Raman spectrum of solid hydrogen deuteride

1993 ◽  
Vol 47 (22) ◽  
pp. 14886-14897 ◽  
Author(s):  
J. J. Miller ◽  
R. L. Brooks ◽  
J. L. Hunt
Keyword(s):  
Raman Spectrum ◽  
Solid Hydrogen ◽  
Hydrogen Deuteride

The Raman spectrum of solid hydrogen

1965 ◽  
Vol 26 (11) ◽  
pp. 615-620 ◽  
Author(s):  
E.J. Allin ◽  
A.H. M ◽  
V. Soots ◽  
H.L. Welsh
Keyword(s):  
Raman Spectrum ◽  
Solid Hydrogen

Fundamental and Overtone Vibrational Transitions in the Raman Spectrum of h.c.p. Solid Hydrogen

1972 ◽  
Vol 50 (13) ◽  
pp. 1471-1479 ◽  
Author(s):  
William R. C. Prior ◽  
Elizabeth J. Allin
Keyword(s):  
Raman Spectrum ◽  
Relative Intensity ◽  
Argon Laser ◽  
Solid Hydrogen ◽  
Frequency Separation ◽  
Frequency Change ◽  
Quadrupolar Interaction ◽  
Vibrational Coupling ◽  
Frequency Shifts ◽  
Vibrational Overtone

The use of an argon laser of high intensity has made it possible to observe the vibrational overtone of solid hydrogen and to study the fundamental over a wider concentration range than previously. At ortho concentrations below ~ 15% the Q1(1) line has two components. The dependence on concentration and temperature of the frequency separation and relative intensity of these components is accounted for by the quadrupolar interaction between ortho molecules. Differences in the frequency shifts of the Q1(0) and the Q1(1) and of the Q2(0) and the Q1(1) lines in mixtures of all concentrations are also related to the quadrupolar interactions. The overtone lines show almost no frequency change with concentration. This is explained by a much smaller vibrational coupling due to the isotropic interactions in the ν = 2 than in the ν = 1 state. Confirmation of this is found in the small enhancement of the intensity of Q2(1) relative to Q2(0). The measurement of the frequency of Q2(0) makes it possible to determine the parameters μ1, and μ2, specifying the change in the intramolecular potential by the isotropic interactions, from transitions involving J = 0 states alone.

AN INTENSITY ANOMALY IN THE RAMAN SPECTRA OF SOLID AND LIQUID HYDROGEN AND DEUTERIUM

1967 ◽  
Vol 45 (11) ◽  
pp. 3589-3595 ◽  
Author(s):  
A. H. Mckague Rosevear ◽  
G. Whiting ◽  
Elizabeth J. Allin
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Molecular Interaction ◽  
Intensity Ratio ◽  
Liquid Hydrogen ◽  
Solid Hydrogen ◽  
Solid Deuterium ◽  
Number Ratio ◽  
Measured Ratio

In the absence of molecular interaction the ratio of the intensity of the Q1(1) to that of the Q1(0) vibrational line in the Raman spectrum of solid hydrogen should be equal to the ratio of the number of ortho to the number of para molecules. The measured ratio at 2 °K has been found to be two to three times greater than this (Soots et al. 1965). The same anomaly is shown to be present at ~13.5 °K and also in the spectrum of the liquid. In the spectrum of solid deuterium the anomaly is much greater; the intensity ratio varies from 9.3 times the number ratio for n-D2 to 50 times the number ratio for 3.7% para-D2. The S1(0) and S1(1) lines do not show any corresponding anomaly. The experimental observations can be explained by the theory of vibrational interaction between ortho and para molecules developed recently by James and Van Kranendonk (1967a, b).

VIBRATIONAL FREQUENCY PERTURBATIONS IN THE RAMAN SPECTRUM OF HYDROGEN

1965 ◽  
Vol 43 (10) ◽  
pp. 1836-1842 ◽  
Author(s):  
A. D. May ◽  
J. D. Poll
Keyword(s):  
Raman Spectrum ◽  
Vibrational Frequency ◽  
Adiabatic Approximation ◽  
Intermolecular Forces ◽  
Solid Hydrogen ◽  
Hydrogen Gas ◽  
Lattice Vibrations

The influence of the lattice vibrations on the shift of the vibrational Raman lines in solid hydrogen and the influence of nonadditive intermolecular forces on the shift in hydrogen gas are investigated for freely rotating molecules in terms of the adiabatic approximation. It is shown that the experimental value for the shift in the solid (Soots et al. 1965) can be accounted for by introducing a reasonable value for the amplitude of the lattice vibrations. The effect of the nonadditive intermolecular forces on the shift in hydrogen gas is shown to be appreciable at high densities.

R_{0}(0) transition in the absorption spectrum of solid hydrogen deuteride (HD)

1988 ◽  
Vol 37 (4) ◽  
pp. 2357-2359 ◽  
Author(s):  
Sang Lee ◽  
Sung-Ik Lee ◽  
James Gaines ◽  
R. Tipping ◽  
J. Poll
Keyword(s):  
Absorption Spectrum ◽  
Solid Hydrogen ◽  
Hydrogen Deuteride

Charge-induced absorption in proton-beam-irradiated solid hydrogen deuteride

1988 ◽  
Vol 66 (11) ◽  
pp. 1025-1030 ◽  
Author(s):  
J. J. Miller ◽  
R. L. Brooks ◽  
J. L. Hunt ◽  
J. D. Poll
Keyword(s):  
Solid Hydrogen ◽  
Cluster Ions ◽  
Hydrogen Impurity ◽  
Hydrogen Deuteride ◽  
Electron Bubbles ◽  
Induced Absorption ◽  
The Third ◽  
Doublet Structure ◽  
Third Line ◽  
Mev Protons

The charge-induced absorption spectrum in the fundamental band of solid hydrogen deuteride irradiated by a beam of 15 MeV protons has been observed. Four charge-induced absorption lines were seen, including one due to a small hydrogen impurity in the sample. Two of the three HD lines are caused by electron bubbles in the solid. These lines have been named Q1(0)− and S1(0)−, indicating the parent transition and the sign of the perturbing charge. Under higher resolution, the third line, named Q1(0)+, shows a doublet structure. The possibility that this doublet structure is caused by [Formula: see text] cluster ions is examined. A comparison of the timing and temperature dependence of the charge-induced lines in HD is made with previous results in D2.

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