Nuclear excitation of Pygmy Dipole Resonance

14th Conference on Theoretical Nuclear Physics in Italy

Lanza, Edoardo G.^1,2 ; Vitturi, Andrea^3,4 ; Andrés, M Victoria^5 ; Catara, Francesco^1,2

INFN-Sezione di Catania, 95123 Catania, Italy^1

Dipartimento di Fisica e Astronomia, 95123 Catania, Italy^2

Dipartimento di Fisica e Astronomia, 35131 Padova, Italy^3

INFN-Sezione di Padova, 35131 Padova, Italy^4

Departamento de Física Atomica, Molecular y Nuclear, Sevilla 41080, Spain^5

关键词: Incident energy;    Neutron excess;    Nuclear excitation;    Nuclear fields;    Pygmy dipole resonances;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/527/1/012006/pdf
DOI  :  10.1088/1742-6596/527/1/012006

来源: IOP

【 摘 要 】

Excitations of Pygmy Dipole Resonance (PDR), generated by a nuclear field, are studied within a semiclassical RPA based model. This is possible since the PDR, present in almost all nuclei with neutron excess, has a strong isoscalar character. Our results show that the employ of isoscalar probes finds its best use at incident energies below 50 MeV/u. The structural splitting of the low-lying E1 strength, found in recent (α,α'γ) experiments, is corroborated by our cross section calculations.