30Al

Magnetic moments of ³⁰₁₃Al₁₇ and ³²₁₃Al₁₉

H. Ueno et al.

doi: 10.1016/j.physletb.2005.04.037

Ground-state magnetic moments of ³⁰Al and ³²Al were measured
with the β-NMR method using radioactive-isotope beams spin-polarized in the projectile-fragmentation
reaction. Polarization of sizes |P|=0.5–1% were obtained in spite of the large numbers of nucleons
that are removed from the projectile ⁴⁰Ar, providing a promising prospect that
substantial polarizations are obtained even in fragment nuclei that are far removed from the projectile nucleus.
The obtained μ moments, |μ_exp(³⁰Al)|=3.010(7) μ_N
and |μ_exp(³²Al)|=1.959(9) μ_N, are in agreement with
shell model calculations within the sd valence space, although a reduction in the energy-gap between
the sd and pf states is predicted for ³²Al in recent theoretical studies.