The Penetration of Gamma-Radiation through Thick Layers II. Plane Geometry, Iron, and Lead

Joseph O. Hirschfelder; Edward N. Adams, II

doi:10.1103/PhysRev.73.863

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The Penetration of Gamma-Radiation through Thick Layers II. Plane Geometry, Iron, and Lead

Joseph O. Hirschfelder and Edward N. Adams, II

Department of Chemistry, University of Wisconsin, Madison, Wisconsin

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Phys. Rev. 73, 863 – Published 15 April, 1948

DOI: https://doi.org/10.1103/PhysRev.73.863

Abstract

The method for considering the multiple scattering of gamma-rays given in Part I is extended to include the photoelectric effect and pair formation. Numerical calculations are made for the penetration of a monochromatic beam of gamma-rays through targets of either iron or lead. The thicknesses required to reduce the energy flux of factors of 2, 10, 100, 1000, and $10^{6}$ are tabulated for gamma-rays of 1, 3, and 5 Mev passing through air, water, concrete, iron, or lead; and the corresponding absorbtion coefficients are given. The distinction between roentgen per unit time and energy flux is considered and numerical tables are given for the decrease in dosage with increasing target thickness. Rough experimental agreement is obtained with the rough experimental data now available. The need for careful measurements of the absorbtion of monochromatic gamma-rays passing through very thick targets is pointed out.

References (11)

J. O. Hirschfelder, J. L. Magee, and M. H. Hull, "Penetration of gamma-radiation through thick layers. I. Plane geometry, Klein-Nishina scattering," Phys. Rev. 73, 851 (1948)
W. Heitler, Quantum Theory of Radiation (Oxford University Press, London, 1944), 2nd edition, Appendix II, p. 259
Hulme, McDowgall, Buckingham, and Fowler, Proc. Roy. Soc. London 139, 150 (1935) J. A. Gray, Proc. Roy. Soc. Canada 21, 179 (1927)
O. W. Eshbach, Handbook of Engineering Fundamentals (John Wiley and Sons, Inc., New York, 1936)
Rutherford, Chadwick, and Ellis, Radiations from Radioactive Substances (The Macmillan Company, New York, 1930), p. 464
W. Gentner, Physik. Zeits. 38, 836 (1937)
Harvey Hall, Rev. Mod. Phys. 8, 358 (1936)
K. W. F. Kohlrausch, Akad. Wiss. Wien Ber. 126 (4), 441 (1917) ibid.126683 (1917) ibid.126(2a) 705 (1917) ibid.126(2a), 887 (1917)
G. J. Sizoo and H. Willemsen, Physica 5, 100 (1938)
H. M. Parker, Clinton Laboratory Lecture Series (unclassified), Lecture V (May 1944)
J. E. Roberts, Phil. Mag. 36, 264 (1945)

[c1] J. O. Hirschfelder, J. L. Magee, and M. H. Hull, "Penetration of gamma-radiation through thick layers. I. Plane geometry, Klein-Nishina scattering," Phys. Rev. 73, 851 (1948)

[c2] W. Heitler, Quantum Theory of Radiation (Oxford University Press, London, 1944), 2nd edition, Appendix II, p. 259

[c3] Hulme, McDowgall, Buckingham, and Fowler, Proc. Roy. Soc. London 139, 150 (1935) J. A. Gray, Proc. Roy. Soc. Canada 21, 179 (1927)

[c4] O. W. Eshbach, Handbook of Engineering Fundamentals (John Wiley and Sons, Inc., New York, 1936)

[c5] Rutherford, Chadwick, and Ellis, Radiations from Radioactive Substances (The Macmillan Company, New York, 1930), p. 464

[c6] W. Gentner, Physik. Zeits. 38, 836 (1937)

[c7] Harvey Hall, Rev. Mod. Phys. 8, 358 (1936)

[c8] K. W. F. Kohlrausch, Akad. Wiss. Wien Ber. 126 (4), 441 (1917) ibid.126683 (1917) ibid.126(2a) 705 (1917) ibid.126(2a), 887 (1917)

[c9] G. J. Sizoo and H. Willemsen, Physica 5, 100 (1938)

[c10] H. M. Parker, Clinton Laboratory Lecture Series (unclassified), Lecture V (May 1944)

[c11] J. E. Roberts, Phil. Mag. 36, 264 (1945)

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The Penetration of Gamma-Radiation through Thick Layers II. Plane Geometry, Iron, and Lead

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