2023
DOI: 10.21203/rs.3.rs-3169781/v1
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First evidence for non 1− pygmy dipole resonance in neutron-rich nuclei

R. Li,
V. Yu. Ponomarev,
M. N. Harakeh
et al.

Abstract: We predict the existence of medium spin PDR and find experimental evidence in 80Ge using β-decay of 80Ga. This nucleus was produced in the photo-fission of 238U. A hybrid γ-ray spectrometer was developed using a plastic detector for β-tagging, HPGe detectors for low-energy γ rays detection and phoswich detectors of PARIS for high-energy γ rays. The low-high energy coincidence spectrum shows two peaks at 7181(53) and 7337(53) keV in the β-decay of the 80mGa isomeric state only, in coincidence with the 21+ → 0+ … Show more

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