Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2(+) state in C-16 and O-20
In: Physical Review C, Jg. 101 (2020), Heft 2
Online
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Zugriff:
To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2(+) state in neutron-rich O-20, tau(2(2)(+)) = 150(-30)(+80) fs, and an estimate for the lifetime of the second 2(+) state in C-16 have been obtained for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds of femtoseconds range by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction O-18 (7.0 MeV/u) + Ta-181. The requested sensitivity could only be reached owing to the excellent performances of the Advanced gamma-Tracking Array AGATA, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The experimental lifetimes agree with predictions of ab initio calculations using two- and three-nucleon interactions, obtained with the valence-space in-medium similarity renormalization group for O-20 and with the no-core shell model for C-16. The present measurement shows the power of electromagnetic observables, determined with high-precision gamma spectroscopy, to assess the quality of first-principles nuclear structure calculations, complementing common benchmarks based on nuclear energies. The proposed experimental approach will be essential for short lifetime measurements in unexplored regions of the nuclear chart, including r-process nuclei, when intense beams, produced by Isotope Separation On-Line (ISOL) techniques, become available.
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Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2(+) state in C-16 and O-20
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Autor/in / Beteiligte Person: | Ciemala, M. ; Ziliani, S. ; Crespi, F. C. L. ; Leoni, S. ; Fornal, B. ; Maj, A. ; Bednarczyk, P. ; Benzoni, G. ; Bracco, A. ; Boiano, C. ; Bottoni, S. ; Brambilla, S. ; Bast, M. ; Beckers, M. ; Braunroth, T. ; Camera, F. ; Cieplicka-Orynczak, N. ; Clement, E. ; Coelli, S. ; Dorvaux, O. ; Erturk, S. ; de France, G. ; Fransen, C. ; Goldkuhle, A. ; Grebosz, J. ; Harakeh, M. N. ; Iskra, L. W. ; Jacquot, B. ; Karpov, A. ; Kicinska-Habior, M. ; Kim, Y. ; Kmiecik, M. ; Lemasson, A. ; Lenzi, S. M. ; Lewitowicz, M. ; Li, H. ; Matea, I ; Mazurek, K. ; Michelagnoli, C. ; Matejska-Minda, M. ; Million, B. ; Mueller-Gatermann, C. ; Nanal, V ; Napiorkowski, P. ; Napoli, D. R. ; Palit, R. ; Rejmund, M. ; Schmitt, Ch ; Stanoiu, M. ; Stefan, I ; Vardaci, E. ; Wasilewska, B. ; Wieland, O. ; Zieblinski, M. ; Zielinska, M. ; Atac, A. ; Barrientos, D. ; Birkenbach, B. ; Boston, A. J. ; Cederwall, B. ; Charles, L. ; Collado, J. ; Cullen, D. M. ; Desesquelles, P. ; Domingo-Pardo, C. ; Dudouet, J. ; Eberth, J. ; Gonzalez, V ; Goupil, J. ; Harkness-Brennan, L. J. ; Hess, H. ; Judson, D. S. ; Jungclaus, A. ; Korten, W. ; Labiche, M. ; Alexis, L. ; Menegazzo, R. ; Mengoni, D. ; Nyberg, Johan ; Perez-Vidal, R. M. ; Podolyak, Zs ; Pullia, A. ; Recchia, F. ; Reiter, P. ; Saillant, F. ; Salsac, M. D. ; Sanchis, E. ; Stezowski, O. ; Theisen, C. ; Valiente-Dobon, J. J. ; Holt, J. D. ; Menendez, J. ; Schwenk, A. ; Simonis, J. |
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Zeitschrift: | Physical Review C, Jg. 101 (2020), Heft 2 |
Veröffentlichung: | 2020 |
Medientyp: | unknown |
ISSN: | 2469-9985 (print) |
DOI: | 10.1103/PhysRevC.101.021303 |
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