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Evolution of the $\gamma$-ray strength function in neodymium isotopes

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arxiv 2204.08852 v2 pith:IHI6DXGV submitted 2022-04-19 nucl-ex nucl-th

classification nucl-exnucl-th
keywords datadeformationenhancementgamma-raygamma-sfslow-energymodenuclear
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The experimental gamma-ray strength functions (gamma-SFs) of 142,144-151Nd have been studied for gamma-ray energies up to the neutron separation energy. The results represent a unique set of gamma-SFs for an isotopic chain with increasing nuclear deformation. The data reveal how the low-energy enhancement, the scissors mode and the pygmy dipole resonance evolve with nuclear deformation and mass number. The data indicate that the mechanisms behind the low-energy enhancement and the scissors mode are decoupled from each other.

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