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Low-lying dipole strength in the N=28 shell-closure nucleus ⁵²Cr

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
Journal volume: 88
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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