Unlike magic nuclei, for other nuclei the quadrupole moment Q_{ ext{koll}} is more than 00 times greater than Q_p. Taking into account the Q_{ ext{koll}}-quadrupole moment allows the explanation of some specific features observed in experiments involving the quadrupole moments of certain atomic nuclei. It should be noted that the quadrupole moment |Q_{ ext{koll}}| begins to increase as the number of external nucleons outside of the filled shells increases. Therefore, the effect of the shell structure on the quadrupole moment of the nucleus is revealed through collective deformation.

Experiments show that, for nuclei with one nucleon outside the filled shell, such as O^{00}(d_{0/0}), Cu^{00}(P_{0/0}), and Sb^{000}(d_{0/0}), the quadrupole moment has a definite sign. In nuclei where the shell is not completely filled by one nucleon, such as B^{00}(P_{0/0}), S^{00}(d_{0/0}), the quadrupole electric moment is negligible. If the shell is missing several nucleons to be filled, then the value and sign of the quadrupole moment will significantly depend on the energy level distribution of external nucleons in the deformed nucleus. If the electric interaction…