MERCURY VAPOR PUMPS FOR OPERATING AGAINST HIGH PRESSURES.

Charles A. Kraus

doi:10.1021/ja02255a009

MERCURY VAPOR PUMPS FOR OPERATING AGAINST HIGH PRESSURES.

Journal of the American Chemical Society ◽

10.1021/ja02255a009 ◽

1917 ◽

Vol 39 (10) ◽

pp. 2183-2186 ◽

Cited By ~ 5

Author(s):

Charles A. Kraus

Keyword(s):

High Pressures ◽

Mercury Vapor

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INFLUENCE OF FOREIGN GASES AT HIGH PRESSURES ON THE SELECTIVE REFLECTION FROM MERCURY VAPOR

Canadian Journal of Physics ◽

10.1139/p57-012 ◽

1957 ◽

Vol 35 (1) ◽

pp. 114-121 ◽

Cited By ~ 2

Author(s):

H. L. Welsh ◽

J. A. Galt

Keyword(s):

Classical Theory ◽

High Pressures ◽

Mercury Vapor ◽

Selective Reflection ◽

Frequency Shifts ◽

Absorbing Medium ◽

Gas Density ◽

Reflection Data ◽

Collision Broadening

The influence of the foreign gases hydrogen, helium, nitrogen, and argon on the selective reflection from mercury vapor at 2537 Å was studied at pressures up to 1500 atm. The results were interpreted on the basis of the classical theory of reflection from an absorbing medium. The damping constant was found to vary linearly with foreign gas density as predicted by collision broadening theory. Frequency shifts and collision diameters determined from selective reflection data agree fairly well with values measured in absorption by other workers.

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SELECTIVE REFLECTION FROM MERCURY VAPOR AT HIGH PRESSURES

Canadian Journal of Physics ◽

10.1139/p57-011 ◽

1957 ◽

Vol 35 (1) ◽

pp. 98-113 ◽

Cited By ~ 14

Author(s):

H. L. Welsh ◽

J. A. Galt

Keyword(s):

Oscillator Strength ◽

Classical Theory ◽

Resonance Line ◽

High Pressures ◽

Mercury Vapor ◽

Square Root ◽

Special Design ◽

Selective Reflection ◽

Absorbing Medium ◽

Reflection Maximum

Selective reflection from mercury vapor in the region of the 2537 Å resonance line was investigated at pressures up to 340 atm. using reflection cells of special design. The results were interpreted on the basis of the classical theory of reflection from an absorbing medium. By fitting calculated curves to the experimental reflection contours, values of the oscillator strength, f, and the damping constant, γ, were determined. The f values so obtained are density-dependent and at high pressures are approximately equal to one half the value for the free atom. As predicted by theory, the damping constant varies directly as the density of the atoms in the vapor. This result contradicts the earlier work of Welsh, Kastner, and Lauriston (1950) in which it was concluded that γ varies as the square root of the density. A subsidiary reflection maximum was observed at 2540 Å; it is attributed to Hg2 molecules which occur in relatively large concentrations at high densities. Some preliminary observations on the selective reflection at the 1850 Å resonance line were made up to 4.4 atm.

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