Gayer, U. ; Beck, T. ; Bhike, M. ; Isaak, J. ; Pietralla, N. ; Ries, P. C. ; Savran, D. ; Schilling, M. ; Tornow, W. ; Werner, V. (2019)
Experimental M1 response of Ar-40 as a benchmark for neutrino-nucleus scattering calculations.
In: Physical Review C, 100 (3)
doi: 10.1103/PhysRevC.100.034305
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The excitation of atomic nuclei via magnetic dipole transitions is closely related to the inelastic neutral-current neutrino-nucleus (NC-νA) scattering process due to the similarity of the transition operators. NC-νA-scattering serves for the detection of supernova neutrinos and poses a significant source of background in modern liquid-argon based high-energy neutrino detection experiments. To enable tests of the reliability of predictions for neutrino-nucleus scattering, the magnetic dipole response of 40Ar below 7.7 MeV was characterized in a nuclear resonance fluorescence experiment using quasimonoenergetic γ-ray beams. The linear polarization of the beams allowed for assignments of electric or magnetic character to previously known dipole excitations. A total magnetic dipole strength of 0.36+0.04−0.05μ2N was identified in the energy range of the present experiment. Combined with data from previous measurements, the full magnetic dipole strength of 40Ar below the neutron separation threshold was investigated. Due to the low background in the energy range within the bandwidth of the γ-ray beams, the previous sensitivity limit was improved. A large-scale nuclear shell model calculation in the sd−fp space satisfactorily agrees with the data in terms of excitation energies and strengths of the observed 1+ states.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Gayer, U. ; Beck, T. ; Bhike, M. ; Isaak, J. ; Pietralla, N. ; Ries, P. C. ; Savran, D. ; Schilling, M. ; Tornow, W. ; Werner, V. |
| Art des Eintrags: | Bibliographie |
| Titel: | Experimental M1 response of Ar-40 as a benchmark for neutrino-nucleus scattering calculations |
| Sprache: | Englisch |
| Publikationsjahr: | 9 September 2019 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review C |
| Jahrgang/Volume einer Zeitschrift: | 100 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1103/PhysRevC.100.034305 |
| Kurzbeschreibung (Abstract): | The excitation of atomic nuclei via magnetic dipole transitions is closely related to the inelastic neutral-current neutrino-nucleus (NC-νA) scattering process due to the similarity of the transition operators. NC-νA-scattering serves for the detection of supernova neutrinos and poses a significant source of background in modern liquid-argon based high-energy neutrino detection experiments. To enable tests of the reliability of predictions for neutrino-nucleus scattering, the magnetic dipole response of 40Ar below 7.7 MeV was characterized in a nuclear resonance fluorescence experiment using quasimonoenergetic γ-ray beams. The linear polarization of the beams allowed for assignments of electric or magnetic character to previously known dipole excitations. A total magnetic dipole strength of 0.36+0.04−0.05μ2N was identified in the energy range of the present experiment. Combined with data from previous measurements, the full magnetic dipole strength of 40Ar below the neutron separation threshold was investigated. Due to the low background in the energy range within the bandwidth of the γ-ray beams, the previous sensitivity limit was improved. A large-scale nuclear shell model calculation in the sd−fp space satisfactorily agrees with the data in terms of excitation energies and strengths of the observed 1+ states. |
| Freie Schlagworte: | Deutsche Forschungsgemeinschaft, DFG, German Research Foundation, SFB 1245, Project-ID 279384907, SFB 634 |
| Zusätzliche Informationen: | Art.No.: 034305 |
| 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 DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 634: Kernstruktur, nukleare Astrophysik und fundamentale Experimente bei kleinen Impulsüberträgen am supraleitenden Darmstädter Elektronenbeschleuniger S-DALINAC |
| Hinterlegungsdatum: | 20 Dez 2023 11:01 |
| Letzte Änderung: | 05 Feb 2024 14:51 |
| PPN: | 515270458 |
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