1998 Vol. 22, No. 12
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Abstract:
60MeV /u 18O ion beam delivered by the Heavy Ion Research Facility in Lanzhou (HIRFL) bombarded the natural tungsten targets. The 186Hf was produced by multinucleon transfer reacions. The hafnium fraction was separated radiochemically from the mixtur...
60MeV /u 18O ion beam delivered by the Heavy Ion Research Facility in Lanzhou (HIRFL) bombarded the natural tungsten targets. The 186Hf was produced by multinucleon transfer reacions. The hafnium fraction was separated radiochemically from the mixtur...
Abstract:
In this paper, the target-dependence of neutron-proton ratio of the projectile-like fragments, prepuced in the peripheral heavy-ion collisions, is discussed based on the comparison between the experimental results and the isospin dependent QMD model ...
In this paper, the target-dependence of neutron-proton ratio of the projectile-like fragments, prepuced in the peripheral heavy-ion collisions, is discussed based on the comparison between the experimental results and the isospin dependent QMD model ...
Abstract:
The average independent production cross sections of the radioactive Hg isotopes in the mass range of 180 to 209, produced in 600MeV-18O bombardment on (nat)Pb (thick target), were measured. The production mechanisms for the Hg-isotope products at di...
The average independent production cross sections of the radioactive Hg isotopes in the mass range of 180 to 209, produced in 600MeV-18O bombardment on (nat)Pb (thick target), were measured. The production mechanisms for the Hg-isotope products at di...
Abstract:
The effect to low energy neutrons from monoenergetic neutron source on achvation cross section measurements was analysed and studied. This analysis was proved by the measured neutron spectra of T(d,n)4He and D(d,n)3He neutron sources. Finally the cro...
The effect to low energy neutrons from monoenergetic neutron source on achvation cross section measurements was analysed and studied. This analysis was proved by the measured neutron spectra of T(d,n)4He and D(d,n)3He neutron sources. Finally the cro...
Abstract:
The decay of 83Sr has been reinvestigated using γ singles and γ-γ-t coincidence measurement. The number of γ transitions assigned to 83Sr decay has been expanded from 102 to 196.19 new levels of 83Rb are added to the old level scheme and 8 formerly a...
The decay of 83Sr has been reinvestigated using γ singles and γ-γ-t coincidence measurement. The number of γ transitions assigned to 83Sr decay has been expanded from 102 to 196.19 new levels of 83Rb are added to the old level scheme and 8 formerly a...
Abstract:
Properties of a new kind of double metal contact GaAs semiconductors have been investigated. We measured the spectra of 5.48MeV α particles from 241Am,122keV photons from 57Co and 2.27MeV MIPs from 90Sr and compared the cce and FWHM of a 3×3mm2 GaAs ...
Properties of a new kind of double metal contact GaAs semiconductors have been investigated. We measured the spectra of 5.48MeV α particles from 241Am,122keV photons from 57Co and 2.27MeV MIPs from 90Sr and compared the cce and FWHM of a 3×3mm2 GaAs ...
Abstract:
The modified Seiberg-Witten monopole equations on a three-manifold are presented in this paper. Special analytic solutions to these eqations are given. These eqations are invariant under the conformal transformation.
The modified Seiberg-Witten monopole equations on a three-manifold are presented in this paper. Special analytic solutions to these eqations are given. These eqations are invariant under the conformal transformation.
Abstract:
The K+ production and flow in relahvistic heavy-ion collisions are investigated with the self-consistent relahvistic Boltzmann-Uehling-Uhlenbeck (RBUU) approach. The results show that the kaon flow is sensitive to both the kaonnucleon sigma term ∑KNa...
The K+ production and flow in relahvistic heavy-ion collisions are investigated with the self-consistent relahvistic Boltzmann-Uehling-Uhlenbeck (RBUU) approach. The results show that the kaon flow is sensitive to both the kaonnucleon sigma term ∑KNa...
Abstract:
We calculate one-loop corrections to the top-quark decay width г(t→W+ b)from PGBs (Pseudo-Goldstone bosons) in the MWTCM (multiscale walking technicolor model). The cormctions are found so large that г(t→W+ b) is decreased largely. If topeolor is fur...
We calculate one-loop corrections to the top-quark decay width г(t→W+ b)from PGBs (Pseudo-Goldstone bosons) in the MWTCM (multiscale walking technicolor model). The cormctions are found so large that г(t→W+ b) is decreased largely. If topeolor is fur...
Abstract:
Elastic differential cross sections for K+ mesons scattered from 12C and 6Li targets at an incident momentum of 715 MeV/c and from(12). 40Ca targets at an incident momentum of 800 MeV/c have been studied in this paper. The method of the eikonal phase...
Elastic differential cross sections for K+ mesons scattered from 12C and 6Li targets at an incident momentum of 715 MeV/c and from(12). 40Ca targets at an incident momentum of 800 MeV/c have been studied in this paper. The method of the eikonal phase...
Abstract:
BCS theory is used to calculate the moments of inertia (Mol) of odd-A and even-even rare-earth nuclei. It is found that the large fluctuations of the odd-even differences in MoI can be repreduced through the BCS calculations, although the MoI values ...
BCS theory is used to calculate the moments of inertia (Mol) of odd-A and even-even rare-earth nuclei. It is found that the large fluctuations of the odd-even differences in MoI can be repreduced through the BCS calculations, although the MoI values ...
Abstract:
The relation between the leptonic decay width of J/ψ and the color screening mass at finite temperature is studied by using different quark binding potentials. The leptonic decay behaviour of J/ψ in the hot and dense matter is obtained.
The relation between the leptonic decay width of J/ψ and the color screening mass at finite temperature is studied by using different quark binding potentials. The leptonic decay behaviour of J/ψ in the hot and dense matter is obtained.
Abstract:
The possibility and method of designing a high luminosity collider with negative momentum compaction factor (αp<0) lattice are studied. As a practical example, the feasibility of adopting the αp<0 lattice for a τ-charm factory is discussed.
The possibility and method of designing a high luminosity collider with negative momentum compaction factor (αp<0) lattice are studied. As a practical example, the feasibility of adopting the αp<0 lattice for a τ-charm factory is discussed.
Abstract:
The physics issues involved in the lattice design of Beijing Tau-charm Factory (BTCF) storage ring are investigated and studied. A lattice that takes the high luminosity mode as the first priority and is compatible with monochromator mode and polariz...
The physics issues involved in the lattice design of Beijing Tau-charm Factory (BTCF) storage ring are investigated and studied. A lattice that takes the high luminosity mode as the first priority and is compatible with monochromator mode and polariz...
Abstract:
The beam dynamics of coupled bunch instability is studied using simulation method in this paper. The code SCBI (Simulation of Coupled-Bunch Instabilities) is developed. ms code can be used to study the multi-bunch instabilities including the effects ...
The beam dynamics of coupled bunch instability is studied using simulation method in this paper. The code SCBI (Simulation of Coupled-Bunch Instabilities) is developed. ms code can be used to study the multi-bunch instabilities including the effects ...
Abstract:
We have investigated structrues and topography features of sputered graphite surface using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and demonstrated that carbon nanotubes can be grown up by sputtered-atom deposit...
We have investigated structrues and topography features of sputered graphite surface using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and demonstrated that carbon nanotubes can be grown up by sputtered-atom deposit...
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