2012 Vol. 36, No. 10
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2012, 36(10): 915-925. doi: 10.1088/1674-1137/36/10/001
Abstract:
The number of J/ψ events collected with the BES0 detector at the BEPC/ from June 12 to July 28, 2009 is determined to be (225:3±2:8)×106 using J/ψ → inclusive events, where the uncertainty is the systematic error and the statistical one is negligible...
The number of J/ψ events collected with the BES0 detector at the BEPC/ from June 12 to July 28, 2009 is determined to be (225:3±2:8)×106 using J/ψ → inclusive events, where the uncertainty is the systematic error and the statistical one is negligible...
2012, 36(10): 926-931. doi: 10.1088/1674-1137/36/10/002
Abstract:
Study of the rare and forbidden decays of η/η' offers a sensitive probe to test fundamental symmetries of quantum chromodynamics and search for new physics beyond the Standard Model. To study the rare decays of η/η' to π+π-e+e-, π+π-μ+μ- and e+e-μ+μ-...
Study of the rare and forbidden decays of η/η' offers a sensitive probe to test fundamental symmetries of quantum chromodynamics and search for new physics beyond the Standard Model. To study the rare decays of η/η' to π+π-e+e-, π+π-μ+μ- and e+e-μ+μ-...
2012, 36(10): 932-940. doi: 10.1088/1674-1137/36/10/003
Abstract:
Recently, the LHCb experiment announced 3.5σ evidence for direct CP violation in D0 decay by looking at the difference between ACP(D0→K+K-) and ACP(D0→π+π-). This is the rst evidence of CP violation in a charm system, which may indicate new physics b...
Recently, the LHCb experiment announced 3.5σ evidence for direct CP violation in D0 decay by looking at the difference between ACP(D0→K+K-) and ACP(D0→π+π-). This is the rst evidence of CP violation in a charm system, which may indicate new physics b...
2012, 36(10): 941-946. doi: 10.1088/1674-1137/36/10/004
Abstract:
We present a phenomenological analysis of the space- and time-like charged kaon electromagnetic form factors in factorized perturbative QCD (pQCD) by employing an analytic model for αs(Q2) and an infrared (IR) finite gluon propagator. In the space-li...
We present a phenomenological analysis of the space- and time-like charged kaon electromagnetic form factors in factorized perturbative QCD (pQCD) by employing an analytic model for αs(Q2) and an infrared (IR) finite gluon propagator. In the space-li...
2012, 36(10): 947-953. doi: 10.1088/1674-1137/36/10/005
Abstract:
We present a modified version of quark mass scaling via considering the important one-gluon-exchange interaction between quarks in the quark mass density-dependent model. The properties of strange quark matter and the structure of strange stars are t...
We present a modified version of quark mass scaling via considering the important one-gluon-exchange interaction between quarks in the quark mass density-dependent model. The properties of strange quark matter and the structure of strange stars are t...
2012, 36(10): 954-957. doi: 10.1088/1674-1137/36/10/006
Abstract:
For precision delivery of the Bragg peak of a heavy-ion beam to a target volume in ion beam therapy, it is necessary to know the tissue stopping power. A general approach to solve this problem in ion beam therapy is to convert X-ray CT (computed tomo...
For precision delivery of the Bragg peak of a heavy-ion beam to a target volume in ion beam therapy, it is necessary to know the tissue stopping power. A general approach to solve this problem in ion beam therapy is to convert X-ray CT (computed tomo...
2012, 36(10): 958-963. doi: 10.1088/1674-1137/36/10/007
Abstract:
The candidate chiral doublet bands in 98Tc with configuration πg9/2 × νh11/2 are studied theoretically for the first time via the triaxial particle rotor model. The main properties of the doublet bands including the energy spectra and electromagnetic...
The candidate chiral doublet bands in 98Tc with configuration πg9/2 × νh11/2 are studied theoretically for the first time via the triaxial particle rotor model. The main properties of the doublet bands including the energy spectra and electromagnetic...
2012, 36(10): 964-966. doi: 10.1088/1674-1137/36/10/008
Abstract:
We know that the ground state energy, half-life, spin and parity of the heavy nuclei can be determined via the study of alpha decay. Bearing this in mind, we have calculated the penetration probability in the barrier, the decay constant and thereby t...
We know that the ground state energy, half-life, spin and parity of the heavy nuclei can be determined via the study of alpha decay. Bearing this in mind, we have calculated the penetration probability in the barrier, the decay constant and thereby t...
2012, 36(10): 967-972. doi: 10.1088/1674-1137/36/10/009
Abstract:
We investigate the neutron and proton single particle (s.p.) potentials of asymmetric nuclear matter and their isospin dependence in various spin-isospin ST channels within the framework of the Brueckner-Hartree-Fock approach. It is shown that in sym...
We investigate the neutron and proton single particle (s.p.) potentials of asymmetric nuclear matter and their isospin dependence in various spin-isospin ST channels within the framework of the Brueckner-Hartree-Fock approach. It is shown that in sym...
2012, 36(10): 973-978. doi: 10.1088/1674-1137/36/10/010
Abstract:
This work aims at developing compact readout electronics for a compact imaging detector module with silicon photomultiplier (SPM) array. The detector module consists of a LYSO crystal array coupling with a SensL's 4×4 SPM array. A compact multiplexed...
This work aims at developing compact readout electronics for a compact imaging detector module with silicon photomultiplier (SPM) array. The detector module consists of a LYSO crystal array coupling with a SensL's 4×4 SPM array. A compact multiplexed...
