摘要
The atomic nucleus is a self-organized system composed of protons and neutrons through the short-range attractive nuclear force.For protons there is a long-range Coulomb repulsion, while no Coulomb interaction exists between neutrons. Then, a naive question arises:can a pure neutron system exist? A pure neutron system seems to be more bound because there is no Coulomb repulsion between neutrons. However, no bound pure neutron system has been found except in neutron stars where neutrons are squeezed together by the huge gravitational force.
作者
Furong Xu
许甫荣(State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China)
基金
support from the National Natural Science Foundation of China(11835001,11921006,and 12035001)。
