Publication

Infrared vibrational predissociation spectroscopy of sulfur hexafluoride-argon ((SF6)mArn) clusters: implications for effective laser isotope separation

Hubert van den Bergh
1985
Journal Articles

Abstract

Selective IR vibrational predissocn. (IRVP) of van der Waals clusters in a free jet is an effective way to sep. isotopes. Abs. sepn. factors a in excess of 1.1 were obsd. upon irradn. of a beam of SF6 dild. in Ar with a 20 W CO2 laser. Selection of the wavelength permits enrichment or depletion of any one of the S isotopes in the mixt. To understand the obsd. wavelength dependence of the isotope enrichment the effective IRVP spectra were measured of the individual van der Waals clusters (SF6)mArn with 1 ? m ? 3 and n ? 9. A systematic study of these spectra reveals a significant red-shift which occurs upon attaching Ar atoms to (SF6)m. Such shifts can attain as much as 10 cm-1, as in the case between SF6 and SF6.Ar9.

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https://infoscience.epfl.ch/entities/publication/5d1a7b92-fad9-4271-a76c-cc1cf2368af1

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Hubert van den Bergh
1985
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5d1a7b92-fad9-4271-a76c-cc1cf2368af1

About this result

Related concepts (32)

Isotope separation

Isotope separation is the process of concentrating specific isotopes of a chemical element by removing other isotopes. The use of the nuclides produced is varied. The largest variety is used in research (e.g. in chemistry where atoms of "marker" nuclide are used to figure out reaction mechanisms). By tonnage, separating natural uranium into enriched uranium and depleted uranium is the largest application. In the following text, mainly uranium enrichment is considered.

Enriched uranium

Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235U) has been increased through the process of isotope separation. Naturally occurring uranium is composed of three major isotopes: uranium-238 (238U with 99.2739–99.2752% natural abundance), uranium-235 (235U, 0.7198–0.7202%), and uranium-234 (234U, 0.0050–0.0059%). 235U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons.

Isotopic labeling

Isotopic labeling (or isotopic labelling) is a technique used to track the passage of an isotope (an atom with a detectable variation in neutron count) through a reaction, metabolic pathway, or cell. The reactant is 'labeled' by replacing specific atoms by their isotope. The reactant is then allowed to undergo the reaction. The position of the isotopes in the products is measured to determine the sequence the isotopic atom followed in the reaction or the cell's metabolic pathway.

Related publications (2)

Infrared vibrational predissociation spectroscopy of sulfur hexafluoride-argon ((SF6)mArn) clusters: implications for effective laser isotope separation

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