Ab Initio Large-Basis No-Core Shell Model.

Barrett, B. R. ; Navratil, P. ; Nogga, A. ; Ormand, W. E. ; Stetcu, I. ; Vary, J. P. ; Zhan, H.

Technical Information Center Oak Ridge Tennessee

关键词: Ab initio;    Radiation physics;    Excitation;    Hamiltonians;    Motivation;   

RP-ID  :  DE200515011511

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We discuss the motivation, theory, and formulation of the ab initio No-Core Shell Model (NCSM). In this method the effective Hamiltonians are derived microscopically from realistic nucleon-nucleon (NN) and theoretical three-nucleon (NNN) potentials, as a function of the finite harmonic-oscillator (HO) basis space. We present converged results for the A = 3 and 4 nucleon systems, which are in agreement with results obtained by other exact methods, followed by results for p-shell nuclei. Binding energies, rms radii, excitation spectra, and electromagnetic properties are discussed. The favorable comparison with available data is a consequence of the underlying NN and NNN interactions rather than a phenomenological fit.