A strong-coupling plasma model with ion screening and electron polarization was used to study the room temperature D-D fusion reaction rate.By using the ground state harmonic-oscillator wave,function,we evaluated the ...A strong-coupling plasma model with ion screening and electron polarization was used to study the room temperature D-D fusion reaction rate.By using the ground state harmonic-oscillator wave,function,we evaluated the nearest-neighbor penetration probability by WKB method.The D-D nuclear fusion re-action rate was calculated.The deuteron density is found to be crucial for the occurrence of fusion reaction while the temperature is much less important.展开更多
The minimal grand unified theories with three-family should include two extra Z bosons which belong to the different broken scales.Georgias argument on heavy Dirac fermions has been realized.These fermions should be n...The minimal grand unified theories with three-family should include two extra Z bosons which belong to the different broken scales.Georgias argument on heavy Dirac fermions has been realized.These fermions should be not bizarre.展开更多
The collinear fast ion beam-laser spectroscopy has been used to measure the radiative lifetime of the(23587)°_(9/2) level of the rare earth ions NdII.The measurement was carried out by the interaction between the...The collinear fast ion beam-laser spectroscopy has been used to measure the radiative lifetime of the(23587)°_(9/2) level of the rare earth ions NdII.The measurement was carried out by the interaction between the SOkeV Ndll ion beam and tunable collinear dye laser which resonantly ezcited a metastable level to the(23537)°_(9/2) level,and by the observation of its time-resolved decay downstream.The lifetime value obtained from a fit program was 27.6±0.9ns.The result may provide a possibility of determining the unknown configuration of the(23537)°_(9/2) level.展开更多
The projectile energy dependence of K-shell ionization probability have been measured across the narrow resonance 2.522Mev with large ratio of Uk/Г=5.3 in the reaction^(56)Fe(p,p)^(56)Fe.The frame work of the theory ...The projectile energy dependence of K-shell ionization probability have been measured across the narrow resonance 2.522Mev with large ratio of Uk/Г=5.3 in the reaction^(56)Fe(p,p)^(56)Fe.The frame work of the theory proposed by Blair and Anholt was introduced to analyze the results.展开更多
The alpha-particle effects on high-n toroidal shear Alfven mode are investigated analytically.The mode can be driven to unstable when the alpha-particles have an anisotropic distribution function due to ripple losses ...The alpha-particle effects on high-n toroidal shear Alfven mode are investigated analytically.The mode can be driven to unstable when the alpha-particles have an anisotropic distribution function due to ripple losses in tokamaks.The growth rates of the instability in both“fast”and "slow"plasma heating cases are calculated,and the conditions for the excitation of the modes are also studied.展开更多
A multiple shooting method combined with a Newton iteration for determining bifurcation curves of two-dimensional maps is presented.This method is so effective that the high period bifurcation curves which could not b...A multiple shooting method combined with a Newton iteration for determining bifurcation curves of two-dimensional maps is presented.This method is so effective that the high period bifurcation curves which could not be estimated with any other methods can be determined.Some P8 bifurcation curves of the Henon map are calculated as an example.展开更多
A renormalization group method for calculating the localization length of coupled disordered chains is presented.By using this method,we can determine the localization length of coupled chains accurately.
The stability properties of ion temperature gradient instability are studied analytically in both weak and strong ballooning limits for toroidal geometry.The local anomalous ion thermal conductivity Xi is obtained.The...The stability properties of ion temperature gradient instability are studied analytically in both weak and strong ballooning limits for toroidal geometry.The local anomalous ion thermal conductivity Xi is obtained.The scaling of this conductivity under slab approximation is consistent with the results given by Connor et al.The toroidal effects contribute an additional Pfirsch-Schlüter factor(l+2q2)3/4 to the conductivity.展开更多
We introduce an approach to expand gauge-invariant Wilson operators on the lattice. This approach is based on the non-Abelian-Stokes theorem and overcomes the disadvantages of the Luscher-Weisz method. It is also suit...We introduce an approach to expand gauge-invariant Wilson operators on the lattice. This approach is based on the non-Abelian-Stokes theorem and overcomes the disadvantages of the Luscher-Weisz method. It is also suitable for expanding any Wilson operator.展开更多
The rigid-rotor with a q-deformed moment of inertia is introduced to describe the nuclear rotational spectra.With the representations of quantum algebra,the normal deformed and superdeformed bands are naturally differ...The rigid-rotor with a q-deformed moment of inertia is introduced to describe the nuclear rotational spectra.With the representations of quantum algebra,the normal deformed and superdeformed bands are naturally differentiated by softness.The yrast normal deformed bands in rare earth and actinium regions,as well as the yrast superdeformed bands in A-190 and 150 regions are investigated.The calculated results agree with experimental data qualitatively well,and the values of the parameters are physically reasonable.This indicates that the fixed deformation,the stretching effect and the many body statistics effect are three possible dominant factors to govern nuclear rotational bands.展开更多
By using the principle of detailed balance, the thermonuclear reaction rates for the 28Si (α , p ) 31p reaction were evaluated from the 31p ( p ,α ) 28Si resonance parameters. The reaction rates vary from 1.75x10-1 ...By using the principle of detailed balance, the thermonuclear reaction rates for the 28Si (α , p ) 31p reaction were evaluated from the 31p ( p ,α ) 28Si resonance parameters. The reaction rates vary from 1.75x10-1 to 1.08 x104 in the region T9=2-5, which agree with the theoretical predictions.展开更多
Irreducible representations of Birman-Wenzl algebras are constructed by using the induced representation and the linear equation method. Self-adjoint representations of Birman-Wenzl algebras Cf (r, q) with f≤4 are pr...Irreducible representations of Birman-Wenzl algebras are constructed by using the induced representation and the linear equation method. Self-adjoint representations of Birman-Wenzl algebras Cf (r, q) with f≤4 are presented.展开更多
基金The project partly supported by National Natural Science Foundation of China under Grant No. 10247001.The author would like to thank Prof. T.D. Lee for his continuous guidance and instruction.
