1999 Vol. 16, No. 4
Display Method:
1999, 16(4): 197-200.
doi: 10.11804/NuclPhysRev.16.04.197
Abstract:
The pairing correlation is the most important residual interactions in nucleus system. The possibility for the investigation of pairing correlation with the many-body correlation approach and the feasibility of the approach, by taking the halo nuclei 11Li and 11Be as an example are elucidated.
The pairing correlation is the most important residual interactions in nucleus system. The possibility for the investigation of pairing correlation with the many-body correlation approach and the feasibility of the approach, by taking the halo nuclei 11Li and 11Be as an example are elucidated.
1999, 16(4): 201-206.
doi: 10.11804/NuclPhysRev.16.04.201
Abstract:
The development history of the nucleosynthesis theory of elements, which was presented by E. M. Burbidge. G. R. Burbidge, W. A. Fowler, F. Hoyle and A. G. W.Cameron, and the progress of this theory during the past 40 years are introduced.
The development history of the nucleosynthesis theory of elements, which was presented by E. M. Burbidge. G. R. Burbidge, W. A. Fowler, F. Hoyle and A. G. W.Cameron, and the progress of this theory during the past 40 years are introduced.
1999, 16(4): 207-213.
doi: 10.11804/NuclPhysRev.16.04.207
Abstract:
Synthesis of stellar elements is outlined, including the nuclear burning processes by which lighter nuclei are combined to form heavier nuclei through fusion with energy releasing and the neutron capture processes. The scenarios of the stellar evolution as functions of improving nuclear properties are illustrated.
Synthesis of stellar elements is outlined, including the nuclear burning processes by which lighter nuclei are combined to form heavier nuclei through fusion with energy releasing and the neutron capture processes. The scenarios of the stellar evolution as functions of improving nuclear properties are illustrated.
1999, 16(4): 214-217.
doi: 10.11804/NuclPhysRev.16.04.214
Abstract:
The study of coulomb excitation of the neutron-rich nuclei around N=20 and 28 shell closure with radioactive ion beam at intermediate energy is reviewed. The systematics of the measured energy of the 2+1 state shows that the N=20 shell closure in neutron-rich isotopes with Z≤12 disappears suddenly and N=28 shell elosure appears to be weak for 44S.The coulomb excitation studies of the exotic nuclei around the double magic 7828Ni50 at RIBLL are proposed.
The study of coulomb excitation of the neutron-rich nuclei around N=20 and 28 shell closure with radioactive ion beam at intermediate energy is reviewed. The systematics of the measured energy of the 2+1 state shows that the N=20 shell closure in neutron-rich isotopes with Z≤12 disappears suddenly and N=28 shell elosure appears to be weak for 44S.The coulomb excitation studies of the exotic nuclei around the double magic 7828Ni50 at RIBLL are proposed.
1999, 16(4): 218-223.
doi: 10.11804/NuclPhysRev.16.04.218
Abstract:
Radioactive Ion Beam Line in Lanzhou (RIBLL) is a facility to produce intermediate energy radioactive ion beams (RIB), and also a high precision spectrometer for RIB physical experiments. The solid angle acceptance of RIBLL is 6. 5 msr. The momentum acceptance is about 10%. The polarized RIBs will be available. RIBLL is the equipment with double achromatic and asymmetric structure. So that it can not only sublimate the RIBs in pureness, but also operate as 0° magnet spectrometer.
Radioactive Ion Beam Line in Lanzhou (RIBLL) is a facility to produce intermediate energy radioactive ion beams (RIB), and also a high precision spectrometer for RIB physical experiments. The solid angle acceptance of RIBLL is 6. 5 msr. The momentum acceptance is about 10%. The polarized RIBs will be available. RIBLL is the equipment with double achromatic and asymmetric structure. So that it can not only sublimate the RIBs in pureness, but also operate as 0° magnet spectrometer.
1999, 16(4): 224-229.
doi: 10.11804/NuclPhysRev.16.04.224
Abstract:
The systematics of the fission delay is reviewed. The theory and experiment researches on the formation of the super-heavy compound nucleus by means of Giant Dipole Resonance γ-ray are introduled.
The systematics of the fission delay is reviewed. The theory and experiment researches on the formation of the super-heavy compound nucleus by means of Giant Dipole Resonance γ-ray are introduled.
1999, 16(4): 230-236.
doi: 10.11804/NuclPhysRev.16.04.230
Abstract:
The Lattice Gas Model is introduced to describe the features of phase transition and critical phenomena that take place after the collision between heavy ions at intermediate or high incident energy. New progresses in application into equation of state, phase transition and critical pheonomena, and shortcomings of this model in itself are also presented.
The Lattice Gas Model is introduced to describe the features of phase transition and critical phenomena that take place after the collision between heavy ions at intermediate or high incident energy. New progresses in application into equation of state, phase transition and critical pheonomena, and shortcomings of this model in itself are also presented.
1999, 16(4): 237-242.
doi: 10.11804/NuclPhysRev.16.04.237
Abstract:
The experiments on giant dipole resonance performed at HIRFL of the Institute of Modern Physics are reviewed. At HIRFL and CSR the prospective high energy gamma experiments on double phonon state, Bremstrahlung, the connection between disappearance of collective motion and phase transition, and so on, are also discussed.
The experiments on giant dipole resonance performed at HIRFL of the Institute of Modern Physics are reviewed. At HIRFL and CSR the prospective high energy gamma experiments on double phonon state, Bremstrahlung, the connection between disappearance of collective motion and phase transition, and so on, are also discussed.
