High-Precision Spectroscopy of 20O Benchmarking Ab Initio Calculations in Light 
Nuclei

Zanon, I.; Clément, E.; Goasduff, A.; Menéndez, J.; Miyagi, T.; Assié, M.; Ciemała, M.; Flavigny, F.; Lemasson, A.; Matta, A.; Ramos, D.; Rejmund, M.; Achouri, L.; Ackermann, D.; Barrientos, D.; Beaumel, D.; Benzoni, G.; Boston, A. J.; Boston, H. C.; Bottoni, S.; Bracco, A.; Brugnara, D.; de France, G.; de Sereville, N.; Delaunay, F.; Desesquelles, P.; Didierjean, F.; Domingo-Prato, C.; Dudouet, J.; Eberth, J.; Fernández, D.; Fougères, C.; Gadea, A.; Galtarossa, F.; Girard-Alcindor, V.; Gonzales, V.; Gottardo, A.; Hammache, F.; Harkness-Brennan, L. J.; Hess, H.; Judson, D. S.; Jungclaus, A.; Kaşkaş, A.; Kim, Y. H.; Kuşoğlu, A.; Labiche, M.; Leblond, S.; Lenain, C.; Lenzi, S. M.; Leoni, S.; Li, H.; Ljungvall, J.; Lois-Fuentes, J.; Lopez-Martens, A.; Maj, A.; Menegazzo, R.; Mengoni, D.; Michelagnoli, C.; Million, B.; Napoli, D. R.; Nyberg, J.; Pasqualato, G.; Podolyak, Zs.; Pullia, A.; Quintana, B.; Recchia, F.; Regueira-Castro, D.; Reiter, P.; Rezynkina, K.; Rojo, J. S.; Salsac, M. D.; Sanchis, E.; Şenyiğit, M.; Siciliano, M.; Sohler, D.; Stezowski, O.; Theisen, Ch.; Utepov, A.; Valiente-Dobón, J. J.; Verney, D.; Zielinska, M.

doi:10.1103/PhysRevLett.131.262501

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High-Precision Spectroscopy of ²⁰O Benchmarking Ab Initio Calculations in Light Nuclei

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Miyagi, T.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.131.262501
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Citation

Zanon, I., Clément, E., Goasduff, A., Menéndez, J., Miyagi, T., Assié, M., et al. (2023). High-Precision Spectroscopy of ²⁰O Benchmarking Ab Initio Calculations in Light Nuclei. Physical Review Letters, 131(26): 262501. doi:10.1103/PhysRevLett.131.262501.

Cite as: https://hdl.handle.net/21.11116/0000-000E-42DF-D

Abstract

The excited states of unstable ²⁰O were investigated via γ-ray spectroscopy following the ¹⁹O(d,p)²⁰O reaction at 8 AMeV. By exploiting the Doppler shift attenuation method, the lifetimes of the 2₂⁺ and 3₁⁺ states were firmly established. From the γ-ray branching and E2/M1 mixing ratios for transitions deexciting the 2₂⁺ and 3₁⁺ states, the B(E2) and B(M1) were determined. Various chiral effective field theory Hamiltonians, describing the nuclear properties beyond ground states, along with a standard USDB interaction, were compared with the experimentally obtained data. Such a comparison for a large set of γ-ray transition probabilities with the valence space in medium similarity renormalization group ab initio calculations was performed for the first time in a nucleus far from stability. It was shown that the ab initio approaches using chiral effective field theory forces are challenged by detailed high-precision spectroscopic properties of nuclei. The reduced transition probabilities were found to be a very constraining test of the performance of the ab initio models.