Theoretical predictions of the decay rate change of the 40K nucleus

چکیده مقاله

This study employs first-principles density functional theory (DFT) calculations to investigate the influence of chemical environment and pressure on the electron capture (EC) decay rate of the nucleus in different chemical environments: metallic potassium (K), potassium chloride (KCl), and muscovite mica ( ). Our results indicate a 0.17 % reduction in the EC decay rate, corresponding to a 0.17 % increase in the half-life within the muscovite structure compared to metallic potassium. Additionally, pressure effects on the half-life are investigated for metallic potassium and muscovite structures. Results show a 0.011 % increase in EC decay rate at 25 GPa relative to zero pressure in metallic potassium.