CONCENTRATION OF SILICON ISOTOPES Si$sup 29$ AND Si$sup 30$ THROUGH DISTILLATION OF METHYLSILANE

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Nachr. Akad. Wiss. Goettingen, II, Math.-Physik. Kl.

OSTI ID:4727269

Brunken, R; Jost, W

An experimental investigation was made of the separation of Si/sup 29/ and Si/sup 30/ by the distillation of CH/sub 3/SiH/sub 3/. A separation column filled with wire spirals and having an effective separation length of 1 meter was used. The CH/sub 3/SiH/sub 3/ samples taken for isotopic determinations were converted to SiF/sub 4/ prior to mass spectrometric measurements. The data are plotted on a concentration ratio vs time graph, for ratios between head and bubble, head and natural occurrence, and bubble and natural occurrence, and it is seen that the heavier isotope Si/sup 30/ is enriched in the gas phase. The concentration ratio between head and bubbles after nearly 10 days is 1.025 for Si/ sup 30/ and 1.013 for Si/sup 29/ for a reflux rate of 60. From the estimated value of 50 theoretical plates for the column efficiency, a separation factor of 1.0007 for Si/sup 30/ and 1.00035 for Si/sup 29/ is obtained. (D.L.C.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-022073
• OSTI ID: 4727269
• Journal Information: Nachr. Akad. Wiss. Goettingen, II, Math.-Physik. Kl., Journal Name: Nachr. Akad. Wiss. Goettingen, II, Math.-Physik. Kl. Vol. Vol: No. 4
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

DISTILLATION
EFFICIENCY
ENRICHMENT
ISOTOPE SEPARATION
MASS SPECTROMETERS
MEASURED VALUES
SILANES
SILICON 29
SILICON 30
SILICON FLUORIDES