2012, 36(10): 979-984. doi: 10.1088/1674-1137/36/10/011
Abstract:
In the LHC experiment, the H→γγ channel provides a clean nal state with an effective mass peak that is reconstructed with great precision, despite the small branching ratio. As a consequence, the H→γγ channel is one of the most promising channels for...
In the LHC experiment, the H→γγ channel provides a clean nal state with an effective mass peak that is reconstructed with great precision, despite the small branching ratio. As a consequence, the H→γγ channel is one of the most promising channels for...
2012, 36(10): 985-990. doi: 10.1088/1674-1137/36/10/012
Abstract:
A micro-pattern gas detector named leak microstructure (LM) has been studied. A new chemical electrolytic technique is introduced to make perfect shaped LM needles with very sharp tips, and this method may be developed to make LM array detectors in b...
A micro-pattern gas detector named leak microstructure (LM) has been studied. A new chemical electrolytic technique is introduced to make perfect shaped LM needles with very sharp tips, and this method may be developed to make LM array detectors in b...
Low temperature testing and neutron irradiation of a swept charge device on board the HXMT satellite
2012, 36(10): 991-995. doi: 10.1088/1674-1137/36/10/013
Abstract:
We present the low temperature testing of an SCD detector, investigating its performance such as readout noise, energy resolution at 5.9 keV and dark current. The SCD's performance is closely related to temperature, and the temperature range of -80 ℃...
We present the low temperature testing of an SCD detector, investigating its performance such as readout noise, energy resolution at 5.9 keV and dark current. The SCD's performance is closely related to temperature, and the temperature range of -80 ℃...
2012, 36(10): 996-999. doi: 10.1088/1674-1137/36/10/014
Abstract:
The horizontal test for the BEPCⅡ 500 MHz spare cavity has been completed at IHEP. The maximum voltage of the cavity reached 2.17 MV, while Q0 was 5.78× 108. The process and results of the high power horizontal test are presented and discussed in thi...
The horizontal test for the BEPCⅡ 500 MHz spare cavity has been completed at IHEP. The maximum voltage of the cavity reached 2.17 MV, while Q0 was 5.78× 108. The process and results of the high power horizontal test are presented and discussed in thi...
2012, 36(10): 1000-1003. doi: 10.1088/1674-1137/36/10/015
Abstract:
A Penning ion gauge (PIG)-type ion source has been used for the generation of negative hydrogen ions (H-) as the internal ion source of the compact cyclotron. The discharge characteristics of the ion source are systematically studied for hydrogen ope...
A Penning ion gauge (PIG)-type ion source has been used for the generation of negative hydrogen ions (H-) as the internal ion source of the compact cyclotron. The discharge characteristics of the ion source are systematically studied for hydrogen ope...
2012, 36(10): 1004-1008. doi: 10.1088/1674-1137/36/10/016
Abstract:
A compact facility for cancer therapy has been designed and is presently under construction. A slow beam extraction system using the RF-Knock Out method and 3rd-order resonance is adopted in the synchrotron of this facility. Eight sextupoles are used...
A compact facility for cancer therapy has been designed and is presently under construction. A slow beam extraction system using the RF-Knock Out method and 3rd-order resonance is adopted in the synchrotron of this facility. Eight sextupoles are used...
2012, 36(10): 1009-1012. doi: 10.1088/1674-1137/36/10/017
Abstract:
Polarized positrons can be generated through the electron-positron pair creation from circularly polarized gamma-rays hitting a conversion target. Laser-Compton scattering is an efficient method to generate circularly polarized gamma-rays. Simulation...
Polarized positrons can be generated through the electron-positron pair creation from circularly polarized gamma-rays hitting a conversion target. Laser-Compton scattering is an efficient method to generate circularly polarized gamma-rays. Simulation...
2012, 36(10): 1013-1018. doi: 10.1088/1674-1137/36/10/018
Abstract:
For optimization and accurate prediction of the amount of proton production in the multi-cusp ion source, analysis of the electron energy distribution function (EEDF) is necessary. A three dimensional particle-in-cell with Monte Carlo collision (PIC-...
For optimization and accurate prediction of the amount of proton production in the multi-cusp ion source, analysis of the electron energy distribution function (EEDF) is necessary. A three dimensional particle-in-cell with Monte Carlo collision (PIC-...
2012, 36(10): 1019-1024. doi: 10.1088/1674-1137/36/10/019
Abstract:
Geometric calibration is critical to the accurate SPECT reconstruction. In this paper, a geometric calibration method was developed for a dedicated breast SPECT system with a tilted parallel beam (TPB) orbit. The acquisition geometry of the breast SP...
Geometric calibration is critical to the accurate SPECT reconstruction. In this paper, a geometric calibration method was developed for a dedicated breast SPECT system with a tilted parallel beam (TPB) orbit. The acquisition geometry of the breast SP...
2012, 36(10): 1025-1030. doi: 10.1088/1674-1137/36/10/020
Abstract:
Respiratory motion is a major factor that affects the quality of PET images of the thoracic area. The diaphragm moves about 15-20 mm due to respiratory motion, which substantially degrades the effective spatial resolution of PET. In this paper, a gat...
Respiratory motion is a major factor that affects the quality of PET images of the thoracic area. The diaphragm moves about 15-20 mm due to respiratory motion, which substantially degrades the effective spatial resolution of PET. In this paper, a gat...
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