2007 Vol. 31, No. 4
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Abstract:
Recently many theoretical calculations have been made for the cross section of e+e－→τ+τ－ near the threshold, the accuracy of which is up to 10－4. Based on one of the calculations, the e μ-contained final state data are refitted by utilizing the techn...
Recently many theoretical calculations have been made for the cross section of e+e－→τ+τ－ near the threshold, the accuracy of which is up to 10－4. Based on one of the calculations, the e μ-contained final state data are refitted by utilizing the techn...
Abstract:
The recent measurements of the Bs mass difference Δ Ms by the CDF and DO collaborations are roughly consistent with the Standard Model predictions, therefore, these measurements will afford an opportunity to constrain new physics scenarios beyond the...
The recent measurements of the Bs mass difference Δ Ms by the CDF and DO collaborations are roughly consistent with the Standard Model predictions, therefore, these measurements will afford an opportunity to constrain new physics scenarios beyond the...
Abstract:
A nonlinear theoretical model of interaction between q-deformed light field and a cascade three-level atom has been constructed. The formal solution of Schr\"{o}dinger equation in the interactive epresentation and the expectation value of the interac...
A nonlinear theoretical model of interaction between q-deformed light field and a cascade three-level atom has been constructed. The formal solution of Schr\"{o}dinger equation in the interactive epresentation and the expectation value of the interac...
Abstract:
A solar cosmic rays Ground Level Enhancement(GLE) event associated with a X7.1/2b solar flare in 2005 January 20 was observed by the Yangbajing solar neutron telescope(SNT) and neutron monitor(NM), located at Yangbajing Tibet(90.53°E, 30.11°N, 4310m ...
A solar cosmic rays Ground Level Enhancement(GLE) event associated with a X7.1/2b solar flare in 2005 January 20 was observed by the Yangbajing solar neutron telescope(SNT) and neutron monitor(NM), located at Yangbajing Tibet(90.53°E, 30.11°N, 4310m ...
Abstract:
In the RMF approach, considering the contributions of the σ* and φ mesons and the hyperons in the baryon octet {N,P,Λ,∑－,∑0,∑+,Ξ－,Ξ0}, the properties of neutron star matter have been investigated. It is found that with the contributions of the σ* and...
In the RMF approach, considering the contributions of the σ* and φ mesons and the hyperons in the baryon octet {N,P,Λ,∑－,∑0,∑+,Ξ－,Ξ0}, the properties of neutron star matter have been investigated. It is found that with the contributions of the σ* and...
Abstract:
The reduced velocity correlation functions of the Intermediate Mass Fragments (IMFs) were measured in the reactions of 36Ar+112,124Sn at 35MeV/u. The anti-correlation at small reduced velocities is more pronounced in 36Ar+124Sn system than that in 36...
The reduced velocity correlation functions of the Intermediate Mass Fragments (IMFs) were measured in the reactions of 36Ar+112,124Sn at 35MeV/u. The anti-correlation at small reduced velocities is more pronounced in 36Ar+124Sn system than that in 36...
Abstract:
High-spin states in 139Ce have been populated using the 130Te(12C,3n) reaction at beam energy of 50MeV. The level scheme of 139Ce has been revised and extended greatly up to E=5765.0keV. The level structure of 139Ce shows typical characteristics of s...
High-spin states in 139Ce have been populated using the 130Te(12C,3n) reaction at beam energy of 50MeV. The level scheme of 139Ce has been revised and extended greatly up to E=5765.0keV. The level structure of 139Ce shows typical characteristics of s...
Abstract:
The ground-state properties of N=8 and N=9 isotones are investigated in the framework of the single-particle shell model. The isospin effect on the average nuclear potential is taken into account by introducing an isospin-dependent term in the depth ...
The ground-state properties of N=8 and N=9 isotones are investigated in the framework of the single-particle shell model. The isospin effect on the average nuclear potential is taken into account by introducing an isospin-dependent term in the depth ...
Abstract:
The dinuclear system model has been further developed by introducing the barrier distribution function method in the process of heavy-ion capture and fusion to synthesize superheavy nuclei. The capture of two colliding nuclei, formation and de-excita...
The dinuclear system model has been further developed by introducing the barrier distribution function method in the process of heavy-ion capture and fusion to synthesize superheavy nuclei. The capture of two colliding nuclei, formation and de-excita...
Abstract:
A full-length prototype of the BESⅢ drift chamber was built. The experience gained on gas sealing, high voltage supply and front-end electronics installation should be greatly beneficial to the successful construction of the BESⅢ drift chamber. An on...