1999, 16(4): 243-245.
doi: 10.11804/NuclPhysRev.16.04.243
Abstract:
The decay properties of neutron-deficient rare earth nucleus 137Eu have been studied by means of on-line isotope separator combined with rapid tape transport system.The products were produced by 190 MeV 36Ar bombarding on Pd target via natPd (36Ar, pxn)137Eu reactions. γ, X singles and γ-X, γ-γ coincidence spectra of the nuclei with A=137 were measured. The half-life of 137Eu is obtained to be 9. 8 s. A γ-ray with energy of 209. 0 keV for 137Eu was observed.
The decay properties of neutron-deficient rare earth nucleus 137Eu have been studied by means of on-line isotope separator combined with rapid tape transport system.The products were produced by 190 MeV 36Ar bombarding on Pd target via natPd (36Ar, pxn)137Eu reactions. γ, X singles and γ-X, γ-γ coincidence spectra of the nuclei with A=137 were measured. The half-life of 137Eu is obtained to be 9. 8 s. A γ-ray with energy of 209. 0 keV for 137Eu was observed.
1999, 16(4): 246-250.
doi: 10.11804/NuclPhysRev.16.04.246
Abstract:
In this work, the Generalized Superfluid Model (GSM) level density formula has been studied. On the basis of the average neutron resonance level spacing D0 and cumulative level number N0 which were evaluated by ourselves, a set of GSM level density parameters has been obtained. These parameters have been included in the initial data file of IAEA s Reference Input Parameter Library (RIPL).
In this work, the Generalized Superfluid Model (GSM) level density formula has been studied. On the basis of the average neutron resonance level spacing D0 and cumulative level number N0 which were evaluated by ourselves, a set of GSM level density parameters has been obtained. These parameters have been included in the initial data file of IAEA s Reference Input Parameter Library (RIPL).
1999, 16(4): 251-255.
doi: 10.11804/NuclPhysRev.16.04.251
Abstract:
The formula of fractal dimension in coordinate space is extended to the momentum space. The fractal dimension of the momentum distribution of final-state clusters in center region produced by nondiffraction processes of high-energy hadronic collisions is calculated based on the Three Fire-Ball Model and is found to be 2.
The formula of fractal dimension in coordinate space is extended to the momentum space. The fractal dimension of the momentum distribution of final-state clusters in center region produced by nondiffraction processes of high-energy hadronic collisions is calculated based on the Three Fire-Ball Model and is found to be 2.
1999, 16(4): 256-261.
doi: 10.11804/NuclPhysRev.16.04.256
Abstract:
In cooling storage ring heavy ion beam is plasma of high density. when a big power laser interacted on it, it will get ultra-high temperature. This beam irradiated on an object will get ultra-high pressure. This high energy pulse laser can produce X-ray laser. In the cooling storage ring absolute value of charge mean root radius of Lithium-like nuclei will be measured by the X-ray laser. It will be broken through in investigating the property of nuclear ground state. That will create many...
In cooling storage ring heavy ion beam is plasma of high density. when a big power laser interacted on it, it will get ultra-high temperature. This beam irradiated on an object will get ultra-high pressure. This high energy pulse laser can produce X-ray laser. In the cooling storage ring absolute value of charge mean root radius of Lithium-like nuclei will be measured by the X-ray laser. It will be broken through in investigating the property of nuclear ground state. That will create many...
1999, 16(4): 262-266.
doi: 10.11804/NuclPhysRev.16.04.262
Abstract:
The basic theory of tumor radiotherapy with heavy ion beam was introduced in contrast to low LET irradiation therapy. Some useful methods are also suggested to improve the curative effect of heavy ion therapy and to spare the normal tissue around the tumor.
The basic theory of tumor radiotherapy with heavy ion beam was introduced in contrast to low LET irradiation therapy. Some useful methods are also suggested to improve the curative effect of heavy ion therapy and to spare the normal tissue around the tumor.
1999, 16(4): 267-272.
doi: 10.11804/NuclPhysRev.16.04.267
Abstract:
The existing nuclear power system has many problems, such as low utilization ratio of natural resources, output of long life radioactive nuclear wastes and safety of operation etc. The transmutation technology by using accelerator-driven sub-critical reactor can generate not only clean nuclear power, but also can transmutate nuclear wastes and proliferate and produce nuclear fuels. It will be a direction to develop new nuclear power.
The existing nuclear power system has many problems, such as low utilization ratio of natural resources, output of long life radioactive nuclear wastes and safety of operation etc. The transmutation technology by using accelerator-driven sub-critical reactor can generate not only clean nuclear power, but also can transmutate nuclear wastes and proliferate and produce nuclear fuels. It will be a direction to develop new nuclear power.
1999, 16(4): 273-277.
doi: 10.11804/NuclPhysRev.16.04.273
Abstract:
The main experimental groups in the world for measuring double-differential cross sections (DDX) of α-particles emission induced by neutron and two kinds of main spectrometers used are reviewed in the point of experimental view. Progress on experimental measurement of DDX in present stage is compared and development trend in future is discussed.
The main experimental groups in the world for measuring double-differential cross sections (DDX) of α-particles emission induced by neutron and two kinds of main spectrometers used are reviewed in the point of experimental view. Progress on experimental measurement of DDX in present stage is compared and development trend in future is discussed.
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