TY  - JOUR
TT  - Comparission of E1 Response of 154Sm and 155Sm in the Pygmy Dipole Resonance (PDR) Region
AU  - Quliyev, Huseynqulu
AU  - Yakut, Hakan
AU  - Tabar, Emre
PY  - 2019
DA  - December
Y2  - 2019
DO  - 10.17798/bitlisfen.635427
JF  - Bitlis Eren Üniversitesi Fen Bilimleri Dergisi
PB  - Bitlis Eren University
WT  - DergiPark
SN  - 2147-3129
SP  - 56
EP  - 60
VL  - 8
LA  - en
KW  - TGI-QRPA
KW  - TGI-QPNM
KW  - PDR
KW  - 154Sm
KW  - 155Sm
KW  - E1
N2  - The dipole response associated with the pygmy dipoleresonance (PDR) in 154Sm and 155Sm has been studied. Inthe 154Sm nucleus 1- phonons with K=0 and K=1 branches havebeen calculated using the Translation and Galilean Invariant QuasiparticleRandom Phase Approximation (TGI-QRPA). The structure of the more pronouncedelectric dipole (E1) peaks in PDRregion in 154Sm is composed of predominantly two-quasiproton ortwo-quasineutron states. The calculations in 155Sm has beenperformed in the framework of the Translation and Galilean Invariant QuasiparticlePhonon Nuclear Model (TGI-QPNM) based on theTGI-QRPA 1- phonons calculated for 154Sm. When going from154Sm to neighbouring 155Sm, the fragmentation of the E1 strength is dramatically enhanced.The results emphasize the role of the quasiparticle⨂phonon interactions in enhancing the fragmentation of the strength inthe PDR region in 155Sm. Even though the strong fragmentation of theE1 strength obtained for 155Sm,in 5-8 MeV energy region the summed E1strength is comparable to that in 154Sm. The results indicate thatone quasiparticle behaves solely as a spectator in 155Sm.
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UR  - https://doi.org/10.17798/bitlisfen.635427
L1  - https://dergipark.org.tr/en/download/article-file/909968
ER  -