A full-length prototype of the BESⅢ drift chamber was built. The experience gained on gas sealing, high voltage supply and front-end electronics installation should be greatly beneficial to the successful construction of the BESⅢ drift chamber. An on...
Abstract:
Based on analysis of STAR-TOFr data from RHIC 62.4GeV Au+Au experiments, correlation between the MRPC signal amplitude (ADC) and the ionization energy loss (dE/dx) in working gas, for different particles (Pion, Kaon, Proton), are studied. Experimenta...
Based on analysis of STAR-TOFr data from RHIC 62.4GeV Au+Au experiments, correlation between the MRPC signal amplitude (ADC) and the ionization energy loss (dE/dx) in working gas, for different particles (Pion, Kaon, Proton), are studied. Experimenta...
Abstract:
A transverse field gas ionization chamber as ΔE detector at the Radioactive Ion Beam Line in Lanzhou (RIBLL) is described. A high detection efficiency and long plateau are achieved with the mixed gas Ar(80%)+CO2(20%). The energy resolution is 3.25% f...
A transverse field gas ionization chamber as ΔE detector at the Radioactive Ion Beam Line in Lanzhou (RIBLL) is described. A high detection efficiency and long plateau are achieved with the mixed gas Ar(80%)+CO2(20%). The energy resolution is 3.25% f...
Abstract:
The total dose response characteristics of the buried oxides (BOX) in separation by implanted oxygen (SIMOX) silicon-on-insulator (SOI) wafers have been improved by implanting silicon ion into the BOX layers. NMOS/SOI transistors with enclosed-gate s...
The total dose response characteristics of the buried oxides (BOX) in separation by implanted oxygen (SIMOX) silicon-on-insulator (SOI) wafers have been improved by implanting silicon ion into the BOX layers. NMOS/SOI transistors with enclosed-gate s...
Abstract:
In order to get high beam quality, a RF distribution system is required, with minimal phase drifts and errors in the BEPCⅡ linac. The additional installation of phase reference cables and monitoring equipments and stable RF distribution for BEPC lina...
In order to get high beam quality, a RF distribution system is required, with minimal phase drifts and errors in the BEPCⅡ linac. The additional installation of phase reference cables and monitoring equipments and stable RF distribution for BEPC lina...
Abstract:
The development of beam transport system of “Dragon-Ⅰ” linear induction accelerator(LIA) and the achievements are introduced in this paper. Along with the designs of many key elements such as solenoid coil, dipole steering coils, and multi-functional...
The development of beam transport system of “Dragon-Ⅰ” linear induction accelerator(LIA) and the achievements are introduced in this paper. Along with the designs of many key elements such as solenoid coil, dipole steering coils, and multi-functional...
Abstract:
Using the home-made synchrotron radiation soft X-ray polarimeter based on multilayer elements, the polarization characteristics of the Beamline 3W1B have been measured at Beijing Synchrotron Radiation Facility (BSRF). This paper compares the measurin...
Using the home-made synchrotron radiation soft X-ray polarimeter based on multilayer elements, the polarization characteristics of the Beamline 3W1B have been measured at Beijing Synchrotron Radiation Facility (BSRF). This paper compares the measurin...
Abstract:
The cavity mirrors of the storage-ring free-electron laser (SR-FEL) at 355nm and 248nm central wavelengths have been developed with the technologies of electron-beam evaporation deposition and ion-beam sputter deposition. The mirror coatings consists...
The cavity mirrors of the storage-ring free-electron laser (SR-FEL) at 355nm and 248nm central wavelengths have been developed with the technologies of electron-beam evaporation deposition and ion-beam sputter deposition. The mirror coatings consists...
Abstract:
Synchrotron Radiation based X-ray Fluorescent Microtomography (SR-XFMT) is a nondestructive technique for detecting elemental composition and distribution inside a specimen with high spatial resolution and sensitivity. In this paper, computer simulat...
Synchrotron Radiation based X-ray Fluorescent Microtomography (SR-XFMT) is a nondestructive technique for detecting elemental composition and distribution inside a specimen with high spatial resolution and sensitivity. In this paper, computer simulat...
Abstract:
Phase matching between different undulator segments is a key condition for high gain Free Electron Laser facilities to gain saturation laser output. This paper develops theoretical study on phase matching, provides the scheme to realize it and gives ...
Phase matching between different undulator segments is a key condition for high gain Free Electron Laser facilities to gain saturation laser output. This paper develops theoretical study on phase matching, provides the scheme to realize it and gives ...
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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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- Cosmology
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