Ab initio no core shell model
Summary (1 min read)
3.2 6Lt, 'He
- In Table 2 and Fig. 3 , the authors present the ground-state energy, excitation spectra as well as several other observable results calculated with the CD- Bonn NN potential.
- While the energy of the ground-state eigenstate increases with increasing model space, the relative level spacings are less dependent on model-space size.
- The authors note that the favorable comparison with available data is a consequence of the underlying NN interaction rather than a phenomenological fit.
- The two-or higher-hQ dominated states, such as the 7.65 MeV O+O state, are not seen in the low-lying part of their calculated spectra.
- The authors expect this state eventually to change its structure and become the cluster state.
4 Conclusions
- In the present contribution, the authors described the ab inztzo no-core shell-model approach and discussed its application to the lightest nuclei, 3H, 3He and 4He, for which they obtain converged results.
- Also, the authors showed their results €or 'Li, "He and "C. In these far more complex cases, they get close to convergence for A = 6.
- For 12C the authors do not reach full convergence, but nonetheless they obtain a reasonable approximation for the lowest OhCl-dominated states.
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Cites background or methods from "Ab initio no core shell model"
...Examples of ab initio approaches are the GFMC method (Pieper and Wiringa, 2001), the NCSM (Navrátil et al., 2009; Maris et al., 2009; Barrett et al., 2013), the self-consistent Green’s function method (Dickhoff and Barbieri, 2004; Barbieri and Hjorth-Jensen, 2009), lattice simulations (Lee, 2009),…...
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...…function Monte Carlo (GFMC) computations (Carlson, 1987; Pudliner et al., 1997; Pieper and Wiringa, 2001) and no-core shell-model (NCSM) computations (Navrátil et al., 2000; Navrátil et al., 2009; Barrett et al., 2013) convincingly demonstrated that p-shell nuclei can be computed from scratch....
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References
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