Nuclear spin orientation of 12,13B created in heavy ion collisions

T. Nagatomo, K. Matsuta, K. Akutsu, T. Iwakoshi, Y. Nakashima, T. Sumikama, M. Ogura, M. Mihara, H. Fujiwara, S. Kumashiro, K. Minamisono, T. Minamisono, M. Fukuda, M. Miyake, S. Momota, Y. Nojiri, A. Kitagawa, M. Sasaki, M. Torikoshi, M. KanazawaM. Suda, S. Sato, M. Hirai, T. J.M. Symons, G. F. Krebs, J. R. Alonso, S. Y. Zhu, J. Z. Zhu, Y. J. Xu, Y. N. Zheng

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1 Citation (Scopus)

Abstract

The momentum dependences of the nuclear spin polarization P and alignment A of 12B (Iπ = 1+ T1/2 = 20.20 ms) [13B (Iπ = 3/2-, T1/2 = 17.36 ms)] produced in 100A MeV 13C [15N] + Be collisions have been measured by detecting the β-ray asymmetry. Because both the P and A were significantly smaller than the prediction from a simple kinematical model, some depolarization mechanisms must be taken into account related with the collision process itself. Comparing the signs of the observed alignment of 12B and 13B, the sign of the quadrupole moment Q(13B) was determined to be positive.

Original languageEnglish
Pages (from-to)505-508
Number of pages4
JournalNuclear Physics A
Volume746
Issue number1-4 SPEC.ISS.
DOIs
Publication statusPublished - 2004 Dec 27

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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