Natural orbital description of the halo nucleus 6He

作     者：Chrysovalantis Constantinou Mark A.Caprio James P.Vary Pieter Maris 

作者机构：Present Address:Center for Theoretical PhysicsSloane Physics LaboratoryYale UniversityNew HavenCT 06520-8120USA Department of PhysicsUniversity of Notre DameNotre DameIN 46556-5670USA Department of Physics and AstronomyIowa State UniversityAmesIA 50011-3160USA 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2017年第28卷第12期

页      面：237-243页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：supported by the US Department of Energy,Office of Science,under Award Numbers DE-FG02-95ER-40934,DESC0008485(Sci DAC/NUCLEI) and DE-FG02-87ER40371 

主　　题：Neutron halo nucleus 6He Nuclear structure Nuclear theory 

摘      要：Ab initio calculations of nuclei face the challenge of simultaneously describing the strong short-range internucleon correlations and the long-range properties of weakly bound halo nucleons. Natural orbitals, which diagonalize the one-body density matrix, provide a basis which is better matched to the physical structure of the many-body wave function. We demonstrate that the use of natural orbitals significantly improves convergence for ab initio no-core configuration interaction calculations of the neutron halo nucleus ~6He, relative to the traditional oscillator basis.