Year: 2024
Type: article
Abstract: Lifetimes of higher-lying states ( $$2_2^+$$ 2 2 + and $$4_1^+$$ 4 1 + ) in $$^{16}$$ 16 C have been measured, employing the Gammasphere and Microball detector arrays, as key observables to test and refine ab initio calculations based on interactions developed within chiral Effective Field Theory. The presented experimental constraints to these lifetimes of $$\tau ({2_2^+}) = [\,244, 446]\,~\textrm{fs}$$ τ ( 2 2 + ) = [ 244 , 446 ] fs and $$\tau ({4_1^+}) = [\,1.8, 4]\,~\textrm{ps}$$ τ ( 4 1 + ) = [ 1.8 , 4 ] ps , combined with previous results on the lifetime of the $$2_1^+$$ 2 1 + state of $$^{16}$$ 16 C, provide a rather complete set of key observables to benchmark the theoretical developments. We present No-Core Shell-Model calculations using state-of-the-art chiral 2- (NN) and 3-nucleon (3N) interactions at next-to-next-to-next-to-leading order for both the NN and the 3N contributions and a generalized natural-orbital basis (instead of the conventional harmonic-oscillator single-particle basis) which reproduce, for the first time, the experimental findings remarkably well. The level of agreement of the new calculations as compared to the CD-Bonn meson-exchange NN interaction is notable and presents a critical benchmark for theory.
Source: The European Physical Journal A
Institutions: Technische Universität Darmstadt, University of York, University of North Carolina at Chapel Hill, Argonne National Laboratory, Duke University, Triangle Universities Nuclear Laboratory, University of Milan, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Lawrence Berkeley National Laboratory, Washington University in St. Louis, Oak Ridge National Laboratory, Florida State University, University of the Witwatersrand, iThemba Laboratory
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,790
Funders: National Science Foundation, U.S. Department of Energy, Royal Society, National Research Foundation, Deutsche Forschungsgemeinschaft, Directorate for Mathematical and Physical Sciences, Office of Science, Science and Technology Facilities Council, Nuclear Physics, Oak Ridge National Laboratory, Lawrence Berkeley National Laboratory
Awards: G102163711, G1079818582, G1143651532, G121915436, G1286236842, G138487567, G1645119126, G1760870335, WoU-MMA: Studies of Nuclear Structure and Nuclear Astrophysics, G1863003419, G203625172, G2287611682, G2411683797, G2504282314, G262962599, G275679244, G2821925151, G2880639702, G2896472831, G2988778103, G3083819904, G3416279796, G3479632140, G3554316960, G3685081974, G3945850812, G3976335900, G4158950854, Nuclear Physics Consolidated Grant, G419881185, G42916606, G4423657506, G4501827968, G498139845, G513797252, G660579501, G6652958823, G675320460, G6848031779, G6918803902, G7082598299, G7354628648, SFB 1245: Atomkerne: Von fundamentalen Wechselwirkungen zu Struktur und Sternen, Nuclear Physics Consolidated Grant, G7963890379, G8111186843, G8269158468, G8286507625, G8371644053, G8906985441, G89955983, G9000303661, G969889393, G993149817
OpenAlex ID: W4402493668