Elsevier

Nuclear Physics A

Volume 97, Issue 1, 17 April 1967, Pages 187-192
Nuclear Physics A

On the spin assignment of neutron resonances in 149Sm using (n, α) reaction

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Abstract

Measurements of thermal-neutron cross sections for the 149Sm(n, α)146Nd reaction have been done using a 99% enriched 149Sm target. Results are compared with theoretical values of cross sections calculated on the basis of the compound nucleus and statistical model. Experimental and calculated values are consistent only when assuming that the spins of the bound state and the 0.0967 eV resonance in 149Sm+n are 3 and 4, respectively. For such a spin sequence the 2200 m/sec experimental neutron cross sections are: 46.0±5 mb for 149Sm(n, α) 146Nd2+ and 8.5±1.5 mb for 149Sm(n, α)146Nd0+.

References (14)

  • E. Cheifetz

    Phys. Lett.

    (1962)
  • F. Poortmans

    Nuclear Physics

    (1966)
  • R.D. Macfarlane et al.

    Phys. Rev.

    (1962)
  • W.N. Andreev et al.

    Yadern. Fiz.

    (1965)
  • K. Beg et al.

    Bull. Am. Phys. Soc.

    (1965)
  • H. Marshak

    Phys. Rev.

    (1962)
  • H. Ceulemans

    J. Phys.

    (1963)
There are more references available in the full text version of this article.

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