with the Accelerator Toolbox (AT) code, in which the FMA ...
The frequency map analysis (FMA) method is systematically applied to the lattice of the BEPCⅡ storage ring for the first time in this paper. We compute characteristic parameters of the lattice with the Accelerator Toolbox (AT) code, in which the FMA ...
Abstract:
There are some differences between the single pulsed vacuum diode and the multi-pulsed vacuum diode. When vacuum diode is working under multi-pulsed mode, cathode plasma changes the designed condition inevitably. Formulas are presented in the paper t...
There are some differences between the single pulsed vacuum diode and the multi-pulsed vacuum diode. When vacuum diode is working under multi-pulsed mode, cathode plasma changes the designed condition inevitably. Formulas are presented in the paper t...
Abstract:
A new optical configuration of monochromator for X-ray imaging beamline, which allows one to obtain a parallel monochromatic beam with fixed exit by using two asymmetrically cut bent-crystals in Laue geometry, has been proposed. Based on the W14 mult...
A new optical configuration of monochromator for X-ray imaging beamline, which allows one to obtain a parallel monochromatic beam with fixed exit by using two asymmetrically cut bent-crystals in Laue geometry, has been proposed. Based on the W14 mult...
Abstract:
Using Mo/Si multilayers as the polarizer and analyzer, we have measured the state of polarization for 86—89eV of Beamline 3W1B at Beijing Synchrotron Radiation Facility (BSRF). From the obtained data, we have determined the polarization parameters of...
Using Mo/Si multilayers as the polarizer and analyzer, we have measured the state of polarization for 86—89eV of Beamline 3W1B at Beijing Synchrotron Radiation Facility (BSRF). From the obtained data, we have determined the polarization parameters of...
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