All JournalsPhysics Magazine

Export citation

Export citation

Choose format for download:

Download Citation
  • Access by Xinjiang University

Polarization of the Gamma Rays in the F19(p, αγ)O16 Reaction

L. W. Fagg and S. S. Hanna

  • Department of Physics, Johns Hopkins University, Baltimore, Maryland

Phys. Rev. 92, 372 – Published 15 October, 1953

DOI: https://doi.org/10.1103/PhysRev.92.372

Abstract

The polarizations of the 6.13-, 6.9-, and 7.1-Mev gamma rays from the F19(p, α)O16*(γ)O16, Ep=0.87 Mev, reaction have been observed using the photodisintegration of the deuteron to detect polarization. Range measurements on the photoprotons separated the 6.13-Mev gamma ray from the other two, which were only slightly resolved. Knowing the relative intensities of the 6.9- and 7.1-Mev gamma rays and their unresolved angular distribution coefficient, it is possible, nevertheless, to deduce the separate polarizations from the observed total polarization. Polarization ratios, I(0°)I(90°), of 0.9±0.1, 1.9±0.3, and 0.4±0.3 were obtained for the 6.13-, 6.9-, and 7.1-Mev gamma rays, respectively, emitted at 90° to the proton beam. These values are in good agreement with the polarizations expected for the assignment of a 2 state in Ne20 and 3, 2+, and 1 states in O16 as deduced by Seed and French from directional correlation measurements on this reaction.

References (14)

  1. D. L. Falkoff, Phys. Rev. 73, 518 (1948)
  2. D. R. Hamilton, Phys. Rev. 74, 782 (1948)
  3. F. Metzger and M. Deutsch, Phys. Rev. 78, 551 (1950)
  4. A. P. French and J. O. Newton, Phys. Rev. 85, 1041 (1952)
  5. H. A. Bethe and R. F. Bacher, Revs. Modern Phys. 8, 122 (1936)
  6. D. H. Wilkinson, Phil. Mag. 43, 659 (1952)
  7. L. W. Fagg and S. S. Hanna, Phys. Rev. 88, 1205 (1952)
  8. G. Goldhaber, Phys. Rev. 81, 930 (1951)
  9. J. E. Sanders, Phil. Mag. 43, 630 (1952)
  10. J. Seed and A. P. French, Phys. Rev. 88, 1007 (1952)
  11. Dainton, Gottiker, and Lock, Phil. Mag. 42, 596 (1951)
  12. Biedenharn, Arfken, and Rose, Phys. Rev. 83, 586 (1951) Seed and French ([10])
  13. W. R. Arnold, Phys. Rev. 80, 34 (1950)
  14. Barnes, French, and Devons, Nature 166, 145 (1950)

Outline

Information

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation