Magnetic dipole excitations of Cr 50

Pai H, Beck T, Beller J, Beyer R, Bhike M, Derya V, Gayer U, Isaak J, Krishichayan , Kvasil J, Löher B, Nesterenko VO, Pietralla N, Martínez-Pinedo G, Mertes L, Ponomarev VY, Reinhard PG, Repko A, Ries PC, Romig C, Savran D, Schwengner R, Tornow W, Werner V, Wilhelmy J, Zilges A, Zweidinger M (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Physical Review C - Nuclear Physics American Physical Society

Book Volume: 93

Article Number: 014318

Journal Issue: 1

DOI: 10.1103/PhysRevC.93.014318

Abstract

The low-lying M1 strength of the open-shell nucleus Cr50 has been studied with the method of nuclear resonance fluorescence up to 9.7 MeV using bremsstrahlung at the superconducting Darmstadt linear electron accelerator S-DALINAC and Compton backscattered photons at the High Intensity γ-ray Source (HIγS) facility between 6 and 9.7 MeV of the initial photon energy. Fifteen 1+ states have been observed between 3.6 and 9.7 MeV. Following our analysis the lowest 1+ state at 3.6 MeV can be considered as an isovector orbital mode with some spin admixture. The obtained results generally match the estimations and trends typical for the scissors-like mode. Detailed calculations within the Skyrme quasiparticle random-phase-approximation method and the large-scale shell model justify our conclusions. The calculated distributions of the orbital current for the lowest 1+-state suggest the schematic view of Lipparini and Stringari (isovector rotation-like oscillations inside the rigid surface) rather than the scissors-like picture of Lo Iudice and Palumbo. The spin M1 resonance is shown to be mainly generated by spin-flip transitions between the orbitals of the fp shell.

Authors with CRIS profile

Paul-Gerhard Reinhard Naturwissenschaftliche Fakultät

Involved external institutions

Technische Universität Darmstadt DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE) Duke University US United States (USA) (US) Universität zu Köln DE Germany (DE) GSI Helmholtzzentrum für Schwerionenforschung GmbH DE Germany (DE) Univerzita Karlova v Praze / Charles University in Prague CZ Czech Republic (CZ) Joint Institute for Nuclear Research (JINR) / Объединённый институт ядерных исследований (ОИЯИ) RU Russian Federation (RU)

How to cite

APA:

Pai, H., Beck, T., Beller, J., Beyer, R., Bhike, M., Derya, V.,... Zweidinger, M. (2016). Magnetic dipole excitations of Cr 50. Physical Review C - Nuclear Physics, 93(1). https://doi.org/10.1103/PhysRevC.93.014318

MLA:

Pai, H., et al. "Magnetic dipole excitations of Cr 50." Physical Review C - Nuclear Physics 93.1 (2016).

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