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1. Nuclear moment measurements of Neutron-rich Aluminum Isotopes Using Spin-polarized RI beams: Determination of the Boundary of the “Island of Inversion”.

Author

Kameda, D., Ueno, H., Asahi, K., Takemura, M., Nagae, D., Shimada, K., Yoshimi, A., Kobayashi, Y., Haseyama, T., Uchida, M., Takase, K., Arai, T., Inoue, T., Suda, S., Murata, J., Kawamura, H., Watanabe, H., and Ishihara, M.

Subjects
NUCLEAR moments, QUADRUPOLE moments, ALUMINUM isotopes, NUCLEAR shell theory, NUCLEAR magnetic resonance, POLARIZATION (Nuclear physics)
Abstract

The electric quadrupole moment Q for the ground state of 32Al has been measured using the β-NMR technique. Spin-polarized 32Al nuclei were obtained from the fragmentation of 40Ar projectiles at E/A = 95 MeV/nucleon, and were implanted in a single crystal α-Al2O3 stopper. The quadrupole moment was deduced from the measured quadrupole coupling constant. The obtained value, |Q(32Alg.s.)| = 24(2) mb, was well reproduced by shell model calculations within the sd shell, indicating that 32Al is a normal sd-shell nucleus. The result is in sharp contrast to the strongly deformed nuclei 32Mg and 31Mg neighboring the 32Al isotope. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2007
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