Nuclear spin alignment of 12,13B produced in heavy ion collisions

T. Nagatomo, K. Matsuta, K. Hashimoto, M. Ota, K. Arimura, K. Minamisono, T. Sumikama, M. Ogura, T. Iwakoshi, T. Miyake, S. Kudo, K. Akutsu, T. Minamisono, M. Fukuda, M. Mihara, S. Momota, Y. Nojiri, A. Kitagawa, M. Torikoshi, M. KanazawaM. Suda, M. Hirai, T. J.M. Symons, G. F. Krebs, J. R. Alonso, S. Y. Zhu, J. Z. Zhu, Y. J. Xu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The nuclear spin alignments of the β-emitting fragments 12B(Iπ = 1+, T1/2 = 20.2 ms) and 13B(Iπ = 3/2-, T1/2 = 17.4 ms) produced in the 100A-MeV 13C, 15N + 9Be collisions respectively have been observed for the first time detecting asymmetric β-ray emission from these nuclei. By means of the spin manipulation technique based on the hyperfine interaction of B isotopes in TiO2, both the polarization P and the alignment A were determined reliably. The obtained P and A were significantly smaller than the expectation from the kinematical model. From the fact that the quenching factors for P and A are almost the same, there may be some depolarization mechanism in the collision process itself.

Original languageEnglish
Pages (from-to)233-237
Number of pages5
JournalHyperfine Interactions
Volume136-137
Issue number3-8
DOIs
Publication statusPublished - 2001

Keywords

  • Nuclear spin orientation
  • Polarized nuclear beam
  • Projectile fragmentation
  • Reaction mechanism
  • β-NMR

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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