<i>Ab Initio</i>
 Limits of Atomic Nuclei

Stroberg, S. R.; Holt, J. D.; Schwenk, A.; Simonis, J.

doi:10.1103/physrevlett.126.022501

Cited by 160 publications

(157 citation statements)

References 64 publications

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“…The results from AME2016 20 are listed for 99,100 In ( a extrapolated mass value). For 101g,m In, the values are the weighted averages of two recent measurements performed at the FRS Ion Catcher at GSI 11 He charge radius), and gives accurate results for ground-state energies of light and medium-mass nuclei 26,31 . To further explore the sensitivity to chiral effective field theory interactions, we also consider the NN + 3N(lnl) interaction 32 that has proven to constitute a valuable addition to existing chiral Hamiltonians in medium-mass nuclei 33 but has yet to be tested in heavier systems.…”

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confidence: 96%

“…Odd systems thus provide a complementary and stringent testing ground for state-of-the-art theoretical approaches. Among ab initio approaches, the valence-space formulation of the in-medium similarity renormalization group (VS-IMSRG) 25 is able to access a broad range of closed-and open-shell nuclei in the nuclear chart 26 . In addition, we will explore the shell-model coupled-cluster (SMCC) method 27 in this region.…”

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confidence: 99%

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Mass measurements of 99–101In challenge ab initio nuclear theory of the nuclide 100Sn

et al. 2021

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The tin isotope 100Sn is of singular interest for nuclear structure due to its closed-shell proton and neutron configurations. It is also the heaviest nucleus comprising protons and neutrons in equal numbers—a feature that enhances the contribution of the short-range proton–neutron pairing interaction and strongly influences its decay via the weak interaction. Decay studies in the region of 100Sn have attempted to prove its doubly magic character1 but few have studied it from an ab initio theoretical perspective2,3, and none of these has addressed the odd-proton neighbours, which are inherently more difficult to describe but crucial for a complete test of nuclear forces. Here we present direct mass measurements of the exotic odd-proton nuclide 100In, the beta-decay daughter of 100Sn, and of 99In, with one proton less than 100Sn. We use advanced mass spectrometry techniques to measure 99In, which is produced at a rate of only a few ions per second, and to resolve the ground and isomeric states in 101In. The experimental results are compared with ab initio many-body calculations. The 100-fold improvement in precision of the 100In mass value highlights a discrepancy in the atomic-mass values of 100Sn deduced from recent beta-decay results4,5.

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confidence: 96%

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confidence: 99%

Mass measurements of 99–101In challenge ab initio nuclear theory of the nuclide 100Sn

et al. 2021

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“…One of the challenges in nuclear physics is to arrive to a unified description of all nuclei grounded on ab initio approaches using an Effective Field Theory (EFT) based on the symmetries and the relevant degrees of freedom of the QCD in the low-energy regime. Up to now ab initio predictions within the No-Core Shell Model (NCSM) or employing the Coupled-Cluster (CC) calculations were successful in describing ground and excited states of light nuclei even heavier than Oxygen [73]. The agreement of these results with experimental data demonstrated the potential of chiral EFT interactions, in particular of two-plus three-nucleon types.…”

Section: Interactions Properties From Light Nucleimentioning

confidence: 91%

Gamma spectroscopy with AGATA in its first phases: New insights in nuclear excitations along the nuclear chart

Bracco

Duchêne

Podolyák

et al. 2021

Progress in Particle and Nuclear Physics

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The Advanced GAmma Tracking Array (AGATA), the new generation high-resolution γray spectrometer, has seen the realization of the first phases of its construction and exploitation. A number of nuclear structure studies based on experiments utilizing the principle of γ -ray tracking were carried out in this decade. The combination of highest detection efficiency and position sensitivity allowed very selective spectroscopic studies with stable beams and the use of instable ion beams with the lowest intensities. Nuclear-structure studies commenced already at INFN-LNL (Legnaro, Italy) with a first implementation of the array consisting of five AGATA modules. A larger array of AGATA modules was used at GSI (Darmstadt, Germany) for experiments with unstable ion beams at relativistic energies. The spectrometer was then mounted in a beam line at GANIL (Caen, France). This review discusses several of the obtained results, underlying the progress made and future perspectives. The performed experiments give insights into nuclear structure issues which are connected to single particles, collective degrees of freedom, nucleon interactions and symmetries. Most of the investigated nuclei are located outside the stability line and for stable nuclei the investigations concern unexplored configurations. Altogether the obtained results represent advances which could test theory in exclusive way and motivate new theoretical developments.Opportunities for further γ -ray spectroscopy with the foreseen more advanced phase of the AGATA emerge in the discussions of the presented data.

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“…Nuclear theory has made impressive advances in the development of ab initio methods applicable from light to medium-mass nuclei up to A ∼ 100 and to nuclear matter [13,14,48]. Moreover, EDFs have been developed with a recent focus on theoretical uncertainties and EFT ideas for the construction of EDFs.…”

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confidence: 99%