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

Y. Hirayama, M. Mihara, Y. X. Watanabe, S. C. Jeong, H. Miyatake, S. Momota, T. Hashimoto, N. Imai, K. Matsuta, H. Ishiyama, S. Ichikawa, T. Ishii, T. Izumikawa, I. Katayama, H. Kawakami, H. Kawamura, I. Nishinaka, K. Nishio, H. Makii, S. MitsuokaA. Osa, Y. Otokawa, T. K. Sato

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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 (Iπ = 2+, g = 0.82678(9), T1/2 = 0.838(6)s) produced at the Tokai Radioactive Ion Accelerator Complex (TRIAC). We successfully produced polarization in a 8Li beam of 7.3 ± 0.5% using 15 thin polystyrene foils (4.2 μg/cm2) 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.

Original languageEnglish
Article number54
Pages (from-to)1-10
Number of pages10
JournalEuropean Physical Journal A
Volume48
Issue number5
DOIs
Publication statusPublished - 2012

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Hirayama, Y., Mihara, M., Watanabe, Y. X., Jeong, S. C., Miyatake, H., Momota, S., Hashimoto, T., Imai, N., Matsuta, K., Ishiyama, H., Ichikawa, S., Ishii, T., Izumikawa, T., Katayama, I., Kawakami, H., Kawamura, H., Nishinaka, I., Nishio, K., Makii, H., ... Sato, T. K. (2012). Tilted-foil technique for producing a spin-polarized radioactive isotope beam. European Physical Journal A, 48(5), 1-10. [54]. https://doi.org/10.1140/epja/i2012-12054-1