Photolytic Separation of Isotopes in Cryogenic Solution

Spectrochimrco Ac;a, Vol Pnnkd I” Gnat Llntaln

os84-8547/?6

416. No. 6, pp. t-iii.1986.

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4341470 ATOMIC ABSORPTION SPECTROSCOPY Clive Parker, Antony Pearl, Mount Waverfy, Australia assigned to Varian Associates Inc A method and apparatus for carrying out atomic spectroscopy, and particularly atomic absorption and atomic fluorescence spectroscopy. The method involves passing the emission spectrum of a light source through an atomized sample, changing the relationship between a selected emission line of the emission spectrum and a corresponding absorption line of the atoms of interest and measuring the absorption of that emission line by the sample before and after the aforementioned change in relationship. The change in emission and absorption line relationship can be effected by application of the Zeeman Effect, Stark Effect, or Doppler Effect. The apparatus, in one form, includes an electromagnet operative to apply a magnetic field to the atomized sample and thereby cause splitting and shifting of the aforementioned absorption line, and the magnet is modulated to effect periodic variation of the spectral line relationship.

and argon with 206 nm light from an iodine resonance lamp is reported. The spectral distribution of the ultraviolet absorption depends on solvent. Thus, in liquid nitrogen the photolytic decomposition rate of 13CS2 is greater than’that of 12CS2 (because the absorption of 206 nm radiation is greater for 13CS2), whereas in liquid krypton and liquid argon the reverse is true. The shift in ultraviolet spectrum is a general phenomenon readily characterized as a function of solvent polarizability, and exhibits behavior similar to that for vibrational transitions occurring in the infrared.

4555176 METHOD AND APPARATUS FOR DETERMINING PRESSUREINDUCED FREQUENCY-SHINS IN SHOCK-COMPRESSED MATERIALS

4554060 PHOTOLYTIC SEPARATION OF ISOTOPES IN CRYOGENIC SOLUTION

David S Moore, Stephen C Schmidt assigned to The United States of America as ,represented by the United States Department of Energy

Samuel Freund, William B Maier, Redus F Holland, Willard H Beattie assigned to The United States of America as represented by the United States Department of Energy

A method and an apparatus for cgnducting coherent anti-Stokes Raman scattering spectroscopy in shock-compressed materials are disclosed. The apparatus includes a sample vessel

Separation of carbon isotopes by photolysis of (752 in cryogenic solutions of nitrogen, krypton i