Ries, P. C. ; Pai, H. ; Beck, T. ; Beller, J. ; Bhike, M. ; Derya, V. ; Gayer, U. ; Isaak, J. ; Löher, B. ; Krishichayan, ; Mertes, L. ; Pietralla, N. ; Romig, C. ; Savran, D. ; Schilling, M. ; Tornow, W. ; Typel, S. ; Werner, V. ; Wilhelmy, J. ; Zilges, A. ; Zweidinger, M. (2019)
Valence-shell dependence of the pygmy dipole resonance: E1 strength difference in Cr-50,54.
In: Physical Review C, 100 (2)
doi: 10.1103/PhysRevC.100.021301
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Background: The low-lying electric dipole strength provides insights into the parameters of the nuclear equation of state via its connection with the pygmy dipole resonance and nuclear neutron skin thickness.
Purpose: The aim was to complement the systematic of the pygmy dipole resonance and first study its behavior across the N=28 neutron shell closure.
Methods: Photon-scattering cross sections of states of 50,54Cr were measured up to an excitation energy of 9.7 MeV via the nuclear resonance fluorescence method using γ-ray beams from bremsstrahlung and Compton backscattering.
Results: Transitions strengths, spin and parity quantum number, and average branching ratios for 55 excited states, 44 of which were observed for the first time, were determined. The comparison between the total observed strengths of the isotopes 50,52,54Cr shows a significant increase above the shell closure.
Conclusions: The evolution of the pygmy dipole resonance is heavily influenced by the shell structure.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Ries, P. C. ; Pai, H. ; Beck, T. ; Beller, J. ; Bhike, M. ; Derya, V. ; Gayer, U. ; Isaak, J. ; Löher, B. ; Krishichayan, ; Mertes, L. ; Pietralla, N. ; Romig, C. ; Savran, D. ; Schilling, M. ; Tornow, W. ; Typel, S. ; Werner, V. ; Wilhelmy, J. ; Zilges, A. ; Zweidinger, M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Valence-shell dependence of the pygmy dipole resonance: E1 strength difference in Cr-50,54 |
| Sprache: | Englisch |
| Publikationsjahr: | 5 August 2019 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review C |
| Jahrgang/Volume einer Zeitschrift: | 100 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1103/PhysRevC.100.021301 |
| Kurzbeschreibung (Abstract): | Background: The low-lying electric dipole strength provides insights into the parameters of the nuclear equation of state via its connection with the pygmy dipole resonance and nuclear neutron skin thickness. Purpose: The aim was to complement the systematic of the pygmy dipole resonance and first study its behavior across the N=28 neutron shell closure. Methods: Photon-scattering cross sections of states of 50,54Cr were measured up to an excitation energy of 9.7 MeV via the nuclear resonance fluorescence method using γ-ray beams from bremsstrahlung and Compton backscattering. Results: Transitions strengths, spin and parity quantum number, and average branching ratios for 55 excited states, 44 of which were observed for the first time, were determined. The comparison between the total observed strengths of the isotopes 50,52,54Cr shows a significant increase above the shell closure. Conclusions: The evolution of the pygmy dipole resonance is heavily influenced by the shell structure. |
| Freie Schlagworte: | Deutsche Forschungsgemeinschaft, DFG, German Research Foundation, SFB 1245, Project-ID 279384907, BMBF, Grants No. 05P18RDEN9, No. 05P18PKEN |
| Zusätzliche Informationen: | Art.No.: 021301(R) |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1245: Atomkerne von fundamentalen Wechselwirkungen zu Struktur und Sternen 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik > Experimentelle Kernstruktur und S-DALINAC |
| Hinterlegungsdatum: | 20 Dez 2023 11:03 |
| Letzte Änderung: | 06 Feb 2024 07:21 |
| PPN: | 515287210 |
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