Nuclear Level Density and $\gamma$-ray Strength Function of $^{63}\mathrm{Ni}$

Vetle W. Ingeberg; Pete Jones; Lumkile Msebi; Sunniva Siem; Mathis Wiedeking; Abraham Aungwa; Maluba V. Chisapi; Elena Lawrie; Kgashane Malatji; Lucky Makhathini; Sive Noncolela; Obed Shirinda

doi:10.1103/physrevc.106.054315

arXiv · 2207.01571

Nuclear Level Density and $\gamma$-ray Strength Function of $^{63}\mathrm{Ni}$

Vetle W. Ingeberg·Pete Jones·Lumkile Msebi·Sunniva Siem·Mathis Wiedeking·Abraham Aungwa·Maluba V. Chisapi·Elena Lawrie·Kgashane Malatji·Lucky Makhathini·Sive Noncolela·Obed Shirinda

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Abstract

The nuclear level density (NLD) and $\gamma$-ray strength function ($\gamma$SF) of $^{63}\mathrm{Ni}$ have been investigated using the Oslo method. The extracted NLD is compared with previous measurements using particle evaporation and those found from neutron resonance spacing. The $\gamma$SF was found to feature a strong low energy enhancement that could be explained as M1 strength based on large scale shell model calculations. Comparison of $\gamma$SFs measured with the Oslo method for various $\mathrm{Ni}$ isotopes reveals systematic changes to the strength below $5$ MeV with increasing mass.

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Vetle W. Ingeberg, Pete Jones, Lumkile Msebi, Sunniva Siem, Mathis Wiedeking, Abraham Aungwa, Maluba V. Chisapi, Elena Lawrie, Kgashane Malatji, Lucky Makhathini, Sive Noncolela, Obed Shirinda. 2022-07-04. Nuclear Level Density and $\gamma$-ray Strength Function of $^{63}\mathrm{Ni}$. https://doi.org/10.1103/physrevc.106.054315

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