Nature of low-lying electric dipole resonance excitations in Ge 74

D. Negi, M. Wiedeking, E. G. Lanza, E. Litvinova, A. Vitturi, R. A. Bark, L. A. Bernstein, D. L. Bleuel, S. Bvumbi, T. D. Bucher, B. H. Daub, T. S. Dinoko, J. L. Easton, A. Görgen, M. Guttormsen, P. Jones, B. V. Kheswa, N. A. Khumalo, A. C. Larsen, E. A. LawrieJ. J. Lawrie, S. N.T. Majola, L. P. Masiteng, M. R. Nchodu, J. Ndayishimye, R. T. Newman, S. P. Noncolela, J. N. Orce, P. Papka, L. Pellegri, T. Renstrøm, D. G. Roux, R. Schwengner, O. Shirinda, S. Siem

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Isospin properties of dipole excitations in Ge74 are investigated using the (α,α′γ) reaction and compared to (γ,γ′) data. The results indicate that the dipole excitations in the energy region of 6 to 9 MeV adhere to the scenario of the recently found splitting of the region of dipole excitations into two separated parts: one at low energy, being populated by both isoscalar and isovector probes, and the other at high energy, excited only by the electromagnetic probe. Relativistic quasiparticle time blocking approximation (RQTBA) calculations show a reduction in the isoscalar E1 strength with an increase in excitation energy, which is consistent with the measurement.

Original languageEnglish
Article number024332
JournalPhysical Review C
Issue number2
Publication statusPublished - 23 Aug 2016
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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