Abstract

A spectroscopic method, useful for strongly absorbed lines, has been investigated for measuring temperatures of hot gases. The minimum transmission of discrete spectral lines in gases at equilibrium has a simple dependence upon the absolute temperature and this relation is used to measure temperature from a straight line plot. An experimental study has been made of the absorption due to the rotational lines of OH (<sup>2</sup>Σ←<sup>2</sup>II) between 3067 and 3090 A in an oxygen-acetylene flame. It is shown that temperatures measured by this method are less affected than the conventional one by lack of sufficient resolving power, flame thickness, and various light sources (either continuous or line).

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  1. (a)L. Huldt and E. Knall, Naturwiss. 41, 421 (1954); (b) E. Bright Wilson, Jr., and A. J. Wells, J. Chem. Phys. 14, 578 (1946).
  2. B. L. Crawford, Jr., and H. L. Dinsmore, J. Chem. Phys. 18, 983 (1950); 18, 1682 (1950).
  3. S. S. Penner, J. Chem. Phys. 20, 507 (1952).
  4. Broida Morowitz, and Selgin, J. Research Nat. Bur. Standard 52, 293 (1954).
  5. A. M. Bass and H. P. Broida, "A spectrophotometric atlas of the 2σ+2II transition of OH", National Bureau of Standards Circular 541 (1953).
  6. O. Oldenberg and F. F. Rieke, J. Chem. Phys. 6, 439 (1938); R. J. Dwyer and O. Oldenberg, J. Chem. Phys. 12, 351 (1944).
  7. W. A. Baum and L. Dunkelman, J. Opt. Soc. Am. 40, 782 (1950).
  8. William G. Fastie, J. Opt. Soc. Am. 42, 641 (1952).
  9. G. H. Dieke and H. M. Crosswhite, Bumblebee Series Report No. 87 (November, 1948) (unclassified).
  10. H. M. Foley, Phys. Rev. 69, 616 (1946); P. W. Anderson, Phys. Rev. 76, 647 (1949).
  11. K. E. Shuler, J. Chem. Phys. 18, 1466 (1950).
  12. H. P. Broida, J. Chem. Phys. 21, 1165 (1953).
  13. Benedict, Plyler, and Humphreys, J. Chem. Phys. 21, 398 (1953).

Bass, A. M.

A. M. Bass and H. P. Broida, "A spectrophotometric atlas of the 2σ+2II transition of OH", National Bureau of Standards Circular 541 (1953).

Baum, W. A.

W. A. Baum and L. Dunkelman, J. Opt. Soc. Am. 40, 782 (1950).

Broida, H. P.

H. P. Broida, J. Chem. Phys. 21, 1165 (1953).

A. M. Bass and H. P. Broida, "A spectrophotometric atlas of the 2σ+2II transition of OH", National Bureau of Standards Circular 541 (1953).

Crawford, Jr., B. L.

B. L. Crawford, Jr., and H. L. Dinsmore, J. Chem. Phys. 18, 983 (1950); 18, 1682 (1950).

Crosswhite, H. M.

G. H. Dieke and H. M. Crosswhite, Bumblebee Series Report No. 87 (November, 1948) (unclassified).

Dieke, G. H.

G. H. Dieke and H. M. Crosswhite, Bumblebee Series Report No. 87 (November, 1948) (unclassified).

Dinsmore, H. L.

B. L. Crawford, Jr., and H. L. Dinsmore, J. Chem. Phys. 18, 983 (1950); 18, 1682 (1950).

Dunkelman, L.

W. A. Baum and L. Dunkelman, J. Opt. Soc. Am. 40, 782 (1950).

Fastie, William G.

William G. Fastie, J. Opt. Soc. Am. 42, 641 (1952).

Foley, H. M.

H. M. Foley, Phys. Rev. 69, 616 (1946); P. W. Anderson, Phys. Rev. 76, 647 (1949).

Huldt, L.

(a)L. Huldt and E. Knall, Naturwiss. 41, 421 (1954); (b) E. Bright Wilson, Jr., and A. J. Wells, J. Chem. Phys. 14, 578 (1946).

Knall, E.

(a)L. Huldt and E. Knall, Naturwiss. 41, 421 (1954); (b) E. Bright Wilson, Jr., and A. J. Wells, J. Chem. Phys. 14, 578 (1946).

Morowitz, Broida

Broida Morowitz, and Selgin, J. Research Nat. Bur. Standard 52, 293 (1954).

Oldenberg, O.

O. Oldenberg and F. F. Rieke, J. Chem. Phys. 6, 439 (1938); R. J. Dwyer and O. Oldenberg, J. Chem. Phys. 12, 351 (1944).

Penner, S. S.

S. S. Penner, J. Chem. Phys. 20, 507 (1952).

Rieke, F. F.

O. Oldenberg and F. F. Rieke, J. Chem. Phys. 6, 439 (1938); R. J. Dwyer and O. Oldenberg, J. Chem. Phys. 12, 351 (1944).

Shuler, K. E.

K. E. Shuler, J. Chem. Phys. 18, 1466 (1950).

Other (13)

(a)L. Huldt and E. Knall, Naturwiss. 41, 421 (1954); (b) E. Bright Wilson, Jr., and A. J. Wells, J. Chem. Phys. 14, 578 (1946).

B. L. Crawford, Jr., and H. L. Dinsmore, J. Chem. Phys. 18, 983 (1950); 18, 1682 (1950).

S. S. Penner, J. Chem. Phys. 20, 507 (1952).

Broida Morowitz, and Selgin, J. Research Nat. Bur. Standard 52, 293 (1954).

A. M. Bass and H. P. Broida, "A spectrophotometric atlas of the 2σ+2II transition of OH", National Bureau of Standards Circular 541 (1953).

O. Oldenberg and F. F. Rieke, J. Chem. Phys. 6, 439 (1938); R. J. Dwyer and O. Oldenberg, J. Chem. Phys. 12, 351 (1944).

W. A. Baum and L. Dunkelman, J. Opt. Soc. Am. 40, 782 (1950).

William G. Fastie, J. Opt. Soc. Am. 42, 641 (1952).

G. H. Dieke and H. M. Crosswhite, Bumblebee Series Report No. 87 (November, 1948) (unclassified).

H. M. Foley, Phys. Rev. 69, 616 (1946); P. W. Anderson, Phys. Rev. 76, 647 (1949).

K. E. Shuler, J. Chem. Phys. 18, 1466 (1950).

H. P. Broida, J. Chem. Phys. 21, 1165 (1953).

Benedict, Plyler, and Humphreys, J. Chem. Phys. 21, 398 (1953).

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