Wilhelmy, J. ; Brown, A. ; Erbacher, P. ; Gayer, U. ; Isaak, J. ; Krishichayan, ; Löher, B. ; Müscher, M. ; Pai, H. ; Pietralla, N. ; Ries, P. ; Savran, D. ; Scholz, P. ; Spieker, M. ; Tornow, W. ; Werner, V. ; Zilges, A. (2018)
Investigation of J=1 states and their γ-decay behavior in Cr-52.
In: Physical Review C, 98 (3)
doi: 10.1103/PhysRevC.98.034315
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Background: In the A≈50 mass region M1 spin-flip transitions are prominent around 9 MeV. An accumulation of 1− states between 5 and 8 MeV generating additional E1 strength, also denoted as pygmy dipole resonance, has been established in many nuclei with neutron excess within the last decade.
Purpose: The γ-decay behavior of J=1 states has been investigated in an NRF experiment. M1 excitations have been compared to shell model calculations.
Methods: J=1 states were excited by quasi-monoenergetic, linearly polarized γ-ray beams generated by laser-Compton backscattering at the HIγS facility, Durham, NC, USA. Depopulating γ rays were detected with the multidetector array γ3.
Results: For eleven beam-energy settings the γ-decay behavior of dipole states was analyzed by a state-to-state analysis and average γ-decay branching ratios have been investigated. 34 parity quantum numbers were assigned to J=1 states.
Conclusions: Six 1− states and two 1+ states have been investigated in NRF experiments for the first time. The M1 strength distribution is in good agreement with shell-model calculations.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Wilhelmy, J. ; Brown, A. ; Erbacher, P. ; Gayer, U. ; Isaak, J. ; Krishichayan, ; Löher, B. ; Müscher, M. ; Pai, H. ; Pietralla, N. ; Ries, P. ; Savran, D. ; Scholz, P. ; Spieker, M. ; Tornow, W. ; Werner, V. ; Zilges, A. |
| Art des Eintrags: | Bibliographie |
| Titel: | Investigation of J=1 states and their γ-decay behavior in Cr-52 |
| Sprache: | Englisch |
| Publikationsjahr: | 19 September 2018 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review C |
| Jahrgang/Volume einer Zeitschrift: | 98 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1103/PhysRevC.98.034315 |
| Kurzbeschreibung (Abstract): | Background: In the A≈50 mass region M1 spin-flip transitions are prominent around 9 MeV. An accumulation of 1− states between 5 and 8 MeV generating additional E1 strength, also denoted as pygmy dipole resonance, has been established in many nuclei with neutron excess within the last decade. Purpose: The γ-decay behavior of J=1 states has been investigated in an NRF experiment. M1 excitations have been compared to shell model calculations. Methods: J=1 states were excited by quasi-monoenergetic, linearly polarized γ-ray beams generated by laser-Compton backscattering at the HIγS facility, Durham, NC, USA. Depopulating γ rays were detected with the multidetector array γ3. Results: For eleven beam-energy settings the γ-decay behavior of dipole states was analyzed by a state-to-state analysis and average γ-decay branching ratios have been investigated. 34 parity quantum numbers were assigned to J=1 states. Conclusions: Six 1− states and two 1+ states have been investigated in NRF experiments for the first time. The M1 strength distribution is in good agreement with shell-model calculations. |
| Freie Schlagworte: | Deutsche Forschungsgemeinschaft, DFG, German Research Foundation, SFB 1245, Project-ID 279384907, BMBF, ID 05P2015PKEN9, ID 05P15RDEN9 |
| Zusätzliche Informationen: | Art.No.: 034315 |
| 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 11:18 |
| Letzte Änderung: | 13 Feb 2024 08:21 |
| PPN: | 515522309 |
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