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Nonperturbative shell-model interactions from the in-medium similarity renormalization group

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arxiv 1402.1407 v2 pith:3PDXDIWR submitted 2014-02-06 nucl-th nucl-ex

Nonperturbative shell-model interactions from the in-medium similarity renormalization group

S. K. Bogner , H. Hergert , J. D. Holt , A. Schwenk , S. Binder , A. Calci , J. Langhammer , R. Roth This is my paper
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keywords groupin-mediuminteractionsrenormalizationsimilarityagreementappliedbasis
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We present the first ab initio construction of valence-space Hamiltonians for medium-mass nuclei based on chiral two- and three-nucleon interactions using the in-medium similarity renormalization group. When applied to the oxygen isotopes, we find experimental ground-state energies are well reproduced, including the flat trend beyond the drip line at 24O. Similarly, natural-parity spectra in 21,22,23,24O are in agreement with experiment, and we present predictions for excited states in 25,26O. The results exhibit a weak dependence on the harmonic-oscillator basis parameter and reproduce spectroscopy within the standard sd valence space.

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