Nuclear moments of neutron-rich aluminum isotopes
RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
2 Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8551, Japan
3 Department of Physics, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshima-ku, Tokyo, 171-8501, Japan
Published online: 8 December 2007
Ground-state magnetic-dipole moments (μ) of 30-32Al and electric quadrupole moments (Q) of 31,32Al have been measured with the β-NMR method using spin-polarized radioactive-isotope beams produced in projectile-fragmentation reactions. Beams of 30-32Al were obtained by using RIKEN projectile-fragment separator RIPS after the fragmentation of 40Ar projectiles at an energy of E = 95A MeV on a 93Nb target. The obtained μexp[30-32Al] and values agree well with shell-model calculations within the sd shell using the USD interaction. Also, Qexp[31Al] was found to be small. Thus, we can conclude that these aluminum isotopes are located outside the island of inversion.
PACS: 21.10.Ky – Static electromagnetic moments / 24.70.+s – Polarization in reactions and scattering
© EDP Sciences, Springer-Verlag, 2007