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Dergiler / Bitlis Eren Üniversitesi Fen Bilimleri Dergisi / 2019 / Volume: 8 Special Issue

Comparission of E1 Response of 154Sm and 155Sm in the Pygmy Dipole Resonance (PDR) Region

Hakan Yakut(Sakarya Üniversitesi)0000-0002-3903-5863
Emre Tabar(sakarya üniversitesi)0000-0002-5093-9409
Huseynqulu Quliyev(sakarya üniversitesi)0000-0002-6306-658X
Sayfa
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Yayın Tarihi
2019-12-31
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The results indicate that one quasiparticle behaves solely as a spectator in 155 Sm.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:The dipole response associated with the pygmy dipole resonance (PDR) in 154 Sm and 155 Sm has been studied.
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Temel Bulgular & Veri:In the 154 Sm nucleus 1 - phonons with K =0 and K =1 branches have been calculated using the Translation and Galilean Invariant Quasiparticle Random Phase Approximation (TGI-QRPA).
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Sonuç & Katkı:The results indicate that one quasiparticle behaves solely as a spectator in 155 Sm.
🔬Tür:Modelleme & Sayısal Simülasyon
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:TGI-QRPA · TGI-QPNM · PDR

Özet

The dipole response associated with the pygmy dipole resonance (PDR) in 154 Sm and 155 Sm has been studied. In the 154 Sm nucleus 1 - phonons with K =0 and K =1 branches have been calculated using the Translation and Galilean Invariant Quasiparticle Random Phase Approximation (TGI-QRPA). The structure of the more pronounced electric dipole ( E 1) peaks in PDR region in 154 Sm is composed of predominantly two-quasiproton or two-quasineutron states. The calculations in 155 Sm has been performed in the framework of the Translation and Galilean Invariant Quasiparticle Phonon Nuclear Model (TGI- QPNM) based on the TGI-QRPA 1 - phonons calculated for 154 Sm. When going from 154 Sm to neighbouring 155 Sm, the fragmentation of the E 1 strength is dramatically enhanced. The results emphasize the role of the quasiparticle ⨂ phonon interactions in enhancing the fragmentation of the strength in the PDR region in 155 Sm. Even though the strong fragmentation of the E 1 strength obtained for 155 Sm, in 5-8 MeV energy region the summed E 1 strength is comparable to that in 154 Sm. The results indicate that one quasiparticle behaves solely as a spectator in 155 Sm.

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Bu Makaleye Atıf Yap

Yakut, H., Tabar, E., Quliyev, H. (2019). Comparission of E1 Response of 154Sm and 155Sm in the Pygmy Dipole Resonance (PDR) Region. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, Volume: 8 Special Issue. https://doi.org/10.17798/bitlisfen.635427

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