A nucleus having an even number of neutrons and protons is called an even-even (EE) nucleus in atomic physics. Approximately 60% of all stable nuclei are bosons, which mean they have an integer spin. Using covariant density functional theory, the ground-state properties of even-even nuclei from Z=10 to Z=20 are extensively investigated. The influence of triaxiality on nuclear binding energy, including the mean-field part and the rotational correlation energy, is investigated. There is a significant amount of triaxial distortion in 38Si, 46S, and 48S. There is a small but significant effect of the triaxial deformation degree of freedom on the a-field part of the nuclear binding energy in the current nuclei. To make matters even more interesting, we demonstrate that phenomenological collective correction helps to better reflect the evolution trend of the N=20 shell gap by decreasing the root mean square of binding energies for 41 nuclei from Ne to Ar by 2.22MeV to 1.60MeV.
Nuclei, CDFT, Even
