2003 Vol. 20, No. 1
Display Method:
2003, 20(1): 1-10.
doi: 10.11804/NuclPhysRev.20.01.001
Abstract:
At the hadronic level, nucleons and mesons are constituents of nuclei and hadronic matter. Understanding the structures of hadrons, finding the physics of how the properties of these particles arise from the first principle, are major interests in modern nuclear physics. Among mesons, the lightest and most important one is certainly the pion, thus it is no accident that its structure, properties (both in free space and in nuclear matter) and interactions with nucleons and nuclei have gotten considerable ...
At the hadronic level, nucleons and mesons are constituents of nuclei and hadronic matter. Understanding the structures of hadrons, finding the physics of how the properties of these particles arise from the first principle, are major interests in modern nuclear physics. Among mesons, the lightest and most important one is certainly the pion, thus it is no accident that its structure, properties (both in free space and in nuclear matter) and interactions with nucleons and nuclei have gotten considerable ...
2003, 20(1): 11-17.
doi: 10.11804/NuclPhysRev.20.01.011
Abstract:
The boundstate β- decay stands for a particular weak interaction decay mode, which has a significant or dominant contribution to the β- decays of some highly ionized heavy atoms. The progress of the theoretical and experimental studies on this decay mode, and its importance to the sprocess synthesis of heavy elements as well as the 187Re、187Os cosmochronometer are presented.
The boundstate β- decay stands for a particular weak interaction decay mode, which has a significant or dominant contribution to the β- decays of some highly ionized heavy atoms. The progress of the theoretical and experimental studies on this decay mode, and its importance to the sprocess synthesis of heavy elements as well as the 187Re、187Os cosmochronometer are presented.
2003, 20(1): 18-25.
doi: 10.11804/NuclPhysRev.20.01.018
Abstract:
The proposed SLEGS (Shanghai Laser Electron backscattering Gamma Source) will be a circular and linear polarization, new generation, high quality γray source with Eγ=0.2-0.87 GeV. The major scientific focus of nuclear physics research at SLEGS will be investigations of the microscopic quarkgluon aspects of nucleons , nucleon resonance states and nuclei to test and develop nonperturbative QCD. Using polarized photoninduced reactions on unpolarized and polarized nucleon target such as γN→γ N, ...
The proposed SLEGS (Shanghai Laser Electron backscattering Gamma Source) will be a circular and linear polarization, new generation, high quality γray source with Eγ=0.2-0.87 GeV. The major scientific focus of nuclear physics research at SLEGS will be investigations of the microscopic quarkgluon aspects of nucleons , nucleon resonance states and nuclei to test and develop nonperturbative QCD. Using polarized photoninduced reactions on unpolarized and polarized nucleon target such as γN→γ N, ...
2003, 20(1): 26-29.
doi: 10.11804/NuclPhysRev.20.01.026
Abstract:
The excitation functions in dissipative heavy ion collision of27Al+27Al were measured. The incident beam energies were from 114 to 127 MeV in step of 200 keV. Angular correlation in excitation functions is analyzed, the coherent angle is more than 40°, the cross correlation coefficients are about 0.6. The longrange angular correlation is discussed with the concept of quantum superposition state in macroscopic conditions.
The excitation functions in dissipative heavy ion collision of27Al+27Al were measured. The incident beam energies were from 114 to 127 MeV in step of 200 keV. Angular correlation in excitation functions is analyzed, the coherent angle is more than 40°, the cross correlation coefficients are about 0.6. The longrange angular correlation is discussed with the concept of quantum superposition state in macroscopic conditions.
2003, 20(1): 30-33.
doi: 10.11804/NuclPhysRev.20.01.030
Abstract:
The γtransitions in 160Tb decay has been studied by γ ray spectroscopy and γγ coincidence measurements with highefficiency Ge(Li) and HpGe detectors. The β- decay scheme of 160Tb was proposed according to the results of γray spectroscopy and γγ coincidence measurement. The bandmixing parameter Zγ for 160Dy is determined and it is observed that the measured γray branching ratios do not lead to a unique value of Zγ for 160 Dy.
The γtransitions in 160Tb decay has been studied by γ ray spectroscopy and γγ coincidence measurements with highefficiency Ge(Li) and HpGe detectors. The β- decay scheme of 160Tb was proposed according to the results of γray spectroscopy and γγ coincidence measurement. The bandmixing parameter Zγ for 160Dy is determined and it is observed that the measured γray branching ratios do not lead to a unique value of Zγ for 160 Dy.
2003, 20(1): 34-37.
doi: 10.11804/NuclPhysRev.20.01.034
Abstract:
This article presents the basic principle of dipole integral magnetic field measurement . The integral coil which has the same radius with the dipole magnets was used to measure the integral magnetic field of different magnets in Cooler Storage Ring(HIRFLCSR). The article also generally introduced the software and hardware systems of the automatic measurement device. According to the repetitive experiments, a suit of better measurement got to be summarized. On the other hand, the article recommends the...
This article presents the basic principle of dipole integral magnetic field measurement . The integral coil which has the same radius with the dipole magnets was used to measure the integral magnetic field of different magnets in Cooler Storage Ring(HIRFLCSR). The article also generally introduced the software and hardware systems of the automatic measurement device. According to the repetitive experiments, a suit of better measurement got to be summarized. On the other hand, the article recommends the...
2003, 20(1): 38-41.
doi: 10.11804/NuclPhysRev.20.01.038
Abstract:
Heavy ion beams have different character from X, γ rays and neutrons. It has important value in theory and practice to use the character to carry out application and fundamental researches in biological field. Theoretical basis of the application and some practice and their results are briefly described here.
