Orientational behavior of solid nitrogen at high pressures investigated by vibrational Raman spectroscopy

1996 ◽  
Vol 105 (7) ◽  
pp. 2553-2560 ◽  
Author(s):  
M. I. M. Scheerboom ◽  
J. A. Schouten
Keyword(s):  
Raman Spectroscopy ◽  
High Pressures ◽  
Solid Nitrogen ◽  
Orientational Behavior

The Fluorescence of Diamond and Raman Spectroscopy at High Pressures Using a New Design of Diamond Anvil Cell

1973 ◽  
Vol 27 (5) ◽  
pp. 377-381 ◽  
Author(s):  
D. M. Adams ◽  
S. J. Payne ◽  
K. Martin
Keyword(s):  
Raman Spectroscopy ◽  
Diamond Anvil Cell ◽  
High Pressures ◽  
Fluorescence Emission ◽  
Type I ◽  
High Pressure Cell ◽  
Scattering Geometry ◽  
Infrared And Raman Spectroscopy ◽  
Bond Stretching ◽  
Diamond Anvil

A new design of diamond anvil high pressure cell suitable for use in infrared and Raman spectroscopy is described. Its performance is demonstrated with particular reference to the pressure dependence of the infrared spectrum of K2PtCl6 and the Raman spectrum of W(CO)6. In contrast to earlier reports, in which forward scattering geometry was used, this design of cell is shown to be very suitable for Raman use in the 180° excitation mode. However, severe limitations are imposed by the fluorescence emission of diamond and of sapphire. Conditions under which the cell can be used for Raman work are summarized. New fluorescence and Raman features are reported for diamond. In particular, a band at 1730 cm−1 is characteristic of type I stones and may be due to C to N bond stretching at defect centers.

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

Spectroscopy at High Pressures—Status Report and Update of Instrumental Techniques

1974 ◽  
Vol 28 (6) ◽  
pp. 505-516 ◽  
Author(s):  
John R. Ferraro ◽  
Louis J. Basile
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
High Pressures ◽  
Status Report ◽  
Future Outlook ◽  
Optical Link ◽  
Interferometric Technique ◽  
Pressure Calibration ◽  
Calibration Methods ◽  
Optical Pressure

A status report and update of the instrumentation necessary to obtain spectra of molecules at high pressures are presented. The optical pressure cells used, the spectrophotometer needed to obtain the spectra, the optical link between the two, high pressure spectroscopic windows, pressure calibration methods, and future outlook of the technique will be determined. The use of the high pressure cells with the interferometric technique and for Raman spectroscopy is outlined.

A Study for N2 Coherent Anti-Stokes Raman Spectroscopy Thermometry at High Pressure

1983 ◽  
Vol 37 (6) ◽  
pp. 508-512 ◽  
Author(s):  
Haruhiko Kataoka ◽  
Shiro Maeda ◽  
Chiaki Hirose ◽  
Koichi Kajiyama
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
Pressure Range ◽  
High Pressures ◽  
Band Width ◽  
Maximum Height ◽  
Temperature Determination ◽  
Engine Cylinder ◽  
Anti Stokes

N2 coherent anti-Stokes Raman spectroscopy (CARS) thermometry over a pressure range 1 to 50 atm has been studied. The CARS profile at high pressure and high temperature was recorded by using the ignition inside a running engine cylinder. The observed Q-branch profile was theoretically fitted by incorporating the collisional narrowing effect, serving for the temperature determination at various pressures. Because of the narrowing effect, the apparent band width showed little change with pressure above 5 atm in general. It has been suggested that the band width at 1/5 of the maximum height can be a useful measure of temperature, while the usual half-width turns out to be hardly practicable at high pressures.

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