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Electromagnetic moments of short lived β emitters 21F, 23Mg, 27Si and 39Ca

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Abstract

The β-NMR spectra of 21F, 23Mg, 27Si and 39Ca which were produced in heavy ion collisions and implanted in various crystals have been observed. The magnetic moments of 21F and 27Si were determined to be |μ(21F)| = 3.9194 ± 0.0012 μN and |μ(27Si)| = 0.8653 ± 0.0003 μN, respectively. The electric quadrupole coupling constants were determined for the first time to be |eqQ(21F in MgF2)/h|= 9.94 ± 0.09 MHz, |eqQ(23Mg in MgF2)/h|= 1.96 ± 0.06 MHz, |eqQ(27Si in Al2O3)/h|= 1.90 ± 0.12 MHz, |eqQ(39Ca in CaCO3)/h|= 0.60 ± 0.04 MHz. From the present eqQ/h, the Q moments were deduced as |Q(21F)|= 110 ± 22 mb, |Q(23Mg)|= 114 ± 3 mb, |Q(27Si)|= 60 ± 13 mb and |Q(39Ca)|= 36± 7 mb. The present data were compared with the theoretical values obtained by the OXBASH shell model code.

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Authors and Affiliations

  1. Department of Physics, Osaka University, Toyonaka, 560, Japan

    K. Matsuta, T. Onishi, M. Fukuda, T. Minamisono, H. Akai, M. Sasaki, T. Yamaguchi, T. Miyake, K. Sato, K. Minamisono, F. Ohsumi, Y. Muramoto, S. Oui, C. Ha, K. Tanaka, K. Kidera & A. Morishita

  2. NIRS, HIMAC, Inage, Chiba, 263, Japan

    A. Kitagawa

  3. Faculty of Science, Niigata University, Niigata, 950-21, Japan

    M. Torikoshi, M. Kanazawa, T. Nishio, S. Koda & T. Ohtsubo

  4. The Energy Center Wakasa Bay, Fukui, 914, Japan

    S. Fukuda

  5. Kochi University of Technology, Kochi, 782, Japan

    Y. Nojiri & S. Momota

  6. RIKEN, Wako, Saitama, 351-01, Japan

    A. Ozawa, K. Yoshida, T. Suzuki, T. Kobayashi & I. Tanihata

  7. Stanford University, CA, 94305, USA

    S.S. Hanna

  8. Lawrence Berkeley Laboratory, CA, 94720, USA

    J.R. Alonso, G.F. Krebs & T.J.M. Symons

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  1. K. Matsuta
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  2. T. Onishi
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  3. M. Fukuda
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  4. T. Minamisono
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  5. H. Akai
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  6. M. Sasaki
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  7. T. Yamaguchi
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  8. T. Miyake
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  9. K. Sato
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  11. F. Ohsumi
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  12. Y. Muramoto
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  13. S. Oui
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  14. C. Ha
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  15. K. Tanaka
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  16. K. Kidera
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  17. A. Morishita
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  18. A. Kitagawa
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  19. M. Torikoshi
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  20. M. Kanazawa
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  21. T. Nishio
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  22. S. Koda
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  23. T. Ohtsubo
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  24. S. Fukuda
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  25. Y. Nojiri
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  26. S. Momota
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  27. A. Ozawa
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  28. K. Yoshida
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  29. T. Suzuki
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  30. T. Kobayashi
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  31. I. Tanihata
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  32. S.S. Hanna
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  33. J.R. Alonso
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  34. G.F. Krebs
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  35. T.J.M. Symons
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Matsuta, K., Onishi, T., Fukuda, M. et al. Electromagnetic moments of short lived β emitters 21F, 23Mg, 27Si and 39Ca. Hyperfine Interactions 120, 673–677 (1999). https://doi.org/10.1023/A:1017036009679

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