Podolyak, Zs, Harkness-Brennan, LJ and Judson, DS
(2016)
Role of the Delta Resonance in the Population of a Four-Nucleon State in the 56Fe to 54Fe Reaction at Relativistic Energies.
Physical Review Letters, 117 (22).
222302-.
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Abstract
The 54Fe nucleus was populated from a 56Fe beam impinging on a Be target with an energy of E/A=500MeV. The internal decay via γ-ray emission of the 10+ metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the 56Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of 54Fe, suggesting that it was populated via the decay of the Δ0 resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10+ metastable state in 54Fe is a consequence of the quark structure of the nucleons.
Item Type: | Article |
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Uncontrolled Keywords: | isomer decays, nuclear reactions |
Depositing User: | Symplectic Admin |
Date Deposited: | 29 Nov 2016 14:53 |
Last Modified: | 19 Jan 2023 07:24 |
DOI: | 10.1103/PhysRevLett.117.222302 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3004696 |