Pai, H. ; Beller, J. ; Benouaret, N. ; Enders, J. ; Hartmann, T. ; Karg, O. ; Neumann-Cosel, P. ; Pietralla, N. ; Ponomarev, V. Yu. ; Romig, C. ; Scheck, M. ; Schnorrenberger, L. ; Volz, S. ; Zweidinger, M. (2013):
Low-lying dipole strength in the N=28 shell-closure nucleus ⁵²Cr.
In: Physical Review C, 88 (5), pp. 054316 1-5. [Article]
Abstract
The low-lying dipole strength of the N=28 closed-shell nucleus ⁵²Cr was studied with nuclear resonance fluorescence up to 9.9 MeV, using bremsstrahlung at the superconducting Darmstadt linear electron accelerator S-DALINAC. Twenty-eight spin-1 states were observed between 5.0 and 9.5 MeV excitation energy, 14 of which for the first time. Both electric dipole excitations (E1, around 8 MeV) and magnetic dipole excitations (M1, around 9 MeV) were detected. Microscopic calculations within the quasiparticle-phonon nuclear model were performed and show good agreement with experimental results. The structure of E1 and M1 excitations, respectively, is discussed.
| Item Type: | Article |
|---|---|
| Erschienen: | 2013 |
| Creators: | Pai, H. ; Beller, J. ; Benouaret, N. ; Enders, J. ; Hartmann, T. ; Karg, O. ; Neumann-Cosel, P. ; Pietralla, N. ; Ponomarev, V. Yu. ; Romig, C. ; Scheck, M. ; Schnorrenberger, L. ; Volz, S. ; Zweidinger, M. |
| Title: | Low-lying dipole strength in the N=28 shell-closure nucleus ⁵²Cr |
| Language: | English |
| Abstract: | The low-lying dipole strength of the N=28 closed-shell nucleus ⁵²Cr was studied with nuclear resonance fluorescence up to 9.9 MeV, using bremsstrahlung at the superconducting Darmstadt linear electron accelerator S-DALINAC. Twenty-eight spin-1 states were observed between 5.0 and 9.5 MeV excitation energy, 14 of which for the first time. Both electric dipole excitations (E1, around 8 MeV) and magnetic dipole excitations (M1, around 9 MeV) were detected. Microscopic calculations within the quasiparticle-phonon nuclear model were performed and show good agreement with experimental results. The structure of E1 and M1 excitations, respectively, is discussed. |
| Journal or Publication Title: | Physical Review C |
| Volume of the journal: | 88 |
| Issue Number: | 5 |
| Uncontrolled Keywords: | S-DALINAC, Nuclear Resonance Fluorescence, ⁵²Cr, E1, M1, Quasiparticle-phonon Model, SFB634, A1 |
| Divisions: | 05 Department of Physics 05 Department of Physics > Institute of Nuclear Physics |
| Date Deposited: | 11 Feb 2014 10:03 |
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