High-precision spectroscopy of $^{20}$O benchmarking ab-initio calculations in light nuclei
Abstract
The excited states of unstable O were investigated via -ray spectroscopy following the OO reaction at 8 MeV. By exploiting the Doppler Shift Attenuation Method, the lifetime of the 2 and 3 states were firmly established. From the -ray branching and E2/M1 mixing ratios for transitions deexciting the 2 and 3 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 -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 EFT 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.
Keywords
Cite
@article{arxiv.2405.14305,
title = {High-precision spectroscopy of $^{20}$O benchmarking ab-initio calculations in light nuclei},
author = {I. Zanon and E. Clément and A. Goasduff and J. Menéndez and T. Miyagi and M. Assié and M. Ciemała and F. Flavigny and A. Lemasson and A. Matta and D. Ramos and M. Rejmund and L. Achouri and D. Ackermann and D. Barrientos and D. Beaumel and G. Benzoni and A. J. Boston and H. C. Boston and S. Bottoni and A. Bracco and D. Brugnara and G. de France and N. de Sereville and F. Delaunay and P. Desesquelles and F. Didierjean and C. Domingo-Prato and J. Dudouet and J. Eberth and D. Fernández and C. Fougères and A. Gadea and F. Galtarossa and V. Girard-Alcindor and V. Gonzales and A. Gottardo and F. Hammache and L. J. Harkness-Brennan and H. Hess and D. S Judson and A. Jungclaus and A. Kaşkaş and Y. H. Kim and A. Kuşoğlu and M. Labiche and S. Leblond and C. Lenain and S. M. Lenzi and S. Leoni and H. Li and J. Ljungvall and J. Lois-Fuentes and A. Lopez-Martens and A. Maj and R. Menegazzo and D. Mengoni and C. Michelagnoli and B. Million and D. R. Napoli and J. Nyberg and G. Pasqualato and Zs. Podolyak and A. Pullia and B. Quintana and F. Recchia and D. Regueira-Castro and P. Reiter and K. Rezynkina and J. S. Rojo and M. D. Salsac and E. Sanchis and M. Şenyiğit and M. Siciliano and D. Sohler and O. Stezowski and Ch. Theisen and A. Utepov and J. J. Valiente-Dobón and D. Verney and M. Zielinska},
journal= {arXiv preprint arXiv:2405.14305},
year = {2024}
}
Comments
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