%0 Journal Article
%T High-Precision Spectroscopy of O-20 Benchmarking Ab Initio Calculations in Light Nuclei
%A Zanon, I. et al
%A Domingo-Pardo, C.
%A Gadea, A.
%J Physical Review Letters
%D 2023
%V 131
%N 26
%I Amer Physical Soc
%@ 0031-9007
%G English
%F Zanon_etal2023
%O WOS:001153473000002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5977), last updated on Fri, 22 Mar 2024 08:47:12 +0000
%X The excited states of unstable O-20 were investigated via.-ray spectroscopy following the O-19(d, p)O-20 reaction at 8 AMeV. By exploiting the Doppler shift attenuation method, the lifetimes of the 2(2)(+) and 3(1)(+) states were firmly established. From the gamma-ray branching and E2/M1 mixing ratios for transitions deexciting the 2(2)(+) and 3(1)(+) 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 gamma-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.
%R 10.1103/PhysRevLett.131.262501
%U https://doi.org/10.1103/PhysRevLett.131.262501
%P 262501-7pp