2000 Vol. 17, No. 4
Display Method:
2000, 17(4): 191-194.
doi: 10.11804/NuclPhysRev.17.04.191
Abstract:
A consistent treatment is extremely important in relativistic approaches. We emphasized the consistent approach in relativistic random phase approximation built on relativistic mean filed ground states. The consistent treatment requires that the studies of the ground state and excited states of giant resonances are based on same effective Lagrangian, and on a same complete set of basis. It was found that the effect of the Dirac states could not be neglected, especially in the case of giant...
A consistent treatment is extremely important in relativistic approaches. We emphasized the consistent approach in relativistic random phase approximation built on relativistic mean filed ground states. The consistent treatment requires that the studies of the ground state and excited states of giant resonances are based on same effective Lagrangian, and on a same complete set of basis. It was found that the effect of the Dirac states could not be neglected, especially in the case of giant...
2000, 17(4): 195-200.
doi: 10.11804/NuclPhysRev.17.04.195
Abstract:
Relativistic many body methods, which include the relativistic Brueckner Hartree Fock (RBHF) theory and the relativistic mean field (RMF) approach, were introduced, while their progress and application for nuclear matter and finite nuclei were presented. The open questions in this field and the trend in future were also discussed.
Relativistic many body methods, which include the relativistic Brueckner Hartree Fock (RBHF) theory and the relativistic mean field (RMF) approach, were introduced, while their progress and application for nuclear matter and finite nuclei were presented. The open questions in this field and the trend in future were also discussed.
2000, 17(4): 201-209.
doi: 10.11804/NuclPhysRev.17.04.201
Abstract:
The recent study of decomposition of gauge fields by means of methods of the geometric algebra was reviewed in detail. The new results in the study of the Euler characteristic by using the decomposition of gauge fields were described. On the other hand, some recent application fields of the decomposition of gauge fields and topological current theory were introduced. The new developments of the investigation in the area have also shown that the decomposition of gauge fields will provide...
The recent study of decomposition of gauge fields by means of methods of the geometric algebra was reviewed in detail. The new results in the study of the Euler characteristic by using the decomposition of gauge fields were described. On the other hand, some recent application fields of the decomposition of gauge fields and topological current theory were introduced. The new developments of the investigation in the area have also shown that the decomposition of gauge fields will provide...
2000, 17(4): 210-211.
doi: 10.11804/NuclPhysRev.17.04.210
Abstract:
The purpose and importance of the study of 9,11Be+209Bi near barrier fusion were reviewed. The breakup effects of the halo nuclei on fusion were discussed and compared with the experimental results of 9,11Be+209Bi systems.
The purpose and importance of the study of 9,11Be+209Bi near barrier fusion were reviewed. The breakup effects of the halo nuclei on fusion were discussed and compared with the experimental results of 9,11Be+209Bi systems.
2000, 17(4): 212-215.
doi: 10.11804/NuclPhysRev.17.04.212
Abstract:
Doppler shift attenuation lifetime measurements were performed in the 58 Ni( 23 Na,3p) reaction at 70 MeV and 58 Ni( 28 Si, α4p) reaction at 130 MeV. By analyzing the Doppler broadened line shapes of the 1 004 keV(10 -→8 -) negative parity transition in coincidence with depopulating transitions, the lifetime of the 10 - state has been deduced as τ =(2.2±0.3) ps. A similar analysis of 873 keV(8 -→6 -)transition gave values of τ =(1.6±0.2)...
Doppler shift attenuation lifetime measurements were performed in the 58 Ni( 23 Na,3p) reaction at 70 MeV and 58 Ni( 28 Si, α4p) reaction at 130 MeV. By analyzing the Doppler broadened line shapes of the 1 004 keV(10 -→8 -) negative parity transition in coincidence with depopulating transitions, the lifetime of the 10 - state has been deduced as τ =(2.2±0.3) ps. A similar analysis of 873 keV(8 -→6 -)transition gave values of τ =(1.6±0.2)...
2000, 17(4): 216-218.
doi: 10.11804/NuclPhysRev.17.04.216
Abstract:
HJ4/9]The configuration dependent shell correction approach with cranked Nilsson potential is employed for explaining the experimental high spin spectra in 127 La. The experimental high spin band with parity and signature (+, -1/2) consists of two parts with a crossing around I =20 . It is most like to have the configuration [02, 6], π (h 11/2 ) 2 ν (h 11/2 ) 6 and almost reaching the maximum angular momentum at I =47.5 . It is in normal deformation region with ...
HJ4/9]The configuration dependent shell correction approach with cranked Nilsson potential is employed for explaining the experimental high spin spectra in 127 La. The experimental high spin band with parity and signature (+, -1/2) consists of two parts with a crossing around I =20 . It is most like to have the configuration [02, 6], π (h 11/2 ) 2 ν (h 11/2 ) 6 and almost reaching the maximum angular momentum at I =47.5 . It is in normal deformation region with ...
