COMMISSION ON MOLECULAR STRUCTURE AND SPECTROSCOPY (I.5)
Title: Spectroscopy under extreme conditions
of temperature and pressure
Remarks: Collaboration with Commission V.4,
Max Planck Institute (Stuttgart) and AIRAPTS organisers of Conference
series on High Pressure Science
To obtain international agreement on methods and standards and to
prepare documents to guide workers in the field of spectroscopy under
extreme conditions. Initially vibrational and electronic spectroscopy
will be considered, but the project may be extended to NMR, Mossbauer,
and other spectroscopies if the early work reveals interest in these
areas. The main issues to be pursued come under the three general
headings Instrumentation, Pressure Calibration, and Temperature Calibration.
Instrumentation includes the consideration of cell design, the use
of membranes with diamond anvil cells, the properties of optical windows
under extreme conditions, the design of spectrometers and microscopes,
the use of optical fibers for safe access to difficult experimental
situations, and the simultaneous generation of high pressure and low
temperature in an optical cell. The calibration issues include methods
and standards for the calibration of hydrostatic and very non-hydrostatic
pressures. Emphasis will be on calibration through the spectroscopic
properties, with the intention to make recommendations in the final
report of standard substances, inorganic, organic and biological,
whose spectroscopic properties can be used for calibration and for
establishing the performance of apparatus.
Much progress has been made on this project. A 6-page summary was
presented to the Commission in Berlin, accompanied by a detailed report
on the scope of the project.
The final report is submitted for publication in PAC.
Last update: 25 Janaury 2002