Abstract

A method of measuring refractive indices of gases by observations of Rayleigh scattered light is described. The method depends on the fact that the intensity of such scattered light is proportional to the square of the refractivity of the gas. Results are presented for several gases at a wavelength of 1216 Å. The values are placed on an absolute basis by use of the value of the refractive index of nitrogen found at 1220 Å by the Čerenkov method. Some extensions of the method are suggested.

© 1963 Optical Society of America

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References

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  1. D. W. O. Heddle, R. E. Jennings, and A. S. L. Parsons (preceding paper).
  2. See for instance: M. Born, Optik (Springer-Verlag, Berlin, 1933).
    [Crossref]
  3. R. W. Ditchburn, J. E. S. Bradley, C. G. Cannon, and G. Munday in Rocket Exploration of the Upper Atmosphere, edited by R. L. F. Boyd and M. J. Seaton (Pergamon Press, Ltd., London, 1954).
  4. R. T. Brackman, W. L. Fite, and K. E. Hagen, Rev. Sci. Instr. 29, 125 (1958).
    [Crossref]
  5. S. Bhagavantam, Light Scattering and the Raman Effect (Chemical Publishing Company Inc., New York, 1942).
  6. E. J. Stansbury, M. F. Crawford, and H. L. Walsh, Can. J. Phys. 31, 954 (1953).
    [Crossref]
  7. T. Yoshino and H. J. Bernstein, J. Mol. Spectry. 2, 213 (1958).
    [Crossref]
  8. A. Dalgarno and A. C. Stewart, Proc. Phys. Soc. (London) 75, 49 (1960).
    [Crossref]
  9. J. P. Hennes, R. Scolnik, and A. K. Stober (Los Angeles Meeting of The Optical Society of America, 18October1961, Paper WC19).

1960 (1)

A. Dalgarno and A. C. Stewart, Proc. Phys. Soc. (London) 75, 49 (1960).
[Crossref]

1958 (2)

T. Yoshino and H. J. Bernstein, J. Mol. Spectry. 2, 213 (1958).
[Crossref]

R. T. Brackman, W. L. Fite, and K. E. Hagen, Rev. Sci. Instr. 29, 125 (1958).
[Crossref]

1953 (1)

E. J. Stansbury, M. F. Crawford, and H. L. Walsh, Can. J. Phys. 31, 954 (1953).
[Crossref]

Bernstein, H. J.

T. Yoshino and H. J. Bernstein, J. Mol. Spectry. 2, 213 (1958).
[Crossref]

Bhagavantam, S.

S. Bhagavantam, Light Scattering and the Raman Effect (Chemical Publishing Company Inc., New York, 1942).

Born, M.

See for instance: M. Born, Optik (Springer-Verlag, Berlin, 1933).
[Crossref]

Brackman, R. T.

R. T. Brackman, W. L. Fite, and K. E. Hagen, Rev. Sci. Instr. 29, 125 (1958).
[Crossref]

Bradley, J. E. S.

R. W. Ditchburn, J. E. S. Bradley, C. G. Cannon, and G. Munday in Rocket Exploration of the Upper Atmosphere, edited by R. L. F. Boyd and M. J. Seaton (Pergamon Press, Ltd., London, 1954).

Cannon, C. G.

R. W. Ditchburn, J. E. S. Bradley, C. G. Cannon, and G. Munday in Rocket Exploration of the Upper Atmosphere, edited by R. L. F. Boyd and M. J. Seaton (Pergamon Press, Ltd., London, 1954).

Crawford, M. F.

E. J. Stansbury, M. F. Crawford, and H. L. Walsh, Can. J. Phys. 31, 954 (1953).
[Crossref]

Dalgarno, A.

A. Dalgarno and A. C. Stewart, Proc. Phys. Soc. (London) 75, 49 (1960).
[Crossref]

Ditchburn, R. W.

R. W. Ditchburn, J. E. S. Bradley, C. G. Cannon, and G. Munday in Rocket Exploration of the Upper Atmosphere, edited by R. L. F. Boyd and M. J. Seaton (Pergamon Press, Ltd., London, 1954).

Fite, W. L.

R. T. Brackman, W. L. Fite, and K. E. Hagen, Rev. Sci. Instr. 29, 125 (1958).
[Crossref]

Hagen, K. E.

R. T. Brackman, W. L. Fite, and K. E. Hagen, Rev. Sci. Instr. 29, 125 (1958).
[Crossref]

Heddle, D. W. O.

D. W. O. Heddle, R. E. Jennings, and A. S. L. Parsons (preceding paper).

Hennes, J. P.

J. P. Hennes, R. Scolnik, and A. K. Stober (Los Angeles Meeting of The Optical Society of America, 18October1961, Paper WC19).