2000, 17(4): 219-223.
doi: 10.11804/NuclPhysRev.17.04.219
Abstract:
By making use of the facility for radioactive beams which would be able to supply intense high resolution beams of short lived (radioactive) nuclei, the neutron proton ratio can be extended to extreme values, where some new phenomena such as neutron halo, proton halo, neutron skin, proton skin, growing evidence of the fragility or disappearance of shell structure far from stability, the importance of pairing correlation near drip line, and the possible existence of new superconducting phases of...
By making use of the facility for radioactive beams which would be able to supply intense high resolution beams of short lived (radioactive) nuclei, the neutron proton ratio can be extended to extreme values, where some new phenomena such as neutron halo, proton halo, neutron skin, proton skin, growing evidence of the fragility or disappearance of shell structure far from stability, the importance of pairing correlation near drip line, and the possible existence of new superconducting phases of...
2000, 17(4): 224-227.
doi: 10.11804/NuclPhysRev.17.04.224
Abstract:
Cooler Storage Ring (CSR), an upgrading program planned at the Heavy Ion Research Facility in Lanzhou (HIRFL), will supply beams with higher quality and intensity. Space charge effects should be considered due to this magnitude of intensity in CSR. The concept and some phenomena of space charge effects are discussed. Space charge intensity limit and space charge tune shift of normal CSR operation are given. It is of significance for the construction and operation of the future facility.
Cooler Storage Ring (CSR), an upgrading program planned at the Heavy Ion Research Facility in Lanzhou (HIRFL), will supply beams with higher quality and intensity. Space charge effects should be considered due to this magnitude of intensity in CSR. The concept and some phenomena of space charge effects are discussed. Space charge intensity limit and space charge tune shift of normal CSR operation are given. It is of significance for the construction and operation of the future facility.
2000, 17(4): 228-230.
doi: 10.11804/NuclPhysRev.17.04.228
Abstract:
High resolution depth profiling technique with elastic recoil detection analysis has been developed at the HI 13 tandem accelerator of CIAE. A depth resolution of 1.2 nm was achieved at the surface of the samples with the Q3D magnetic spectrometer and the focal plane detector. From light to medium heavy elements were simultaneous analyzed with a small Δ E E telescope. The method was applied to depth profile analysis of C/LiF multilayers, La 2SrCuO 4 superconductor and GaN foil samples.
High resolution depth profiling technique with elastic recoil detection analysis has been developed at the HI 13 tandem accelerator of CIAE. A depth resolution of 1.2 nm was achieved at the surface of the samples with the Q3D magnetic spectrometer and the focal plane detector. From light to medium heavy elements were simultaneous analyzed with a small Δ E E telescope. The method was applied to depth profile analysis of C/LiF multilayers, La 2SrCuO 4 superconductor and GaN foil samples.
2000, 17(4): 231-234.
doi: 10.11804/NuclPhysRev.17.04.231
Abstract:
In recent years, a new technique to detect the charteristic X ray from projectile ions in accelerator mass spectrometry (AMS) has been developed. After analysis in the routine AMS system, the ions are stopped in an appropriately chosen target in steat of an ion detector and induced X ray are detected for identification of ions by atomic number. For the application of AMS to higher mass isotopes with mass number>20 using small accelerator, the characteristic X rays technique is better...
In recent years, a new technique to detect the charteristic X ray from projectile ions in accelerator mass spectrometry (AMS) has been developed. After analysis in the routine AMS system, the ions are stopped in an appropriately chosen target in steat of an ion detector and induced X ray are detected for identification of ions by atomic number. For the application of AMS to higher mass isotopes with mass number>20 using small accelerator, the characteristic X rays technique is better...
2000, 17(4): 235-239.
doi: 10.11804/NuclPhysRev.17.04.235
Abstract:
Stacked polyethylene terephthalate films were irradiated with 35 MeV/u Ar ions at room temperature. The ion induced effects were studied by ultraviolet visible spectrometer, Fourier transform infrared spectroscopy, X ray diffractometer, X ray photoelectron spectroscopy, electron spin resonance spectroscopy and differential scanning calorimetry. Bond breaking and the formation of alkyne end groups and free radicals were observed. The bond breaking processes occurred mainly...
Stacked polyethylene terephthalate films were irradiated with 35 MeV/u Ar ions at room temperature. The ion induced effects were studied by ultraviolet visible spectrometer, Fourier transform infrared spectroscopy, X ray diffractometer, X ray photoelectron spectroscopy, electron spin resonance spectroscopy and differential scanning calorimetry. Bond breaking and the formation of alkyne end groups and free radicals were observed. The bond breaking processes occurred mainly...
2000, 17(4): 240-242.
doi: 10.11804/NuclPhysRev.17.04.240
Abstract:
The channeling radiation of high energy electrons and positrons in crystals was introduced. According to the new idea proposed by A.V.Korol, the coherent radiation of ultra relativistic electrons and positrons channeled in periodically bent crystals was analyzed. The characteristics of the radiation were obtained by using classic electromagnetic theory and a tentative experimental plan for testing was suggested.
