A conception of the single-neutron microbeam facility was put forward in this paper. The specific particle (e.g. H+, 2d+ or a ) bombarding a specific target can generate neutron, when the particle energy is more than ...A conception of the single-neutron microbeam facility was put forward in this paper. The specific particle (e.g. H+, 2d+ or a ) bombarding a specific target can generate neutron, when the particle energy is more than a threshold (e.g., H+ energy is more than 2 MeV). And if the specific beam spot on the target is very small, the neutron beam along the direction of the specific beam spot will be very small too. If the neutron beam is weak and a neutron detector is mounted after the specific neutron collimator, the single- neutron will be obtained. Therefore, if the specific target and the neutron detector are installed after the proton accelerator and the microbeam system, the single-neutron microbeam will probably be obtained.展开更多
In the framework of the relativistic mean field theory combined with the complex momentum representation method,we elucidate the pseudospin symmetry in the single-neutron resonant states and its dependence on the σ,...In the framework of the relativistic mean field theory combined with the complex momentum representation method,we elucidate the pseudospin symmetry in the single-neutron resonant states and its dependence on the σ,ω,and ρ meson fields.Compared with the effect of theρfield,the τandωfields provide the main contributions to the pseudospin energy and width splitting of the resonant pseudospin doublets.Especially,we compare quantitatively the pseudospin wave functions's plittings in resonant doublets,and investigate their dependencies on different fields of mesons,which is consistent with that of energy and width splittings.Current research is helpful to understand the mechanism and properties of pseudospin symmetry for resonant states.展开更多
基金The project supported by the Nature Science Foundation Committee of Anhui Province (No. 01046201)
文摘A conception of the single-neutron microbeam facility was put forward in this paper. The specific particle (e.g. H+, 2d+ or a ) bombarding a specific target can generate neutron, when the particle energy is more than a threshold (e.g., H+ energy is more than 2 MeV). And if the specific beam spot on the target is very small, the neutron beam along the direction of the specific beam spot will be very small too. If the neutron beam is weak and a neutron detector is mounted after the specific neutron collimator, the single- neutron will be obtained. Therefore, if the specific target and the neutron detector are installed after the proton accelerator and the microbeam system, the single-neutron microbeam will probably be obtained.
基金Supported by the National Natural Science Foundation of China(11935001,11805004)the Key Research Foundation of Education Ministry of Anhui Province(KJ2018A0028)+1 种基金the Natural Science Foundation of Anhui Province(2008085MA26)Heavy Ion Research Facility in Lanzhou(HIRFL)。
文摘In the framework of the relativistic mean field theory combined with the complex momentum representation method,we elucidate the pseudospin symmetry in the single-neutron resonant states and its dependence on the σ,ω,and ρ meson fields.Compared with the effect of theρfield,the τandωfields provide the main contributions to the pseudospin energy and width splitting of the resonant pseudospin doublets.Especially,we compare quantitatively the pseudospin wave functions's plittings in resonant doublets,and investigate their dependencies on different fields of mesons,which is consistent with that of energy and width splittings.Current research is helpful to understand the mechanism and properties of pseudospin symmetry for resonant states.
