Abstract

By measuring the absorption of dilute aqueous solutions of KI with various known amounts of pure iodine added, the present writers have observed that the absorption coefficient at a wavelength of about 350 mμ is nearly proportional to the amount of iodine in the solution. Making use of this fact, the amount of excess iodine in additively V-colored KI crystal has been obtained. Taking into account that two iodine atoms are associated with a V2 center, the oscillator strength of the absorption band at 365 mμ has been estimated to be 1.10±0.16 by the Smakula formula.

© 1957 Optical Society of America

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References

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  1. F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1940), p. 662. A. Smakula, Z. Physik 59, 603 (1930).
    [CrossRef]
  2. D. L. Dexter, Phys. Rev. 101, 48 (1956).
    [CrossRef]
  3. F. G. Kleinschrod, Ann. Physik 21, 97 (1936).
    [CrossRef]
  4. See, for example, F. Seitz, Revs. Modern Phys. 26, 7 (1954).
    [CrossRef]
  5. E. Mollwo, Ann. Physik. 29, 394 (1937).
    [CrossRef]
  6. E. Mollwo, Nachr. Akad. Wiss. Göttingen1935, 215.
  7. Y. Uchida and Y. Nakai, J. Phys. Soc. Japan 8, 795 (1953); J. Phys. Soc. Japan 9, 928 (1954).
    [CrossRef]
  8. L. I. Katzin, J. Chem. Phys. 21, 490 (1953).
    [CrossRef]
  9. E. Mollwo and W. Roos, Göttingen Nachr. Math.-Natw. Kl. N. F. 1, 107 (1934).

1956 (1)

D. L. Dexter, Phys. Rev. 101, 48 (1956).
[CrossRef]

1954 (1)

See, for example, F. Seitz, Revs. Modern Phys. 26, 7 (1954).
[CrossRef]

1953 (2)

Y. Uchida and Y. Nakai, J. Phys. Soc. Japan 8, 795 (1953); J. Phys. Soc. Japan 9, 928 (1954).
[CrossRef]

L. I. Katzin, J. Chem. Phys. 21, 490 (1953).
[CrossRef]

1937 (1)

E. Mollwo, Ann. Physik. 29, 394 (1937).
[CrossRef]

1936 (1)

F. G. Kleinschrod, Ann. Physik 21, 97 (1936).
[CrossRef]

1934 (1)

E. Mollwo and W. Roos, Göttingen Nachr. Math.-Natw. Kl. N. F. 1, 107 (1934).

Dexter, D. L.

D. L. Dexter, Phys. Rev. 101, 48 (1956).
[CrossRef]

Katzin, L. I.

L. I. Katzin, J. Chem. Phys. 21, 490 (1953).
[CrossRef]

Kleinschrod, F. G.

F. G. Kleinschrod, Ann. Physik 21, 97 (1936).
[CrossRef]

Mollwo, E.

E. Mollwo, Ann. Physik. 29, 394 (1937).
[CrossRef]

E. Mollwo and W. Roos, Göttingen Nachr. Math.-Natw. Kl. N. F. 1, 107 (1934).

E. Mollwo, Nachr. Akad. Wiss. Göttingen1935, 215.

Nakai, Y.

Y. Uchida and Y. Nakai, J. Phys. Soc. Japan 8, 795 (1953); J. Phys. Soc. Japan 9, 928 (1954).
[CrossRef]

Roos, W.

E. Mollwo and W. Roos, Göttingen Nachr. Math.-Natw. Kl. N. F. 1, 107 (1934).

Seitz, F.

See, for example, F. Seitz, Revs. Modern Phys. 26, 7 (1954).
[CrossRef]

F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1940), p. 662. A. Smakula, Z. Physik 59, 603 (1930).
[CrossRef]

Uchida, Y.

Y. Uchida and Y. Nakai, J. Phys. Soc. Japan 8, 795 (1953); J. Phys. Soc. Japan 9, 928 (1954).
[CrossRef]

Ann. Physik (1)

F. G. Kleinschrod, Ann. Physik 21, 97 (1936).
[CrossRef]

Ann. Physik. (1)

E. Mollwo, Ann. Physik. 29, 394 (1937).
[CrossRef]

Göttingen Nachr. Math.-Natw. Kl. N. F. (1)

E. Mollwo and W. Roos, Göttingen Nachr. Math.-Natw. Kl. N. F. 1, 107 (1934).

J. Chem. Phys. (1)

L. I. Katzin, J. Chem. Phys. 21, 490 (1953).
[CrossRef]

J. Phys. Soc. Japan (1)

Y. Uchida and Y. Nakai, J. Phys. Soc. Japan 8, 795 (1953); J. Phys. Soc. Japan 9, 928 (1954).
[CrossRef]

Phys. Rev. (1)

D. L. Dexter, Phys. Rev. 101, 48 (1956).
[CrossRef]

Revs. Modern Phys. (1)

See, for example, F. Seitz, Revs. Modern Phys. 26, 7 (1954).
[CrossRef]

Other (2)

F. Seitz, Modern Theory of Solids (McGraw-Hill Book Company, Inc., New York, 1940), p. 662. A. Smakula, Z. Physik 59, 603 (1930).
[CrossRef]

E. Mollwo, Nachr. Akad. Wiss. Göttingen1935, 215.

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Figures (4)

Fig. 1
Fig. 1

Absorption curves of aqueous solutions of KI with various amounts of iodine added. Curve A: I2/KI=0.80γ/40 mg per 1 cc; Curve B: V/KI=unknown/40 mg per 1 cc; Curve C: I2/KI=0.25γ/40 mg per 1 cc; Curve D: KI=40 mg per 1 cc, where γ stands for 10−6 g.

Fig. 2
Fig. 2

Optical density of 350 mμ band in aqueous solution of KI plotted against the amounts of iodine added.

Fig. 3
Fig. 3

V band in additively colored KI. Solid-line curve: measured at liquid air temperature; broken-line curve: measured at room temperature; chain-line curve: blank absorption at low temperature.

Fig. 4
Fig. 4

Resolution of the V band in KI measured at liquid air temperature. This figure should be compared with Fig. 4 in reference 7.

Tables (1)

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Table I Summary of data to estimate the oscillator strength

Equations (1)

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n 0 f = 1.29 × 10 17 n ( n 2 + 2 ) 2 α m W .