Separation research
- ed.
A total reflux operation was achieved in a prototype chemical exchange system for enrichment of calcium isotopes using a Karr reciprocating-plate counter current extraction column. Sulfur 34 (natural abundance, 4.2 percent) was enriched to a concentration greater than 90 percent in a 12-column liquid thermal diffusion system. Carbon disulfide is used as the working fluid. A computer program was developed to calculate the transient performance of the dual cascade system. Total scattering cross sections for the argon-krypton scattering pair were measured. Tests are being conducted on the quadrupole detector, and performance has been improved considerably by replacing the rotating chopper wheel with a tuning fork chopper. Quantum mechanical calculations for the thermal diffusion factor of an equimolar $sup 3$He--$sup 4$He mixture are presented for a new hybrid Morse-V/sub DD/ potential by Bruch and McGee and also for a potential derived from molecular beam scattering results. Neither of these potentials represents the 2 to 5$sup 0$K experimental results as well as the original hybrid Morse-V/sub DD/ potential by Bruch and McGee. Theoretical values of the thermal diffusion factor for $sup 124$Xe--$sup 136$Xe were computed using a new xenon potential proposed by Barker and co-workers. These values agree with the experimentally determined values of $alpha$/sub T/ for xenon better than values obtained with any other potential investigated. Also, this potential can be used to predict many other physical properties of xenon. (auth)
- Research Organization:
- Mound Lab., Miamisburg, Ohio (USA)
- NSA Number:
- NSA-33-008893
- OSTI ID:
- 4132835
- Report Number(s):
- MLM-2241
- Resource Relation:
- Other Information: Orig. Receipt Date: 30-JUN-76; Related Information: Mound Laboratory activities for the Division of Physical Research. Progress report, January--June 1975
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Organic
& Physical Chemistry-Isotope Exchange & Isotope Separation
400203* -Chemistry-Inorganic & Physical Chemistry-Isotope Exchange & Isotope Separation
*HELIUM 3- THERMAL DIFFUSION
*HELIUM 4- THERMAL DIFFUSION
*MOLECULAR BEAMS- SCATTERING
*SULFUR 34- ISOTOPE SEPARATION
*SULFUR ISOTOPES- THERMAL DIFFUSION
*XENON 124- THERMAL DIFFUSION
*XENON 136- THERMAL DIFFUSION
ARGON
CALCIUM ISOTOPES
CARBON SULFIDES
COMPUTER CODES
KRYPTON