New Precision Mass Measurements of Neutron-Rich Calcium and Potassium Isotopes and Three-Nucleon Forces

Gallant, A. T.; Bale, J.C.; Brunner, T.; Chowdhury, U.; Ettenauer, S.; Lennarz, A.; Robertson, D.; Simon, Vanessa V.; Chaudhuri, A.; Holt, J. D.; Kwiatkowski, A. A.; Mané, E.; Menéndez, J. Fernández; Schultz, B. E.; Simon, M. C.; Andreoiu, C.; Delheij, P. P. J.; Pearson, M. R.; Savajols, H.; Schwenk, A.; Dilling, J.

doi:10.1103/physrevlett.109.032506

Cited by 113 publications

(121 citation statements)

References 46 publications

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“…However, new high-precision measurements using a Penning trap show excellent agreement with the MBPT predictions (see figure 20) [60]. Once again, the theoretical ingredients are SPEs and residual two-body interactions, which are all calculated microscopically from NN and 3N forces [60,61].…”

Section: Many-body Perturbation Theory In Finite Nucleimentioning

confidence: 77%

New applications of renormalization group methods in nuclear physics

2013

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Abstract. We review recent developments in the use of renormalization group (RG) methods in low-energy nuclear physics. These advances include enhanced RG technology, particularly for three-nucleon forces, which greatly extends the reach and accuracy of microscopic calculations. We discuss new results for the nucleonic equation of state with applications to astrophysical systems such as neutron stars, new calculations of the structure and reactions of finite nuclei, and new explorations of correlations in nuclear systems.

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Section: Many-body Perturbation Theory In Finite Nucleimentioning

confidence: 77%

New applications of renormalization group methods in nuclear physics

2013

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“…Without these initial 3N forces, the spectra of 25,26 F are much too compressed, but with their addition, the IM-SRG spectra are in reasonable agreement with predictions from phenomenology [23]. More generally, 3N forces are necessary to reproduce properties of exotic nuclei near oxygen and calcium [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. In this work, we extend this approach to the ensemble normal-ordering procedure outlined in Ref.…”

Section: Modelsmentioning

confidence: 82%

Effective proton-neutron interaction near the drip line from unbound states in F25,26

Vandebrouck¹,

Lepailleur²,

Sorlin³

et al. 2017

Phys. Rev. C

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Background: Odd-odd nuclei, around doubly closed shells, have been extensively used to study proton-neutron interactions. However, the evolution of these interactions as a function of the binding energy, ultimately when nuclei become unbound, is poorly known. The 26 F nucleus, composed of a deeply bound π 0d 5/2 proton and an unbound ν0d 3/2 neutron on top of an 24 O core, is particularly adapted for this purpose. The coupling of this proton and neutron results in a J π = 1 1 + − 4 1 + multiplet, whose energies must be determined to study the influence of the proximity of the continuum on the corresponding proton-neutron interaction. The J π = 1 1 + , 2 1 + , 4 1 + bound states have been determined, and only a clear identification of the J π = 3 1 + is missing. Purpose: We wish to complete the study of the J π = 1 1 + − 4 1 + multiplet in 26 F, by studying the energy and width of the J π = 3 1 + unbound state. The method was first validated by the study of unbound states in 25 F, for which resonances were already observed in a previous experiment. Method: Radioactive beams of 26 Ne and 27 Ne, produced at about 440A MeV by the fragment separator at the GSI facility were used to populate unbound states in 25 F and 26 F via one-proton knockout reactions on a CH 2 target, located at the object focal point of the R 3 B/LAND setup. The detection of emitted γ rays and neutrons, added to the reconstruction of the momentum vector of the A − 1 nuclei, allowed the determination of the energy of three unbound states in 25 F and two in 26 F. Results: Based on its width and decay properties, the first unbound state in 25 F, at the relative energy of 49(9) keV, is proposed to be a J π = 1/2 − arising from a p 1/2 proton-hole state. In 26 F, the first resonance at 323(33) keV is proposed to be the J π = 3 1 + member of the J π = 1 1 + − 4 1 + multiplet. Energies of observed states in 25,26 F have been compared to calculations using the independent-particle shell model, a phenomenological shell model, and the ab initio valence-space in-medium similarity renormalization group method. Conclusions: The deduced effective proton-neutron interaction is weakened by about 30-40% in comparison to the models, pointing to the need for implementing the role of the continuum in theoretical descriptions or to a wrong determination of the atomic mass of 26 F.

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“…Our calculations confirm and extend these results within a full-fledged ab initio approach for the first time. [28][29][30]. Results from shell-model calculations with chiral 3NFs (solid line) [19,30] and coupled cluster (dashed line) [9] are also shown.…”

Section: -2mentioning

confidence: 99%

Chiral two- and three-nucleon forces along medium-mass isotope chains

et al. 2014

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Ab initio calculations have shown that chiral two-and three-nucleon interactions correctly reproduce binding energy systematics and neutron drip lines of oxygen and nearby isotopes. Exploiting the novel Gorkov-Green's function approach applicable to genuinely open-shell nuclei, we present the first ab initio investigation of Ar, K, Ca, Sc, and Ti isotopic chains. In doing so, stringent tests of internucleon interaction models are provided in the medium-mass region of the nuclear chart. Leading chiral three-nucleon interactions are shown to be mandatory to reproduce the trend of binding energies throughout these chains and to obtain a good description of two-neutron separation energies. At the same time, nuclei in this mass region are systematically overbound by about 40 MeV. While the fundamental N = 20 and 28 magic numbers do emerge from basic internucleon interactions, the former is shown to be significantly overestimated, which points to deficiencies of state-of-the-art chiral potentials. The present results demonstrate that ab initio many-body calculations can now access entire medium-mass isotopic chains including degenerate open-shell nuclei and provide a critical testing ground for modern theories of nuclear interactions.

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New Precision Mass Measurements of Neutron-Rich Calcium and Potassium Isotopes and Three-Nucleon Forces

Cited by 113 publications

References 46 publications

New applications of renormalization group methods in nuclear physics

New applications of renormalization group methods in nuclear physics

Effective proton-neutron interaction near the drip line from unbound states in F25,26

Chiral two- and three-nucleon forces along medium-mass isotope chains

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