The Production of Concentrated Carbon (13) by Thermal Diffusion

Abstract
A thermal diffusion column 74 feet long and employing methane is being used for the concentration of C13. Every 48 hours 308 milligrams of methane are removed in which the C13/C12 ratio has been increased 11.5 times. The power consumption is 6490 watts and six liters/minute of cooling water is used. An expenditure of 156 kw‐hr. of energy thus results in a transport of 13.5 mg of C13 per 24 hours. The measured output is in good agreement with the value computed from the theory.