Naslov
Proton Electric Pygmy Dipole Resonance

Autori
Paar, Nils ; Vretenar, Dario ; Ring, Peter

Izvornik
Physical review letters (0031-9007) 94 (2005), 18; 182501-4

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Nuclear mass and neutron distributions; Forces in hadronic systems and nuclear effective interactions; Hartree-Fock and random-phase approximations in nuclei; Nuclear giant resonances

Sažetak
The evolution of the low-lying E1 strength in proton-rich nuclei is analyzed in the framework of the self-consistent relativistic Hartree-Bogoliubov model and the relativistic quasiparticle random-phase approximation (RQRPA). Model calculations are performed for a series of N=20 isotones and Z=18 isotopes. For nuclei close to the proton drip line, the occurrence of pronounced dipole peaks is predicted in the low-energy region below 10 MeV excitation energy. From the analysis of the proton and neutron transition densities and the structure of the RQRPA amplitudes, it is shown that these states correspond to the proton pygmy dipole resonance.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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