Measurement of the electric quadrupole moment of 32Al

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

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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, is remarkably small as compared with other Al isotopes, but is well explained by shell model calculations within the sd shell. The present result indicates that 32Al has a normal sd-shell structure, in contrast to the neighboring N = 19 isotone 31Mg for which a strongly deformed intruder ground state has been reported to occur.

Original languageEnglish
Pages (from-to)93-97
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume647
Issue number2-3
DOIs
Publication statusPublished - Apr 5 2007
Externally publishedYes

Keywords

  • Electric quadrupole moment of Al
  • Island of inversion
  • Nuclear deformation
  • Projectile fragmentation
  • β-NMR

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Kameda, D., Ueno, H., Asahi, K., Takemura, M., Yoshimi, A., Haseyama, T., Uchida, M., Shimada, K., Nagae, D., Kijima, G., Arai, T., Takase, K., Suda, S., Inoue, T., Murata, J., Kawamura, H., Kobayashi, Y., Watanabe, H., & Ishihara, M. (2007). Measurement of the electric quadrupole moment of 32Al. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 647(2-3), 93-97. https://doi.org/10.1016/j.physletb.2007.01.063