31Al

[paper] Ground-state electric quadrupole moment of 31Al

Ground-state electric quadrupole moment of 31Al

D. Nagae et al.

The ground-state electric quadrupole moment of 31Al(Iπ=5/2+,T1/2=644(25) ms) has been measured by means of β-ray-detected nuclear magnetic resonance spectroscopy using a spin-polarized 31Al beam produced in the projectile fragmentation reaction. The obtained Q moment, |Qexp(31Al)|=112(32) e mb, is in agreement with conventional shell model calculations within the sd valence space. Previous results on the magnetic moment also support the validity of the sd model in this isotope, and thus it is concluded that 31Al is located outside of the island of inversion