The channeling radiation of high energy electrons and positrons in crystals was introduced. According to the new idea proposed by A.V.Korol, the coherent radiation of ultra relativistic electrons and positrons channeled in periodically bent crystals was analyzed. The characteristics of the radiation were obtained by using classic electromagnetic theory and a tentative experimental plan for testing was suggested.
2000, 17(4): 243-247.
doi: 10.11804/NuclPhysRev.17.04.243
Abstract:
The development of radiation curing was simply reviewed and the mechanism of UV curing and EB curing, the equipment and materials used in the radiation curing were also introduced. Compared with ordinary curing, the radiation curing has advantages of energy saving, high effectiveness and little pollution. It is a new technology of green industries facing the 21st century.
The development of radiation curing was simply reviewed and the mechanism of UV curing and EB curing, the equipment and materials used in the radiation curing were also introduced. Compared with ordinary curing, the radiation curing has advantages of energy saving, high effectiveness and little pollution. It is a new technology of green industries facing the 21st century.
2000, 17(4): 248-250.
doi: 10.11804/NuclPhysRev.17.04.248
Abstract:
Trace-elements in ancient ceramics and imitative ancient ceramics were determined by neutron activation analysis (NAA). The NAA data are then analyzed by fuzzy cluster method and the trend cluster diagram is obtained.The raw material sources of ancient ceramics and imitative ancient ceramics are determined. The path for improving quality of imitative ancient ceramics is found.
Trace-elements in ancient ceramics and imitative ancient ceramics were determined by neutron activation analysis (NAA). The NAA data are then analyzed by fuzzy cluster method and the trend cluster diagram is obtained.The raw material sources of ancient ceramics and imitative ancient ceramics are determined. The path for improving quality of imitative ancient ceramics is found.
2000, 17(4): 251-254.
doi: 10.11804/NuclPhysRev.17.04.251
Abstract:
The recent progresses in accelerator driven nuclear subcritical nuclear reactor, especially in target experimental data have been reviewed.The data contained all the isotopes producing cross sections. The reaction products were identified whether they came from the spallation or fission reaction .
The recent progresses in accelerator driven nuclear subcritical nuclear reactor, especially in target experimental data have been reviewed.The data contained all the isotopes producing cross sections. The reaction products were identified whether they came from the spallation or fission reaction .
2000, 17(4): 255-258.
doi: 10.11804/NuclPhysRev.17.04.255
Abstract:
Disposition of the reactor plutonium and high level actinides by using accelerator driven subcritical reactor was studied theoretically and the corresponding core model using liquid Bi alloy as the reactor coolant was proposed. The satisfied numerical results of neutronics, burn up and radioactivity were obtained by the ADVBISON code.
Disposition of the reactor plutonium and high level actinides by using accelerator driven subcritical reactor was studied theoretically and the corresponding core model using liquid Bi alloy as the reactor coolant was proposed. The satisfied numerical results of neutronics, burn up and radioactivity were obtained by the ADVBISON code.
2000, 17(4): 259-261.
doi: 10.11804/NuclPhysRev.17.04.259
Abstract:
The mass distribution of the phosphor fragments induced by projectile fragmentation reaction of 69 MeV/u 36Ar + 9Be was measured at the projectile fragment separator RIBLL at IMP. The fragment products were identified by determining the magnetic rigidity Bρ , the time of flight tTOF and their energy loss ΔE . The experimental isotope distribution was compared to the result of the empirical parameterization EPAX. Three events for the new nuclide 25P in the...
The mass distribution of the phosphor fragments induced by projectile fragmentation reaction of 69 MeV/u 36Ar + 9Be was measured at the projectile fragment separator RIBLL at IMP. The fragment products were identified by determining the magnetic rigidity Bρ , the time of flight tTOF and their energy loss ΔE . The experimental isotope distribution was compared to the result of the empirical parameterization EPAX. Three events for the new nuclide 25P in the...
2000, 17(4): 262-264.
doi: 10.11804/NuclPhysRev.17.04.262
Abstract:
Periodic orbits of two dimensional uncoupled quartic oscillator were calculated by inte grating Hamiltonian equations of motion on reasonable tori, and several classical quantities were also computed. Inserting them into Berry Tabor trace formula, a trace, i.e., the semiclassical density of states of the corresponding quantum system, was obtained. Finally, Fourier transform was adopted to verify the contribution of each periodic orbit. Good agreement between the semiclassical ...
Periodic orbits of two dimensional uncoupled quartic oscillator were calculated by inte grating Hamiltonian equations of motion on reasonable tori, and several classical quantities were also computed. Inserting them into Berry Tabor trace formula, a trace, i.e., the semiclassical density of states of the corresponding quantum system, was obtained. Finally, Fourier transform was adopted to verify the contribution of each periodic orbit. Good agreement between the semiclassical ...