1997 Vol. 21, No. 4
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Abstract:
209Fr has been produced by irradiation of 197Au with 16O from SFC accelarator uia the fusion-evaporation 4n channel.The(EC+β+)decay of 209Fr has been studied by a He-jet tape transport system.The decay scheme is proposed for the first time based on γ...
209Fr has been produced by irradiation of 197Au with 16O from SFC accelarator uia the fusion-evaporation 4n channel.The(EC+β+)decay of 209Fr has been studied by a He-jet tape transport system.The decay scheme is proposed for the first time based on γ...
Abstract:
This paper measured the plateau curve,height of pulse related with bias voltage of silicon microstrip detector which was before and after exposed,and the leakage current as well as size of ‘black hole’after exposed
This paper measured the plateau curve,height of pulse related with bias voltage of silicon microstrip detector which was before and after exposed,and the leakage current as well as size of ‘black hole’after exposed
Abstract:
Two diferent kinds of neural network methods,BP and LVQ,are applied to the identification of e,μ,πparticles in BES experiment,and better results are obtained.The μ data samples used for training and tests are from cosmic events,e and π are strictly s...
Two diferent kinds of neural network methods,BP and LVQ,are applied to the identification of e,μ,πparticles in BES experiment,and better results are obtained.The μ data samples used for training and tests are from cosmic events,e and π are strictly s...
Abstract:
Measurements of the angular distributions and yields of atoms sputtered from Ag target by bombardment with FeCl+,56Fe+ and 35Cl+ are reported.Large enhancement occurs in the measured Ag atom yield for FeCl+ projectile in comparison with the sum of th...
Measurements of the angular distributions and yields of atoms sputtered from Ag target by bombardment with FeCl+,56Fe+ and 35Cl+ are reported.Large enhancement occurs in the measured Ag atom yield for FeCl+ projectile in comparison with the sum of th...
Abstract:
In topcolor-assisted technicolor scheme,we calculate the correction of the neutral color octet PG boson P0a to top quark production at the Tevatron.The result is that the PG boson P0a can significantly enhance the top quark production cross section.
In topcolor-assisted technicolor scheme,we calculate the correction of the neutral color octet PG boson P0a to top quark production at the Tevatron.The result is that the PG boson P0a can significantly enhance the top quark production cross section.
Abstract:
We discuss a category of stable dark matter particles which are weakly interacting and related to the superstructure of the universe.These particles may be degenerate fermions and the bosons near a high temperature state.In both cases,we deduce that ...
We discuss a category of stable dark matter particles which are weakly interacting and related to the superstructure of the universe.These particles may be degenerate fermions and the bosons near a high temperature state.In both cases,we deduce that ...
Abstract:
Using thermo-field edynamics method,we calculate the efective mass and Debye screening mass of the gluon at finite temperature and finite density.The critical temperature and density for the dissociation of J/ψ and ψ′are obtained.
Using thermo-field edynamics method,we calculate the efective mass and Debye screening mass of the gluon at finite temperature and finite density.The critical temperature and density for the dissociation of J/ψ and ψ′are obtained.
Abstract:
Using the“con ealgorithm”in QCD to identify jet,the hard and soft processes in high energy hadroncic olisions are analysed indetail.A Monte Carlo simulation event sample is produced by PYTHIA.The resultant pseudorapidity distribution of jets has a pl...
Using the“con ealgorithm”in QCD to identify jet,the hard and soft processes in high energy hadroncic olisions are analysed indetail.A Monte Carlo simulation event sample is produced by PYTHIA.The resultant pseudorapidity distribution of jets has a pl...
Abstract:
With a density-,temperature-,and momentum-dependent mean field,five diferent phases of nuclear equationo fstate:the gas,liquid,super heated liquid,supercooled gas and mechanical instability of spinodal phase for 197Au are described.Afterperforming a ...
With a density-,temperature-,and momentum-dependent mean field,five diferent phases of nuclear equationo fstate:the gas,liquid,super heated liquid,supercooled gas and mechanical instability of spinodal phase for 197Au are described.Afterperforming a ...
Abstract:
The dynamical calculation of quasi-fission reaction induced by 10.6MeV/u 84Kr on 27Al is performed using one-body dissipation model.The calculation suggests a fission time larger than 200×10－22 sec.It is found that the threshold for emergence of quas...
The dynamical calculation of quasi-fission reaction induced by 10.6MeV/u 84Kr on 27Al is performed using one-body dissipation model.The calculation suggests a fission time larger than 200×10－22 sec.It is found that the threshold for emergence of quas...
Abstract:
In the nuclear pair shell model(NPSM),it is found that the“realistic”pairs of the valence proton and valence neutron can be used as the building blocks for many-body wavefunction,and the contribution from particle energy term H0 can be taken into acc...
In the nuclear pair shell model(NPSM),it is found that the“realistic”pairs of the valence proton and valence neutron can be used as the building blocks for many-body wavefunction,and the contribution from particle energy term H0 can be taken into acc...
Abstract:
The relationship between the Gerasimov-Drell-Hearn(GDH)sum rule and the first monent,ΓP-the proton spin dependent structure function integral,is established.According to the sum rule and quark structure model of baryon,[SUsf(6)⊙O(3)]⊙SUc(3),the spin ...
The relationship between the Gerasimov-Drell-Hearn(GDH)sum rule and the first monent,ΓP-the proton spin dependent structure function integral,is established.According to the sum rule and quark structure model of baryon,[SUsf(6)⊙O(3)]⊙SUc(3),the spin ...
Abstract:
A simulation of electron cooling process for the heavy ion beam in the proposed HIRFL Cooler-Storage Ring(HIRFL-CSR)is performed by taking into account the betatron and synchrotron oscilations of single particle.The continuous evolution of ion beam e...
A simulation of electron cooling process for the heavy ion beam in the proposed HIRFL Cooler-Storage Ring(HIRFL-CSR)is performed by taking into account the betatron and synchrotron oscilations of single particle.The continuous evolution of ion beam e...
Abstract:
Thi spaper describes thedesign,simulation and experiment of a multi-cavity RF gun with thermionic cathode for BFEL.This RF gun consists of 1/2+3 cavities (its first half cavity is about 1/3 of a full cavity) with a axis coupling bi-period standing-wa...
Thi spaper describes thedesign,simulation and experiment of a multi-cavity RF gun with thermionic cathode for BFEL.This RF gun consists of 1/2+3 cavities (its first half cavity is about 1/3 of a full cavity) with a axis coupling bi-period standing-wa...
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