Abstract
The E2/M1 multipole mixing ratio δ1→2 of the 1+ sc → 2+ 1 γ-ray transition of 156Gd and 164Dy has been measured using the linearly polarized photon beams of the HIγS facility. The employed method of photonscattering experiments in combination with polarized, quasi-monochromatic beams and a dedicated detector setup is highly sensitive to the electric quadrupole-decay properties of the scissors mode.
Highlights
The study of the properties of the nuclear scissors mode [1,2,3] provides an essential insight into the nature of the restoring forces between the proton and neutron subsystems
First information on the E2 decay transition strength of the scissors mode was extracted [6] from a highstatistics photon-scattering experiment on 156Gd using quasi-monochromatic photon beams provided by the High Intensity γ-ray Source (HIγS) [9] at Duke University, Durham, NC, USA
The obtained results indicate that highestprecision photon-scattering experiments [4, 10] with linearly polarized photons [11] are highly sensitive to the electric quadrupole-decay properties of the scissors mode
Summary
The study of the properties of the nuclear scissors mode [1,2,3] provides an essential insight into the nature of the restoring forces between the proton and neutron subsystems. First information on the E2 decay transition strength of the scissors mode was extracted [6] from a highstatistics photon-scattering experiment on 156Gd using quasi-monochromatic photon beams provided by the High Intensity γ-ray Source (HIγS) [9] at Duke University, Durham, NC, USA. The obtained results indicate that highestprecision photon-scattering experiments [4, 10] with linearly polarized photons [11] are highly sensitive to the electric quadrupole-decay properties of the scissors mode. It is the purpose of this manuscript to present first results obtained from a subsequent experiment on the welldeformed nucleus 164Dy at HIγS
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