Microscopic Structure of the Low-Energy Electric Dipole Response ofSn120,Physical Review Letters

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Microscopic Structure of the Low-Energy Electric Dipole Response ofSn120
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-12-06 , DOI: 10.1103/physrevlett.127.242501
M Weinert ₁ , M Spieker ₂ , G Potel ₃ , N Tsoneva ₄ , M Müscher ₁ , J Wilhelmy ₁ , A Zilges ₁

Affiliation

The microscopic structure of the low-energy electric dipole response, commonly denoted as pygmy dipole resonance (PDR), was studied for

{}^{120}{Sn}

in a

{}^{119}{Sn} (d, p γ) {}^{120}{Sn}

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