Eur. Phys. J. Special Topics 150, 185-186 (2007)
https://doi.org/10.1140/epjst/e2007-00299-y

Nuclear moments of neutron-rich aluminum isotopes

¹ 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

Received: 31 January 2007
Published online: 8 December 2007

Abstract

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 μ_exp[^30-32Al] and values agree well with shell-model calculations within the sd shell using the USD interaction. Also, Q_exp[³¹Al] was found to be small. Thus, we can conclude that these aluminum isotopes are located outside the island of inversion.