Measurement of ejectile polarization in heavy ion reactions via beta-ray asymmetry

https://doi.org/10.1016/0167-5087(84)90300-4Get rights and content

Abstract

A method for measuring spin polarization of ejectiles in heavy ion reactions is presented, which capitalizes the asymmetry in the angular distribution of β-rays from the ejectile. Incorporating the NMR technique the detection of β-ray asymmetry proves to be indeed a sensitive and reliable way to determine polarization when applied to short-lived β-emitting products with high Qβ-values. The method was used to investigate the polarization of the product 12B as a function of Q-value of the reactions induced by heavy ions at energies well above the Coulomb barrier. Sizeable polarization was observed. The results show that this method provides us with useful information in investigating the heavy ion reaction mechanisms. The polarization observed in these reactions implies the possibility of a wide variety of applications.

References (35)

  • J. Wilczynski

    Phys. Lett.

    (1973)
  • D.M. Brink

    Phys. Lett.

    (1972)
  • F. Pougheon et al.

    Nucl. Phys.

    (1979)
  • K. Sugimoto et al.

    Phys. Lett.

    (1977)
  • N. Takahashi et al.

    Phys. Lett.

    (1978)
    N. TakahashiT. Minamisono et al.

    Hyperfine Int.

    (1981)
  • R.L. Williams et al.

    Phys. Rev.

    (1970)
  • M.E. Rose

    Elementary theory of angular momentum

    (1957)
  • L.F. Chase et al.

    Phys. Rev.

    (1968)
  • A.G. Artukh et al.

    Nucl. Phys.

    (1971)
  • M. Ishihara et al.
  • K. Van Bibber et al.

    Phys. Rev. Lett.

    (1977)
  • W. Trautmann et al.

    Phys. Rev. Lett.

    (1977)
    C. Lauterbach et al.

    Phys. Rev. Lett.

    (1978)
  • C.S. Wu et al.

    Phys. Rev.

    (1957)
  • K. Sugimoto et al.

    J. Phys. Soc. Jpn

    (1978)
  • T. Minamisono et al.

    J. Phys. Soc. Jpn

    (1971)
    H. Hamagaki et al.

    J. Phys. Soc. Jpn

    (1979)
  • K. Sugimoto et al.

    J. Phys. Soc. Japan

    (1966)
    T. Minamisono et al.

    Phys. Lett.

    (1976)
  • M. TanakaM. Tanaka et al.

    Nucl. Phys.

    (1976)
  • Cited by (0)

    Present address: Laboratory of Nuclear Studies, Faculty of Science, Osaka University, Toyonaka, Osaka, 560 Japan.

    ∗∗

    Also, College of General Eduction, Osaka University, Toyonaka, Osaka, 560 Japan.

    +

    Present address: Institute for Nuclear Study, The University of Tokyo, Tanashi, Tokyo, 188 Japan.

    View full text