Heavy ion beams have different character from X, γ rays and neutrons. It has important value in theory and practice to use the character to carry out application and fundamental researches in biological field. Theoretical basis of the application and some practice and their results are briefly described here.
2003, 20(1): 42-47.
doi: 10.11804/NuclPhysRev.20.01.042
Abstract:
Four types of cells, melanoma B16, cervical squamous carcinima HeLa, Chinese hamster V79 and hepatoma SMMC7721, were irradiated by 125.5 keV/μm carbon ions. Celullar sensitivities to irradiation indicated by D50 , DNA double strand break (DSB) and distribution of DSB fragments expressed by molecular weight are studied. The results show that there is not a consistent relationship between cellular sensitivity and DNA DSB induction, a possible molecular mechanism of radiosensitivity which...
Four types of cells, melanoma B16, cervical squamous carcinima HeLa, Chinese hamster V79 and hepatoma SMMC7721, were irradiated by 125.5 keV/μm carbon ions. Celullar sensitivities to irradiation indicated by D50 , DNA double strand break (DSB) and distribution of DSB fragments expressed by molecular weight are studied. The results show that there is not a consistent relationship between cellular sensitivity and DNA DSB induction, a possible molecular mechanism of radiosensitivity which...
2003, 20(1): 48-51.
doi: 10.11804/NuclPhysRev.20.01.048
Abstract:
Using 55 MeV/u 40Ar and 80 MeV/u20Ne ion beams delivered by the Heavy Ion Research Facility at Lanzhou (HIRFL), the relationships between the irradiation homogeneities in irradiation fields generated by the beam scanning device located at the irradiation terminal of the HIRFL and ion fluence were measured respectively with 100 μm polycarbonate films by means of nuclear track detection. The results show that the homogeneity increases when the ion fluence are lower than ........
Using 55 MeV/u 40Ar and 80 MeV/u20Ne ion beams delivered by the Heavy Ion Research Facility at Lanzhou (HIRFL), the relationships between the irradiation homogeneities in irradiation fields generated by the beam scanning device located at the irradiation terminal of the HIRFL and ion fluence were measured respectively with 100 μm polycarbonate films by means of nuclear track detection. The results show that the homogeneity increases when the ion fluence are lower than ........
2003, 20(1): 52-54.
doi: 10.11804/NuclPhysRev.20.01.052
Abstract:
Quantitive analysis of DNA doublestrand break (DSB) is of importance for studying on the mechanisms of radiobiological effects induced by high linear energy transfer(LET) irradiation. For the practical use, one new calculating formula named the method of average molecular weight is deducted. In this method, the factual distribution of DSB fragments is not considered, but actually, the content and distribution of DSB fragments are included. Totally, this method is simple in shape and easy to use, esp...
Quantitive analysis of DNA doublestrand break (DSB) is of importance for studying on the mechanisms of radiobiological effects induced by high linear energy transfer(LET) irradiation. For the practical use, one new calculating formula named the method of average molecular weight is deducted. In this method, the factual distribution of DSB fragments is not considered, but actually, the content and distribution of DSB fragments are included. Totally, this method is simple in shape and easy to use, esp...
2003, 20(1): 55-60.
doi: 10.11804/NuclPhysRev.20.01.055
Abstract:
The effect of deflected channel on particle motion is equivalent to modulation with a weakpotential having a periodic same as the deflected channel has. The motion equation of a particle has been reduced to the nonlinear differential equation with a weakperiodic modulation by using sinesquared potential. The dechanneling fraction has been derived for a strained superlattice. The mainresonance and subresonance have been inverstigated by using multiscale method, a global bifurcation and the critic...
The effect of deflected channel on particle motion is equivalent to modulation with a weakpotential having a periodic same as the deflected channel has. The motion equation of a particle has been reduced to the nonlinear differential equation with a weakperiodic modulation by using sinesquared potential. The dechanneling fraction has been derived for a strained superlattice. The mainresonance and subresonance have been inverstigated by using multiscale method, a global bifurcation and the critic...
2003, 20(1): 61-65.
doi: 10.11804/NuclPhysRev.20.01.061
Abstract:
In 1982, phenomena of bombardmentinduced Gibssian segregation(BIGS) during alloy sputtering were found at low temperature. By using Monte Carlo(MC) simulation programs including mass effect, surface binding energy effect and bombardmentinduced Gibssian segregation effect, we especially study two important characters of BIGS (one is the character of the surface composition gradient of BIGS, and another is the intermediate character of the surface composition gradient of BIGS). The MC simulations give...
In 1982, phenomena of bombardmentinduced Gibssian segregation(BIGS) during alloy sputtering were found at low temperature. By using Monte Carlo(MC) simulation programs including mass effect, surface binding energy effect and bombardmentinduced Gibssian segregation effect, we especially study two important characters of BIGS (one is the character of the surface composition gradient of BIGS, and another is the intermediate character of the surface composition gradient of BIGS). The MC simulations give...
2003, 20(1): 66-69.
doi: 10.11804/NuclPhysRev.20.01.066
Abstract:
The radiation environments concerned with single event upset mainly consist of heavy ions from cosmic ray and large flux proton from solar events and planetary radiation belts. The most reliable calculation for SEE rate induced by proton and henvy ions are the way to use the experimentally measured data rospectively. But it is too expensive to test devices with both heavy ions and protons. So it is necessary to derive models for predicting proton crosssections and rates from heavyion test data....
The radiation environments concerned with single event upset mainly consist of heavy ions from cosmic ray and large flux proton from solar events and planetary radiation belts. The most reliable calculation for SEE rate induced by proton and henvy ions are the way to use the experimentally measured data rospectively. But it is too expensive to test devices with both heavy ions and protons. So it is necessary to derive models for predicting proton crosssections and rates from heavyion test data....
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