Fine Structure of the Giant M1 Resonance in 90Zr

Rusev, G.; Tsoneva, N.; Dönau, F.; Frauendorf, S.; Schwengner, R.; Tonchev, A. P.; Adekola, A. S.; Hammond, S. L.; Huibregtse, C.; Kelley, J. H.; Kwan, E.; Lenske, H.; Tornow, W.; Wagner, A.

doi:10.1088/1742-6596/312/9/092053

Fine Structure of the Giant M1 Resonance in 90Zr

Rusev, G.; Tsoneva, N.; Dönau, F.; Frauendorf, S.; Schwengner, R.; Tonchev, A. P.; Adekola, A. S.; Hammond, S. L.; Huibregtse, C.; Kelley, J. H.; Kwan, E.; Lenske, H.; Tornow, W.; Wagner, A.

Abstract

The M1 excitations in the nuclide 90Zr have been studied in a photon-scattering experiment with monoenergetic and linearly-polarized beams from 7 to 11 MeV. More than 40 J^pi = 1+ states have been identified from observed ground-state transitions, revealing the fine structure of the giant M1 resonance with centroid energy of 9 MeV and sum strength of 3.4(3) µ_N^2 . The result for the total M1 strength and its fragmentation are discussed in the framework of three-phonon quasi-particle model.

Keywords: Monoenergetic; polarized gamma rays; Photon scattering; M1 and E1 excitations; M1 strength; Magnetic giant resonance; Quasi-particle-phonon model

Beteiligte Forschungsanlagen

Strahlungsquelle ELBE DOI: 10.17815/jlsrf-2-58

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DOI: 10.17815/jlsrf-2-58 is cited by this (Id 16858) publication

Journal of Physics: Conference Series 312(2012), 092053
DOI: 10.1088/1742-6596/312/9/092053

Permalink: https://www.hzdr.de/publications/Publ-16858