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Penetration and Diffusion of Hard X-Rays through Thick Barriers. I. The Approach to Spectral Equilibrium

H. A. Bethe

U. Fano and P. R. Karr

  • Cornell University, Ithaca, New York

  • National Bureau of Standards, Washington, D.C.

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Phys. Rev. 76, 538 – Published 15 August, 1949

DOI: https://doi.org/10.1103/PhysRev.76.538

Abstract

When some of the secondary components of a complex radiation are barely softer than the primary, the process of formation and decay of these components alone governs the approach to equilibrium. It is then possible to determine the asymptotic trend of the total radiation intensity at great depths of penetration. Under broad assumptions, this trend is xK0exp(−μ0x).

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See Also

Penetration and Diffusion of Hard X-Rays through Thick Barriers. III. Studies of Spectral Distributions

P. R. Karr and J. C. Lamkin
Phys. Rev. 76, 1843 (1949)

Penetration and Diffusion of Hard X-Rays through Thick Barriers. IV. Multiply Scattered γ-Rays: Angular Distribution

L. V. Spencer and Fannie Jenkins
Phys. Rev. 76, 1885 (1949)

References (3)

  1. Jahnke-Emde, Tables of Functions (B. G. Teubner, Leipzig, 1933 and Dover Publications, New York, 1943), p. 275
  2. OSRD Rept. No. 4488, Vol. 4. U. S. Library of Congress
  3. General Electric Company Report HAB-1, A-4251, June 24, 1947

Outline

Information

Phys. Rev. 76, 538– Published 15 August, 1949
  • Received 25 April 1949

© 1949 American Physical Society

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