### Abstract

Motivated by limitations of the Bloch-Horowitz-Brandow perturbative approach to nuclear structure we have developed the non-perturbative ab initio no core shell model (NCSM) capable of solving the properties of nuclei exactly for arbitrary nucleon-nucleon (NN) and NN+ three-nucleon (NNN) interactions with exact preservation of all symmetries. We present the complete ab initio NCSM formalism and review highlights obtained with it since its inception. These highlights include the first ab initio nuclear-structure calculations utilizing chiral NNN interactions, which predict the correct low-lying spectrum for ^{10}B and explain the anomalous long ^{14}C β-decay lifetime. We also obtain the small quadrupole moment of ^{6}Li. In addition to explaining long-standing nuclear structure anomalies, the ab initio NCSM provides a predictive framework for observables that are not yet measured or are not directly measurable. For example, reactions between short-lived systems and reaction rates near zero energy are relevant to fusion research but may not be known from experiment with sufficient precision. We, therefore, discuss, in detail, the extension of the ab initio NCSM to nuclear reactions and sketch a number of promising future directions for research emerging from the NCSM foundation, including a microscopic non-perturbative framework for the theory with a core. Having a parameter-free approach, we can construct systems with a core, which will provide an ab initio pathway to heavier nuclei.

Original language | English (US) |
---|---|

Pages (from-to) | 131-181 |

Number of pages | 51 |

Journal | Progress in Particle and Nuclear Physics |

Volume | 69 |

Issue number | 1 |

DOIs | |

State | Published - Mar 2013 |

### Fingerprint

### Keywords

- Nuclei
- Potentials
- Predictions
- Reactions
- Structure
- Theory

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

*Progress in Particle and Nuclear Physics*,

*69*(1), 131-181. https://doi.org/10.1016/j.ppnp.2012.10.003

**Ab initio no core shell model.** / Barrett, Bruce R; Navrátil, Petr; Vary, James P.

Research output: Contribution to journal › Article

*Progress in Particle and Nuclear Physics*, vol. 69, no. 1, pp. 131-181. https://doi.org/10.1016/j.ppnp.2012.10.003

}

TY - JOUR

T1 - Ab initio no core shell model

AU - Barrett, Bruce R

AU - Navrátil, Petr

AU - Vary, James P.

PY - 2013/3

Y1 - 2013/3

N2 - Motivated by limitations of the Bloch-Horowitz-Brandow perturbative approach to nuclear structure we have developed the non-perturbative ab initio no core shell model (NCSM) capable of solving the properties of nuclei exactly for arbitrary nucleon-nucleon (NN) and NN+ three-nucleon (NNN) interactions with exact preservation of all symmetries. We present the complete ab initio NCSM formalism and review highlights obtained with it since its inception. These highlights include the first ab initio nuclear-structure calculations utilizing chiral NNN interactions, which predict the correct low-lying spectrum for 10B and explain the anomalous long 14C β-decay lifetime. We also obtain the small quadrupole moment of 6Li. In addition to explaining long-standing nuclear structure anomalies, the ab initio NCSM provides a predictive framework for observables that are not yet measured or are not directly measurable. For example, reactions between short-lived systems and reaction rates near zero energy are relevant to fusion research but may not be known from experiment with sufficient precision. We, therefore, discuss, in detail, the extension of the ab initio NCSM to nuclear reactions and sketch a number of promising future directions for research emerging from the NCSM foundation, including a microscopic non-perturbative framework for the theory with a core. Having a parameter-free approach, we can construct systems with a core, which will provide an ab initio pathway to heavier nuclei.

AB - Motivated by limitations of the Bloch-Horowitz-Brandow perturbative approach to nuclear structure we have developed the non-perturbative ab initio no core shell model (NCSM) capable of solving the properties of nuclei exactly for arbitrary nucleon-nucleon (NN) and NN+ three-nucleon (NNN) interactions with exact preservation of all symmetries. We present the complete ab initio NCSM formalism and review highlights obtained with it since its inception. These highlights include the first ab initio nuclear-structure calculations utilizing chiral NNN interactions, which predict the correct low-lying spectrum for 10B and explain the anomalous long 14C β-decay lifetime. We also obtain the small quadrupole moment of 6Li. In addition to explaining long-standing nuclear structure anomalies, the ab initio NCSM provides a predictive framework for observables that are not yet measured or are not directly measurable. For example, reactions between short-lived systems and reaction rates near zero energy are relevant to fusion research but may not be known from experiment with sufficient precision. We, therefore, discuss, in detail, the extension of the ab initio NCSM to nuclear reactions and sketch a number of promising future directions for research emerging from the NCSM foundation, including a microscopic non-perturbative framework for the theory with a core. Having a parameter-free approach, we can construct systems with a core, which will provide an ab initio pathway to heavier nuclei.

KW - Nuclei

KW - Potentials

KW - Predictions

KW - Reactions

KW - Structure

KW - Theory

UR - http://www.scopus.com/inward/record.url?scp=84872335900&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84872335900&partnerID=8YFLogxK

U2 - 10.1016/j.ppnp.2012.10.003

DO - 10.1016/j.ppnp.2012.10.003

M3 - Article

VL - 69

SP - 131

EP - 181

JO - Progress in Particle and Nuclear Physics

JF - Progress in Particle and Nuclear Physics

SN - 0146-6410

IS - 1

ER -