Jennings, R. E.

D. W. O. Heddle, R. E. Jennings, and A. S. L. Parsons (preceding paper).

Munday, G.

R. W. Ditchburn, J. E. S. Bradley, C. G. Cannon, and G. Munday in Rocket Exploration of the Upper Atmosphere, edited by R. L. F. Boyd and M. J. Seaton (Pergamon Press, Ltd., London, 1954).

Parsons, A. S. L.

D. W. O. Heddle, R. E. Jennings, and A. S. L. Parsons (preceding paper).

Scolnik, R.

J. P. Hennes, R. Scolnik, and A. K. Stober (Los Angeles Meeting of The Optical Society of America, 18October1961, Paper WC19).

Stansbury, E. J.

E. J. Stansbury, M. F. Crawford, and H. L. Walsh, Can. J. Phys. 31, 954 (1953).
[Crossref]

Stewart, A. C.

A. Dalgarno and A. C. Stewart, Proc. Phys. Soc. (London) 75, 49 (1960).
[Crossref]

Stober, A. K.

J. P. Hennes, R. Scolnik, and A. K. Stober (Los Angeles Meeting of The Optical Society of America, 18October1961, Paper WC19).

Walsh, H. L.

E. J. Stansbury, M. F. Crawford, and H. L. Walsh, Can. J. Phys. 31, 954 (1953).
[Crossref]

Yoshino, T.

T. Yoshino and H. J. Bernstein, J. Mol. Spectry. 2, 213 (1958).
[Crossref]

Can. J. Phys. (1)

E. J. Stansbury, M. F. Crawford, and H. L. Walsh, Can. J. Phys. 31, 954 (1953).
[Crossref]

J. Mol. Spectry. (1)

T. Yoshino and H. J. Bernstein, J. Mol. Spectry. 2, 213 (1958).
[Crossref]

Proc. Phys. Soc. (London) (1)

A. Dalgarno and A. C. Stewart, Proc. Phys. Soc. (London) 75, 49 (1960).
[Crossref]

Rev. Sci. Instr. (1)

R. T. Brackman, W. L. Fite, and K. E. Hagen, Rev. Sci. Instr. 29, 125 (1958).
[Crossref]

Other (5)

S. Bhagavantam, Light Scattering and the Raman Effect (Chemical Publishing Company Inc., New York, 1942).

D. W. O. Heddle, R. E. Jennings, and A. S. L. Parsons (preceding paper).

See for instance: M. Born, Optik (Springer-Verlag, Berlin, 1933).
[Crossref]

R. W. Ditchburn, J. E. S. Bradley, C. G. Cannon, and G. Munday in Rocket Exploration of the Upper Atmosphere, edited by R. L. F. Boyd and M. J. Seaton (Pergamon Press, Ltd., London, 1954).

J. P. Hennes, R. Scolnik, and A. K. Stober (Los Angeles Meeting of The Optical Society of America, 18October1961, Paper WC19).

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Figures (6)

Fig. 1
Fig. 1

Diagram of the scattering apparatus.

Fig. 2
Fig. 2

The ratio of scattered to incident intensities for argon.

Fig. 3
Fig. 3

The ratio of scattered to incident intensities for krypton.

Fig. 4
Fig. 4

The ratio of scattered to incident intensities for xenon.

Fig. 5
Fig. 5

The ratio of scattered to incident intensities for hydrogen.

Fig. 6
Fig. 6

The ratio of scattered to incident intensities for nitrogen.

Tables (1)

Tables Icon

Table I Refractivities at 1216 Å.

Equations (9)

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( n 2 1 ) 2 ( n 1 ) = 4 π α 0 N ,
ϕ θ d ω = Φ 2 π 2 ( n 1 ) 2 V λ 2 N ( 6 6 7 ρ n ) × ( 1 + cos 2 θ + ρ n sin 2 θ ) d ω .
( n 1 ) = ( n 0 1 ) p ( 273 / T ) .
ϕ 90 d ω Φ = 2 π 2 ( n 0 1 ) 2 p V λ 4 N 0 ( 273 T ) 2 ( 6 + 6 ρ n 6 7 ρ n ) d ω ,
( n 0 1 ) 2 = ( 6 7 ρ n 6 + 6 ρ n ) K d ( j 90 / J ) d p ,
S i = d ( j 90 / J ) d d p
S Ar = k S Ar = 1
( n 0 1 ) i 2 ( n 0 1 ) Ar 2 = ( 6 7 ρ n 6 + 6 ρ n ) i S i S Ar , = ( 6 7 ρ n 6 + 6 ρ n ) i S i .
S He = ( 4.27 / 56.5 ) 2 0.006 ,