Evolution of the $\gamma$-ray strength function in neodymium isotopes
M. Guttormsen, K. O. Ay, M. Ozgur, E. Algin, A. C. Larsen, F. L. Bello, Garrote, H. C. Berg, L. Crespo Campo, T. Dahl-Jacobsen, F. W. Furmyr, D., Gjestvang, A. G\"orgen, T. W. Hagen, V. W. Ingeberg, B. V. Kheswa, I. K. B., Kullmann, M. Klintefjord, M. Markova, J. E. Midtb{\o}
TL;DR
This study investigates how gamma-ray strength functions evolve across neodymium isotopes, revealing the behavior of low-energy enhancement, scissors mode, and pygmy dipole resonance with increasing nuclear deformation.
Contribution
It provides the first comprehensive experimental gamma-ray strength functions for a chain of neodymium isotopes, highlighting their deformation-dependent evolution.
Findings
Low-energy enhancement varies with deformation.
Scissors mode and pygmy resonance are decoupled mechanisms.
Data covers isotopes from 142Nd to 151Nd.
Abstract
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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