Infrared absorption of solid nitrogen at high pressures

1996 ◽  
Vol 54 (13) ◽  
pp. 8962-8964 ◽  
Author(s):  
M. D. McCluskey ◽  
L. Hsu ◽  
L. Wang ◽  
E. E. Haller
Keyword(s):  
Infrared Absorption ◽  
High Pressures ◽  
Solid Nitrogen

scholarly journals Near Infrared Absorption of Ethylene between 8200 cm-1 and 9500 cm-1 to High Pressures and Temperatures

1976 ◽  
Vol 31 (12) ◽  
pp. 1690-1695 ◽  
Author(s):  
F. W. Nees ◽  
M. Buback
Keyword(s):  
Infrared Absorption ◽  
High Frequency ◽  
Near Infrared ◽  
High Pressures ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Experimental Conditions ◽  
High Pressure High Temperature ◽  
Wide Range ◽  
Integrated Intensity

AbstractThe near infrared absorption of pure ethylene in the region of the second overtone of the C-H stretching fundamentals (8200 cm-1 to 9500 cm-1) was measured at supercritical temperatures (Tc = 9.5 °C) between 22 °C and 200 °C from 0.7 bar to 3000 bar. The density and temperature dependence of bandshape, maximum frequency and absorption intensity are reported and discussed. The bands observed within a wide range of experimental conditions are assigned to combination and overtone modes. The molar integrated intensity B̅λ determined between the wavelength of maximum absorption and the high frequency absorption boundary was observed to be independent of pressure and temperature. This enables spectroscopic concentration determinations on ethylene in high pressure - high temperature phase equilibria and reactions.

New phase in solid nitrogen at high pressures

1985 ◽  
Vol 32 (1) ◽  
pp. 514-515 ◽  
Author(s):  
M. Grimsditch
Keyword(s):  
High Pressures ◽  
Solid Nitrogen ◽  
New Phase

scholarly journals Infrared absorption characteristics of solid nitrogen at near-triple point temperatures

2015 ◽  
Vol 64 (7) ◽  
pp. 073301
Author(s):  
Cao Shan ◽  
Liu Jiang-Ping ◽  
Li Jun ◽  
Wang Kai ◽  
Lin Wei ◽  
...  
Keyword(s):  
Infrared Absorption ◽  
Triple Point ◽  
Solid Nitrogen ◽  
Absorption Characteristics

Ab Initio Calculations of Infrared Absorption Cross Sections of CO2 Gas

2008 ◽  
Author(s):  
Zhi Liang ◽  
Hai-Lung Tsai
Keyword(s):  
Ab Initio ◽  
Cross Sections ◽  
Infrared Absorption ◽  
High Pressures ◽  
Vibrational Energy ◽  
Dipole Moments ◽  
Golden Rule ◽  
Absorption Cross ◽  
Transition Dipole ◽  
Co2 Gas

An ab initio model is used to determine the infrared absorption cross sections of CO2 gas as a function of laser wavelength. The intra-molecular potential energy and electric dipole moment of the CO2 molecule as a function of molecular nuclear configurations are obtained by solving the Kohn-Sham (KS) equation. The rotational constants at different vibrational levels, the vibrational energy eigen values and transition dipole moments are determined by solving the pure vibrational Schro¨dinger equation. Using the Fermi’s Golden Rule and all the calculated ab initio results, the absorption cross sections of CO2 gas at room temperature and one atmosphere pressure are obtained. The calculated results have a good agreement with experimental results. Based on the calculated ab initio results, the infrared absorption cross sections of CO2 gas at higher pressures are calculated. The absorption spectra at high pressures are found to be much smoother due to the overlaps between neighboring absorption line shapes.

Infrared absorption of HCl and HBr in solid nitrogen. Evidence for rotation in a nitrogen matrix

1967 ◽  
Vol 45 (22) ◽  
pp. 2689-2693 ◽  
Author(s):  
K. B. Harvey ◽  
H. F. Shurvell
Keyword(s):  
Liquid Helium ◽  
Infrared Absorption ◽  
Solid Nitrogen

The infrared absorption of HCl and HBr in solid nitrogen at liquid helium temperatures has been recorded. Multiplets have been observed in the region of the fundamental of each molecule. An interpretation is given, based on rotation of the HCl and HBr molecules in the nitrogen matrix.

Sign in / Sign up

Export Citation Format

Share Document