High spin states of ⁴⁰K populated through the ²⁷Al(¹⁹F,αnp)⁴⁰K reaction at 68 MeV beam energy were studied using the Indian National Gamma Array (INGA) facility. Six new levels and fourteen new transitions were added to the existing level scheme. The spins and parities of most of the levels were assigned, modified, or confirmed from RDCO, RADO, and linear polarization measurements. The multipole mixing ratios (δ) for most of the transitions were measured. Large-basis shell-model calculations were performed to understand the microscopic origin of the levels. Different particle restrictions in $sd$ and $pf$ shell orbitals were used to explain the experimental results.
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Rahaman et al. (2024) studied this question.
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