Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.242501
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Funding
- Deutsche Forschungsgemeinschaft [ZI 510/10-1]
- U.S. Depart-ment of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- National Science Foundation (NSF) [PHY-2012522]
- Extreme Light Infrastructure Nuclear Physics (ELI-NP) Phase II
- Romanian Government
- European Union through the European Regional Development Fund the Competitiveness Operational Programme [1/07.07.2016, 1334]
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The microscopic structure of the low-energy electric dipole response in Sn-120, known as pygmy dipole resonance (PDR), was studied in an experiment by comparing experimental data with a novel theoretical approach. The results demonstrate the importance of understanding the one-particle-one-hole structures of the 1(-) states in the PDR region for reliably predicting PDR properties and its contribution to nucleosynthesis processes.
The microscopic structure of the low-energy electric dipole response, commonly denoted as pygmy dipole resonance (PDR), was studied for Sn-120 in a Sn-119(d, p gamma)Sn-120 experiment. Unprecedented access to the single-particle structure of excited 1(-) states below and around the neutron-separation threshold was obtained by comparing experimental data to predictions from a novel theoretical approach. The novel approach combines detailed structure input from energy-density functional plus quasiparticle-phonon model theory with reaction theory to obtain a consistent description of both the structure and reaction aspects of the process. The presented results show that the understanding of one-particle-one-hole structures of the 1(-) states in the PDR region is crucial to reliably predict properties of the PDR and its contribution to nucleosynthesis processes.
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