Magnetic moment and electric quadrupole moment of the 18N ground state

H. Ogawa, K. Asahi, K. Sakai, A. Yoshimi, M. Tsuda, Y. Uchiyama, T. Suzuki, K. Suzuki, N. Kurokawa, M. Adachi, H. Izumi, H. Ueno, T. Shimoda, S. Tanimoto, N. Takahashi, W. D. Schmidt-Ott, M. Schäfer, S. Fukuda, A. Yoshida, M. NotaniT. Kubo, H. Okuno, H. Sato, N. Aoi, K. Yoneda, H. Iwasaki, N. Fukuda, N. Fukunishi, M. Ishihara, H. Miyatake

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35 Citations (Scopus)


The magnetic moment and electric quadrupole moment of a neutron-rich nucleus 18N have been determined by the β-NMR method, taking advantage of the fragment spin polarization induced in the intermediate-energy projectile fragmentation reaction. To assure the existence of a sufficient polarization prior to the resonance search, a scheme of polarization measurement by means of an adiabatic field rotation has been developed and successfully incorporated in the β-NMR experiment. From the observed resonance in a R stopper the magnetic moment for the 18N ground state has been determined to be | μ| = 0.3279 ± 0.0013μN. The 18N fragments have also been implanted in a single crystal Mg stopper, and from the observed quadrupole frequency |eqQ/h| = 73.2 ± 1.4 kHz, the electric quadrupole moment |Q| = 12.3 ± 1.2 mb has been deduced. The obtained μ and Q are compared with shell model calculations.

Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 1999
Externally publishedYes


  • Effective charge
  • Electric quadrupole moment
  • Magnetic moment
  • N ground state
  • Neutron-rich nucle
  • Projectile fragmentation
  • Shell model
  • Spin polarization
  • β-NMR

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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