Avigo, R, Wieland, O, Bracco, A, Camera, F, Ameil, F, Arici, T, Atac, A, Barrientos, D, Bazzacco, D, Bednarczyk, P et al (show 69 more authors)
(2020)
Low-lying electric dipole γ-continuum for the unstable <SUP>62</SUP><SUP>,</SUP><SUP>64</SUP>Fe nuclei: Strength evolution with neutron number.
PHYSICS LETTERS B, 811.
p. 135951.
ISSN 0370-2693, 1873-2445
Abstract
The γ-ray emission from the nuclei <sup>62,64</sup>Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei <sup>62,64</sup>Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1<sup>−</sup> states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Fe-64, Fe-62, Nuclear structure, Dipole excitation around neutron threshold |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 10 Dec 2020 11:35 |
| Last Modified: | 04 Jun 2025 16:48 |
| DOI: | 10.1016/j.physletb.2020.135951 |
| Open Access URL: | https://doi.org/10.1016/j.physletb.2020.135951 |
| Related Websites: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3109865 |
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