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Tilted-foil technique for producing a spin-polarized radioactive isotope beam

  • Regular Article - Experimental Physics
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Abstract

The tilted-foil method for producing spin-polarized radioactive isotope beams has been studied for the application to nuclear physics and materials science, using the radioactive nucleus 8Li ( \(\ensuremath I^{\pi}=2^+\) , g = 0.82678(9) , \(\ensuremath T_{1/2}=0.838(6)\) s) produced at the Tokai Radioactive Ion Accelerator Complex (TRIAC). We successfully produced polarization in a 8Li beam of \(\ensuremath 7.3\pm0.5\) % using 15 thin polystyrene foils (4.2 \(\ensuremath \mu \mathrm{g/cm}^2\) fabricated especially for this purpose. A systematic study of the nuclear polarization as a function of the number of foils, beam energy, tilt angle and foil material has been performed, confirming the features of the tilted-foil technique experimentally. The contributions made to the nuclear polarization of 8Li nuclei by the atomic states was investigated.

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Authors and Affiliations

  1. Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), 305-0801, Ibaraki, Japan

    Y. Hirayama, Y. X. Watanabe, S. C. Jeong, H. Miyatake, N. Imai, H. Ishiyama, I. Katayama & H. Kawakami

  2. Department of Physics, Osaka University, 560-0043, Osaka, Japan

    M. Mihara & K. Matsuta

  3. Kochi University of Technology, 782-8502, Kochi, Japan

    S. Momota

  4. Japan Atomic Energy Agency (JAEA), 319-1195, Ibaraki, Japan

    T. Hashimoto, S. Ichikawa, T. Ishii, I. Nishinaka, K. Nishio, H. Makii, S. Mitsuoka, A. Osa, Y. Otokawa & T. K. Sato

  5. Radioisotope Center, Niigata University, 951-8510, Niigata, Japan

    T. Izumikawa

  6. Department of Physics, Rikkyo University, 171-8501, Tokyo, Japan

    H. Kawamura

Authors
  1. Y. Hirayama
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  2. M. Mihara
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  3. Y. X. Watanabe
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  4. S. C. Jeong
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  5. H. Miyatake
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  6. S. Momota
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  7. T. Hashimoto
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  8. N. Imai
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  9. K. Matsuta
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  10. H. Ishiyama
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  11. S. Ichikawa
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  12. T. Ishii
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  13. T. Izumikawa
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  14. I. Katayama
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  15. H. Kawakami
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  16. H. Kawamura
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  17. I. Nishinaka
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  18. K. Nishio
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  19. H. Makii
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  20. S. Mitsuoka
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  21. A. Osa
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  22. Y. Otokawa
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  23. T. K. Sato
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Corresponding author

Correspondence to Y. Hirayama.

Additional information

Communicated by B.R. Fulton

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Hirayama, Y., Mihara, M., Watanabe, Y.X. et al. Tilted-foil technique for producing a spin-polarized radioactive isotope beam. Eur. Phys. J. A 48, 54 (2012). https://doi.org/10.1140/epja/i2012-12054-1

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  • DOI: https://doi.org/10.1140/epja/i2012-12054-1

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