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References

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  1. O. J. Edwards, J. Opt. Soc. Am. 56, 1314 (1966).
    [CrossRef]
  2. E. C. Beder et al., Appl. Opt. 10, 2263 (1971).
    [CrossRef] [PubMed]
  3. F. Urbach, Phys. Rev. 92, 1324 (1953).
    [CrossRef]
  4. J. D. Dow, Comments Solid State Phys. 4, 35 (1972).
  5. J. D. Dow, D. Redfield, Phys. Rev. B5, 584 (1972).
  6. D. Redfield, M. Afromowitz, Appl. Phys. Lett. 11, 138 (1967).
    [CrossRef]
  7. S. Schnatterly, Phys. Rev. B1, 921 (1970).
  8. J. Camassel, D. Auvergne, Phys. Rev. B12, 3258 (1975).
  9. Y. Brada et al., Phys. Rev. B12, 3494 (1975).
  10. Y. Toyozawa, Prog. Theor. Phys. (Kyoto) 22, 455 (1959).
    [CrossRef]
  11. S. Pantelides, W. Harrison, Phys. Rev. B13, 2667 (1976).
  12. J. Ziman, Electrons and Phonons (Oxford U. P., New York, 1960), p. 209.
  13. W. Kingery, Introduction to Ceramics (Wiley, New York, 1960), p. 706.
  14. R. Bruckner, J. Non-Cryst. Solids, 5, 123 (1970)
    [CrossRef]
  15. R. Knox, Theory of Excitons (Academic, New York, 1963), Ch. 3 and 4.
  16. R. Jeryan et al.J. Am. Ceramic Soc. 55, 71 (1972).
    [CrossRef]

1976 (1)

S. Pantelides, W. Harrison, Phys. Rev. B13, 2667 (1976).

1975 (2)

J. Camassel, D. Auvergne, Phys. Rev. B12, 3258 (1975).

Y. Brada et al., Phys. Rev. B12, 3494 (1975).

1972 (3)

J. D. Dow, Comments Solid State Phys. 4, 35 (1972).

J. D. Dow, D. Redfield, Phys. Rev. B5, 584 (1972).

R. Jeryan et al.J. Am. Ceramic Soc. 55, 71 (1972).
[CrossRef]

1971 (1)

1970 (2)

S. Schnatterly, Phys. Rev. B1, 921 (1970).

R. Bruckner, J. Non-Cryst. Solids, 5, 123 (1970)
[CrossRef]

1967 (1)

D. Redfield, M. Afromowitz, Appl. Phys. Lett. 11, 138 (1967).
[CrossRef]

1966 (1)

1959 (1)

Y. Toyozawa, Prog. Theor. Phys. (Kyoto) 22, 455 (1959).
[CrossRef]

1953 (1)

F. Urbach, Phys. Rev. 92, 1324 (1953).
[CrossRef]

Afromowitz, M.

D. Redfield, M. Afromowitz, Appl. Phys. Lett. 11, 138 (1967).
[CrossRef]

Auvergne, D.

J. Camassel, D. Auvergne, Phys. Rev. B12, 3258 (1975).

Beder, E. C.

Brada, Y.

Y. Brada et al., Phys. Rev. B12, 3494 (1975).

Bruckner, R.

R. Bruckner, J. Non-Cryst. Solids, 5, 123 (1970)
[CrossRef]

Camassel, J.

J. Camassel, D. Auvergne, Phys. Rev. B12, 3258 (1975).

Dow, J. D.

J. D. Dow, Comments Solid State Phys. 4, 35 (1972).

J. D. Dow, D. Redfield, Phys. Rev. B5, 584 (1972).

Edwards, O. J.

Harrison, W.

S. Pantelides, W. Harrison, Phys. Rev. B13, 2667 (1976).

Jeryan, R.

R. Jeryan et al.J. Am. Ceramic Soc. 55, 71 (1972).
[CrossRef]

Kingery, W.

W. Kingery, Introduction to Ceramics (Wiley, New York, 1960), p. 706.

Knox, R.

R. Knox, Theory of Excitons (Academic, New York, 1963), Ch. 3 and 4.

Pantelides, S.

S. Pantelides, W. Harrison, Phys. Rev. B13, 2667 (1976).

Redfield, D.

J. D. Dow, D. Redfield, Phys. Rev. B5, 584 (1972).

D. Redfield, M. Afromowitz, Appl. Phys. Lett. 11, 138 (1967).
[CrossRef]

Schnatterly, S.

S. Schnatterly, Phys. Rev. B1, 921 (1970).

Toyozawa, Y.

Y. Toyozawa, Prog. Theor. Phys. (Kyoto) 22, 455 (1959).
[CrossRef]

Urbach, F.

F. Urbach, Phys. Rev. 92, 1324 (1953).
[CrossRef]

Ziman, J.

J. Ziman, Electrons and Phonons (Oxford U. P., New York, 1960), p. 209.

Appl. Opt. (1)

Appl. Phys. Lett. (1)

D. Redfield, M. Afromowitz, Appl. Phys. Lett. 11, 138 (1967).
[CrossRef]

Comments Solid State Phys. (1)

J. D. Dow, Comments Solid State Phys. 4, 35 (1972).

J. Am. Ceramic Soc. (1)

R. Jeryan et al.J. Am. Ceramic Soc. 55, 71 (1972).
[CrossRef]

J. Non-Cryst. Solids (1)

R. Bruckner, J. Non-Cryst. Solids, 5, 123 (1970)
[CrossRef]

J. Opt. Soc. Am. (1)

Phys. Rev. (6)

F. Urbach, Phys. Rev. 92, 1324 (1953).
[CrossRef]

J. D. Dow, D. Redfield, Phys. Rev. B5, 584 (1972).

S. Pantelides, W. Harrison, Phys. Rev. B13, 2667 (1976).

S. Schnatterly, Phys. Rev. B1, 921 (1970).

J. Camassel, D. Auvergne, Phys. Rev. B12, 3258 (1975).

Y. Brada et al., Phys. Rev. B12, 3494 (1975).

Prog. Theor. Phys. (Kyoto) (1)

Y. Toyozawa, Prog. Theor. Phys. (Kyoto) 22, 455 (1959).
[CrossRef]

Other (3)

J. Ziman, Electrons and Phonons (Oxford U. P., New York, 1960), p. 209.

W. Kingery, Introduction to Ceramics (Wiley, New York, 1960), p. 706.

R. Knox, Theory of Excitons (Academic, New York, 1963), Ch. 3 and 4.

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Figures (2)

Fig. 1
Fig. 1

Absorption edge vs temperature of fused quartz.

Fig. 2
Fig. 2

Absorption spectrum of fused quartz (Suprasil) as a function of temperature.

Tables (1)

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Table I Urbach Parameters at Various Temperatures

Equations (4)

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α = α o exp [ σ ( h ν - h ν o ) / k T ] ,
α = 7.65 × 10 4 exp [ 0.622 ( h ν - 8.21 ) / k T ] .
σ = α o ( 2 k T ω o ) tan h ( ω o 2 k T )
ω o = ( ɛ ɛ ) 1 / 2 ω r ,

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