N. Ioli, F. Strumia, and A. Moretti, "Measurement of Sodium-Vapor Density at Very Low Pressures by an Optical Method*," J. Opt. Soc. Am. 61, 1251-1256 (1971)
The density of sodium-saturated vapor has been measured in the range 100°C–180°C. The density values were obtained by measuring the absorption coefficient of the DI line by magnetic scanning. The absorption line was scanned by placing a spectral lamp in a variable magnetic field and by filtering out one of the components of the emitted D1 line. The experimental points have been fitted with the equation logp = A − B/T + C logT. Together with our measurements we considered as well all of the other available data below 300°C. The best values of A, B, and C were found to be A = −55.182 40; B = 1081.2523; C = 20.029 33.
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G. Stephenson, Proc. Roy Soc. (London) A64, 458 (1951).
W. Demtroder, Z. Physik 166, 42 (1962).
G. V. Markova and M. P. Chaika, Opt. Spektrosk 17, 319 (1964) [Opt. Spectrosc. 17, 170 (1964)].
E. Hulpke, E. Paul, and W. Paul, Z. Physik 177, 257 (1964).
H. Ackermann, Z. Physik 194, 253 (1966).
J. K. Link, J. Opt. Soc. Am. 56, 1195 (1966).
P. T. Cunningham and J. K. Link, J. Opt. Soc. Am. 57, 1000 (1967).
B. P. Kibble, G. Copley, and L. Krause, Phys. Rev. 153, 9 (1967).
D. Schonberner and D. Zimmermann, Z. Physik. 216, 172 (1968).
C. A. Forbrich, Jr., W. C. Marlow, and D. Bershader, Phys. Rev. 173, 150 (1968).
C. Bästlein, G. Baumgartner, and B. Brosa, Z. Physik 218, 319 (1969).
R. J. Wolff and S. P. Davis, J. Opt. Soc. Am. 58, 490 (1968).
M. Baumann, Z. Naturforsch 24a, 1049 (1969).
A. L. Mashinskii, Opt. Spektrosk. 28, 3 (1970) [Opt. Spectrosc. 28, 1 (1970)].
R. W. Schmieder, A. Lurio, W. Happer, and A. Khadjavi, Phys. Rev. 2A, 1216 (1970).
Table III
Values of the Na-vapor density obtained in this paper. The values marked with an asterisk were measured after the aging of the cells.
Temperature (°C)
Density (1010 atoms/cm3)
Cell 1
113.4
1.65±0.15
125.0
4.0±0.3
133.0
6.4±0.4
139.0
8.95±0.8
151.8
18.5±1.5
Cell 2
123.5
3.3±0.3
129.0
4.3±0.4
129.0
4.4±0.4
137.2
7.5±0.7
143.8
11.75±0.5
155.0
23.0±1.5
Cell 3
104.3
1.14±0.2
106.0*
1.20±0.3
111.5*
1.35±0.25
114.0
1.74±0.2
116.5
2.16±0.25
117.0*
2.0±0.3
118.5
2.78±0.2
118.5*
2.65±0.2
123.6
3.2±0.2
127.1*
4.0±0.4
128.4
4.55±0.4
131.0*
5.8±0.3
151.0*
15.6±2
Cell 4
154.8*
21.5±2
154.8*
22.0±2
159.7
28.0±1.5
163.8*
38.0±3
166.0
39.0±3
170.7
54±4
173.2
54±4
175.0*
70±5
176.5*
70±5
179.5
84±5
Table IV
Values of Na-vapor density below 300°C found in the previous literature.
W. H. Rodebush and T. de Vries, J. Am. Chem. Soc. 47, 2488 (1925).
W. H. Rodebush and W. F. Henry, J. Am. Chem. Soc. 52, 3159 (1930).
J. Weiler, Ann. Physik 1, 361 (1929).
W. Edmondson and A. Egerton, Proc. Roy. Soc. (London) A113, 520 (1927).
R. Ladenburg and K. Minkowski, Z. Physik 6, 153 (1921).
Tables (4)
Table I
Specifications of the cells used for the measurements of Na-vapor density. The ΔνK was computed without deconvolution correction.
