摘要
用反射不对称相对论平均场理论(Reflection Asymmetric Relativistic Mean Field,i.e.:RAS-RMF)对Ce同位素链的基态性质及形状演化进行了研究.结果表明:引入反射不对称自由度自由度,RMF理论能很好地描述Ce同位素的基态性质,计算的结合能与实验数据符合得相当好,获得的形变参数、单粒子能级、物质密度分布及位能曲线清晰地展现出偶偶核Ce同位素的形状演化.
The ground state properties and the shape evolution of Ce isotopes are investigated by the Reflection Asymmetric Relativistic Mean Field （RAS-RMF） theory. Calculations show that the RAS-RMF theory presents a better description on the properties of ground states for the consideration of reflecting asymmetric degree of freedom. The calculated binding energy agrees the experimental data well. The shape evolution of even-even Ce isotopes is shown clearly from the spherical 140 Ce to the quadrupole deformation 144Ce, and well-developed octupole deformation 146–152Ce, and finally back to quadrupole deformation 156Ce from the calculated deformations, single particle neutron energies, matter density distributions and potential energy surfaces.
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2013年第1期69-75,共7页
Scientia Sinica Physica,Mechanica & Astronomica
关键词
反射不对称相对论平均场
形状演化和相变
八极形变
reflection asymmetric relativistic mean field
shape evolution and phase transition
octupole deformation
