Emergence of Simple Patterns in Complex Atomic Nuclei from First Principles

T Dytrych,J P Draayer,T Oberhuber,K D Launey,P Maris,D Langr,J P Vary

doi:10.1088/1742-6596/639/1/012008

Abstract

We study the structure of low-lying states in 6Li, 6He, 8Be, 8B, 12C, and 16O, using ab initio symmetry-adapted no-core shell model. The results of our study demonstrate that collective modes in light nuclei emerge from first principles. We investigate the impact of the symmetry-adapted model space on spectroscopic properties and, in the case of the ground state of 6Li, on elastic electron scattering charge form factor. The results confirm that only a small symmetry-adapted subspace of the complete model space is needed to accurately reproduce complete-space observables and the form factor momentum dependence.

Highlights

Over the past decade, major progress in the development of realistic internucleon interactions along with the emergence of petascale computing resources have advanced considerably predictive capabilities of ab initio methods
The progress is hindered by the nearly combinatorial growth of many-nucleon basis, that comes with the addition of oscillator shells and the number of nucleons
We developed a novel symmetryadapted framework that augments ab initio no-core shell model with manynucleon basis constructed using SU(3)-based coupling scheme

Summary

Introduction

Major progress in the development of realistic internucleon interactions along with the emergence of petascale computing resources have advanced considerably predictive capabilities of ab initio methods.

Results

Conclusion