文摘A strong-coupling plasma model with ion screening and electron polarization was used to study the room temperature D-D fusion reaction rate.By using the ground state harmonic-oscillator wave,function,we evaluated the nearest-neighbor penetration probability by WKB method.The D-D nuclear fusion re-action rate was calculated.The deuteron density is found to be crucial for the occurrence of fusion reaction while the temperature is much less important.
基金supported by National Natural Science Foundation of China。
文摘The minimal grand unified theories with three-family should include two extra Z bosons which belong to the different broken scales.Georgias argument on heavy Dirac fermions has been realized.These fermions should be not bizarre.
基金Supported by The Chinese National Science Foundation for Doctoral Research。
文摘The collinear fast ion beam-laser spectroscopy has been used to measure the radiative lifetime of the(23587)°_(9/2) level of the rare earth ions NdII.The measurement was carried out by the interaction between the SOkeV Ndll ion beam and tunable collinear dye laser which resonantly ezcited a metastable level to the(23537)°_(9/2) level,and by the observation of its time-resolved decay downstream.The lifetime value obtained from a fit program was 27.6±0.9ns.The result may provide a possibility of determining the unknown configuration of the(23537)°_(9/2) level.
基金Project supported by the Chinese National Science Foundation of Doctoral Research.
文摘The projectile energy dependence of K-shell ionization probability have been measured across the narrow resonance 2.522Mev with large ratio of Uk/Г=5.3 in the reaction^(56)Fe(p,p)^(56)Fe.The frame work of the theory proposed by Blair and Anholt was introduced to analyze the results.
基金supported by NSFC,APSC and UNESCO grant SC/RP 231322.7.
文摘The alpha-particle effects on high-n toroidal shear Alfven mode are investigated analytically.The mode can be driven to unstable when the alpha-particles have an anisotropic distribution function due to ripple losses in tokamaks.The growth rates of the instability in both“fast”and "slow"plasma heating cases are calculated,and the conditions for the excitation of the modes are also studied.
基金Project supported by the National Science Foundation of China。
文摘A multiple shooting method combined with a Newton iteration for determining bifurcation curves of two-dimensional maps is presented.This method is so effective that the high period bifurcation curves which could not be estimated with any other methods can be determined.Some P8 bifurcation curves of the Henon map are calculated as an example.
文摘A renormalization group method for calculating the localization length of coupled disordered chains is presented.By using this method,we can determine the localization length of coupled chains accurately.
文摘The stability properties of ion temperature gradient instability are studied analytically in both weak and strong ballooning limits for toroidal geometry.The local anomalous ion thermal conductivity Xi is obtained.The scaling of this conductivity under slab approximation is consistent with the results given by Connor et al.The toroidal effects contribute an additional Pfirsch-Schlüter factor(l+2q2)3/4 to the conductivity.
基金Supported by the National Natural Science Foundation of China under Grant Nos.19991487 and 10075051the National Research Center for Intelligent Computer System under Grant Nos.99128 and 00132。
文摘We introduce an approach to expand gauge-invariant Wilson operators on the lattice. This approach is based on the non-Abelian-Stokes theorem and overcomes the disadvantages of the Luscher-Weisz method. It is also suitable for expanding any Wilson operator.
基金Supported by the National Natural Science Foundation of China under Grant Nos.19677102,19775044 and 19775044the Doctoral Unit Research Program Foundation of the State Education Commit tee of China(97035807)+1 种基金Centre of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator LanzhouNational Laboratory of Beijing Electron-Positron Collision.
文摘The rigid-rotor with a q-deformed moment of inertia is introduced to describe the nuclear rotational spectra.With the representations of quantum algebra,the normal deformed and superdeformed bands are naturally differentiated by softness.The yrast normal deformed bands in rare earth and actinium regions,as well as the yrast superdeformed bands in A-190 and 150 regions are investigated.The calculated results agree with experimental data qualitatively well,and the values of the parameters are physically reasonable.This indicates that the fixed deformation,the stretching effect and the many body statistics effect are three possible dominant factors to govern nuclear rotational bands.
文摘By using the principle of detailed balance, the thermonuclear reaction rates for the 28Si (α , p ) 31p reaction were evaluated from the 31p ( p ,α ) 28Si resonance parameters. The reaction rates vary from 1.75x10-1 to 1.08 x104 in the region T9=2-5, which agree with the theoretical predictions.
基金the National Natural Science Foundation of China
文摘Irreducible representations of Birman-Wenzl algebras are constructed by using the induced representation and the linear equation method. Self-adjoint representations of Birman-Wenzl algebras Cf (r, q) with f≤4 are presented.
