Alpha Particles from Be9 and C12 by 25-Mev Alpha-Particle Bombardment

Lynn B. Brown and H. B. Knowles
Phys. Rev. 125, 1339 – Published 15 February 1962
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Abstract

Alpha-particle spectra from thin beryllium and carbon targets have been taken at 47.5° laboratory angle and an alpha energy of 25.41 Mev. The center-of-mass spectra of both nuclei indicate that the four-body reactions Be9(α; 3α, n) and C12(α; 4α) are greatly preferred over the three-body reactions Be9(α; α, n)Be8 and C12(α; 2α)Be8. Several inelastic levels of both nuclei appear, and the recoil-decay alpha particles from the 9.61-Mev level of C12* are seen. The Fermi statistical model is invoked in an attempt to establish that the multibody reactions are reasonably representative of the proportions of the two- and three-cluster configurations in the ground states of the two nuclei, and that the three-cluster configurations are preferred.

  • Received 12 October 1961

DOI:https://doi.org/10.1103/PhysRev.125.1339

©1962 American Physical Society

Authors & Affiliations

Lynn B. Brown* and H. B. Knowles

  • Lawrence Radiation Laboratory, University of California, Livermore, California

  • *Present Address: Lawrence Radiation Laboratory, University of California, Berkeley, California.
  • Present Address: Physics Department, Yale University, New Haven, Connecticut.

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Issue

Vol. 125, Iss. 4 — February 1962

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