Cell No.
Cell length (cm)
Gas
Pressure (torr)
Δνg/Δνg
1
11.2±0.05
Ne
272
3.0
2
11.2±0.05
He
314
3.6
3
24.2±0.05
He
188
3.1
4
5.0±0.05
Ar
421
6.4
Table II
Values of the lifetime τ of the 32P levels of Na. The weighted average is τ = 16.035±0.18.
G. Stephenson, Proc. Roy Soc. (London) A64, 458 (1951).
W. Demtroder, Z. Physik 166, 42 (1962).
G. V. Markova and M. P. Chaika, Opt. Spektrosk 17, 319 (1964) [Opt. Spectrosc. 17, 170 (1964)].
E. Hulpke, E. Paul, and W. Paul, Z. Physik 177, 257 (1964).
H. Ackermann, Z. Physik 194, 253 (1966).
J. K. Link, J. Opt. Soc. Am. 56, 1195 (1966).
P. T. Cunningham and J. K. Link, J. Opt. Soc. Am. 57, 1000 (1967).
B. P. Kibble, G. Copley, and L. Krause, Phys. Rev. 153, 9 (1967).
D. Schonberner and D. Zimmermann, Z. Physik. 216, 172 (1968).
C. A. Forbrich, Jr., W. C. Marlow, and D. Bershader, Phys. Rev. 173, 150 (1968).
C. Bästlein, G. Baumgartner, and B. Brosa, Z. Physik 218, 319 (1969).
R. J. Wolff and S. P. Davis, J. Opt. Soc. Am. 58, 490 (1968).
M. Baumann, Z. Naturforsch 24a, 1049 (1969).
A. L. Mashinskii, Opt. Spektrosk. 28, 3 (1970) [Opt. Spectrosc. 28, 1 (1970)].
R. W. Schmieder, A. Lurio, W. Happer, and A. Khadjavi, Phys. Rev. 2A, 1216 (1970).
Table III
Values of the Na-vapor density obtained in this paper. The values marked with an asterisk were measured after the aging of the cells.
Temperature (°C)
Density (1010 atoms/cm3)
Cell 1
113.4
1.65±0.15
125.0
4.0±0.3
133.0
6.4±0.4
139.0
8.95±0.8
151.8
18.5±1.5
Cell 2
123.5
3.3±0.3
129.0
4.3±0.4
129.0
4.4±0.4
137.2
7.5±0.7
143.8
11.75±0.5
155.0
23.0±1.5
Cell 3
104.3
1.14±0.2
106.0*
1.20±0.3
111.5*
1.35±0.25
114.0
1.74±0.2
116.5
2.16±0.25
117.0*
2.0±0.3
118.5
2.78±0.2
118.5*
2.65±0.2
123.6
3.2±0.2
127.1*
4.0±0.4
128.4
4.55±0.4
131.0*
5.8±0.3
151.0*
15.6±2
Cell 4
154.8*
21.5±2
154.8*
22.0±2
159.7
28.0±1.5
163.8*
38.0±3
166.0
39.0±3
170.7
54±4
173.2
54±4
175.0*
70±5
176.5*
70±5
179.5
84±5
Table IV
Values of Na-vapor density below 300°C found in the previous literature.
W. H. Rodebush and T. de Vries, J. Am. Chem. Soc. 47, 2488 (1925).
W. H. Rodebush and W. F. Henry, J. Am. Chem. Soc. 52, 3159 (1930).
J. Weiler, Ann. Physik 1, 361 (1929).
W. Edmondson and A. Egerton, Proc. Roy. Soc. (London) A113, 520 (1927).
R. Ladenburg and K. Minkowski, Z. Physik 6, 153 (1921).