TY  - JOUR
TI  - Comparission of E1 Response of 154Sm and 155Sm in the Pygmy Dipole Resonance (PDR) Region
AB  - The dipole response associated with the pygmy dipole resonance (PDR) in 154Sm and 155Sm has been studied. Inthe 154Sm nucleus 1- phonons with K=0 and K=1 branches have been calculated using the Translation and GalileanInvariant Quasiparticle Random Phase Approximation (TGI-QRPA). The structure of the more pronouncedelectric dipole (E1) peaks in PDR region in 154Sm is composed of predominantly two-quasiproton or twoquasineutron states. The calculations in 155Sm has been performed in the framework of the Translation and GalileanInvariant Quasiparticle Phonon Nuclear Model (TGI-QPNM) based on the TGI-QRPA 1- phonons calculated for154Sm. When going from 154Sm to neighbouring 155Sm, the fragmentation of the E1 strength is dramaticallyenhanced. The results emphasize the role of the quasiparticle⨂phonon interactions in enhancing the fragmentationof the strength in the PDR region in 155Sm. Even though the strong fragmentation of the E1 strength obtained for155Sm, in 5-8 MeV energy region the summed E1 strength is comparable to that in 154Sm. The results indicate thatone quasiparticle behaves solely as a spectator in 155Sm.
AU  - Yakut, Hakan
AU  - Quliyev, Huseynqulu
AU  - TABAR, Emre
PY  - 2019
JO  - Bitlis Eren Üniversitesi Fen Bilimleri Dergisi
VL  - 8
IS  - XII. International Conference on Nuclear Structure Properties (NSP 2019) Özel Sayı
SN  - 2147-3129
SP  - 56
EP  - 60
DB  - TRDizin
UR  - http://search/yayin/detay/381962
ER  -