Quadrupole moments of neutron-deficient 20,21Na

K. Minamisono, K. Matsuta, T. Minamisono, C. D.P. Levy, T. Nagatomo, M. Ogura, T. Sumikama, J. A. Behr, K. P. Jackson, M. Mihara, M. Fukuda

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9 Citations (Scopus)


The electric-quadrupole coupling constant of the ground states of the proton drip line nucleus 20Na (Iπ = 2+, T1 / 2 = 447.9   ms) and the neutron-deficient nucleus 21Na (Iπ = 3 / 2+, T1 / 2 = 22.49   s) in a hexagonal ZnO single crystal were precisely measured to be | e q Q / h | = 690 ± 12   kHz and 939 ± 14   kHz, respectively, using the multi-frequency β-ray detecting nuclear magnetic resonance technique under presence of an electric-quadrupole interaction. An electric-quadrupole coupling constant of 27Na in the ZnO crystal was also measured to be | e q Q / h | = 48.4 ± 3.8   kHz. The electric-quadrupole moments were extracted as | Q (20Na) | = 10.3 ± 0.8   e fm2 and | Q (21Na) | = 14.0 ± 1.1   e fm2, using the electric-coupling constant of 27Na and the known quadrupole moment of this nucleus as references. The present results are well explained by shell-model calculations in the full sd-shell model space.

Original languageEnglish
Pages (from-to)120-125
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2
Publication statusPublished - 2009 Feb 16


  • β-ray detecting nuclear magnetic resonance
  • β-ray detecting quadrupole resonance
  • Na
  • Na
  • Electric-coupling constant
  • Quadrupole moment
  • Shell model

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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