Abstract

The effective scattering cross sections for metal spheres have been measured through the resonance region, using wavelengths between 0.45 and 15 microns. Spheres of iron and copper sorted into reasonably narrow diameter distributions between 2 and 20 microns were supported in layers on Pliofilm and silver chloride. The results are given in terms of the scattering area coefficient <i>k</i> (the ratio of scattering cross section to projected area of the spheres) as a function of α(the ratio of sphere circumference to the wavelength used). These results are in general accord with qualitative predictions based on the Mie theory. Detail in the resonance region is obscured by the finite diameter distributions of the samples.

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  1. G. Mie, Ann. Physik 25, 277 (1908).
  2. J. A. Stratton, Electromagnetic Theory (McGraw-Hill Book Company, Inc., New York, 1944).
  3. Lord Rayleigh, Phil. Mag. 41, 447 (1871); Phil Mag. 12, 81 (1881).
  4. J. A. Stratton and H. G. Houghton, Phys. Rev. 36, 159 (1931).
  5. H. G. Houghton and W. R. Chalker, J. Opt. Soc. Am. 39, 955 (1949).
  6. V. K. LaMer, J. Phys. and Colloid Chem. 52, 65 (1948).
  7. D. Sinclair, J. Opt. Soc. Am. 37, 475 (1947).
  8. A. N. Lowan, Tables of Scattering Functions for Spherical Particles (National Bureau of Standards, Applied Mathematics Series 4, 1949).
  9. M. D. Barnes and V. K. LaMer, J. Colloid Sci. 1, 71, 79 (1946).
  10. Barnes, Kenyon, Zeiser, and LaMer, J. Colloid Sci. 2, 257 (1947).
  11. A. J. F. Siegert, Radar System Engineering (McGraw-Hill Book Company, Inc., New York, 1947), MIT Radiation Laboratory Series 1, pp. 63–65.
  12. P. J. Rubenstein, MIT Radiation Laboratory Report, No. 42, April, 1943.
  13. A. L. Aden, J. Appl. Phys. 22, 601–605 (1951).
  14. L. Brillouin, J. Appl. Phys. 20, 1110 (1949).
  15. P. S. Roller, Bur. Mines Tech. Paper, No. 490 (1931); Proc. A.S.T.M. 32, 607 (1932); J. Am. Ceramic Soc. 20, 167 (1937).

Aden, A. L.

A. L. Aden, J. Appl. Phys. 22, 601–605 (1951).

Barnes, M. D.

M. D. Barnes and V. K. LaMer, J. Colloid Sci. 1, 71, 79 (1946).

Brillouin, L.

L. Brillouin, J. Appl. Phys. 20, 1110 (1949).

Chalker, W. R.

H. G. Houghton and W. R. Chalker, J. Opt. Soc. Am. 39, 955 (1949).

Houghton, H. G.

H. G. Houghton and W. R. Chalker, J. Opt. Soc. Am. 39, 955 (1949).

J. A. Stratton and H. G. Houghton, Phys. Rev. 36, 159 (1931).

LaMer, V. K.

M. D. Barnes and V. K. LaMer, J. Colloid Sci. 1, 71, 79 (1946).

V. K. LaMer, J. Phys. and Colloid Chem. 52, 65 (1948).

Lowan, A. N.

A. N. Lowan, Tables of Scattering Functions for Spherical Particles (National Bureau of Standards, Applied Mathematics Series 4, 1949).

Mie, G.

G. Mie, Ann. Physik 25, 277 (1908).

Rayleigh, Lord

Lord Rayleigh, Phil. Mag. 41, 447 (1871); Phil Mag. 12, 81 (1881).

Roller, P. S.

P. S. Roller, Bur. Mines Tech. Paper, No. 490 (1931); Proc. A.S.T.M. 32, 607 (1932); J. Am. Ceramic Soc. 20, 167 (1937).

Rubenstein, P. J.

P. J. Rubenstein, MIT Radiation Laboratory Report, No. 42, April, 1943.

Siegert, A. J. F.

A. J. F. Siegert, Radar System Engineering (McGraw-Hill Book Company, Inc., New York, 1947), MIT Radiation Laboratory Series 1, pp. 63–65.

Sinclair, D.

D. Sinclair, J. Opt. Soc. Am. 37, 475 (1947).

Stratton, J. A.

J. A. Stratton, Electromagnetic Theory (McGraw-Hill Book Company, Inc., New York, 1944).

J. A. Stratton and H. G. Houghton, Phys. Rev. 36, 159 (1931).

Other

G. Mie, Ann. Physik 25, 277 (1908).

J. A. Stratton, Electromagnetic Theory (McGraw-Hill Book Company, Inc., New York, 1944).

Lord Rayleigh, Phil. Mag. 41, 447 (1871); Phil Mag. 12, 81 (1881).

J. A. Stratton and H. G. Houghton, Phys. Rev. 36, 159 (1931).

H. G. Houghton and W. R. Chalker, J. Opt. Soc. Am. 39, 955 (1949).

V. K. LaMer, J. Phys. and Colloid Chem. 52, 65 (1948).

D. Sinclair, J. Opt. Soc. Am. 37, 475 (1947).

A. N. Lowan, Tables of Scattering Functions for Spherical Particles (National Bureau of Standards, Applied Mathematics Series 4, 1949).

M. D. Barnes and V. K. LaMer, J. Colloid Sci. 1, 71, 79 (1946).

Barnes, Kenyon, Zeiser, and LaMer, J. Colloid Sci. 2, 257 (1947).

A. J. F. Siegert, Radar System Engineering (McGraw-Hill Book Company, Inc., New York, 1947), MIT Radiation Laboratory Series 1, pp. 63–65.

P. J. Rubenstein, MIT Radiation Laboratory Report, No. 42, April, 1943.

A. L. Aden, J. Appl. Phys. 22, 601–605 (1951).

L. Brillouin, J. Appl. Phys. 20, 1110 (1949).

P. S. Roller, Bur. Mines Tech. Paper, No. 490 (1931); Proc. A.S.T.M. 32, 607 (1932); J. Am. Ceramic Soc. 20, 167 (1937).

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