On Wed, Dec 7, 2011 at 12:52 AM, Peter Gluck <[email protected]> wrote: > OK, dear Berke- can you suggest how it is done, provided that it > does not multiply the cost of Ni. How can Rossi do this enrichment > in practice? Please give some literature.
I'm gonna quote Jones Beene's Nov. 4th message on this list: > If you are going for enriching an isotope that is 10% denser, it > will take at least seven stages for every doubling (not counting > losses). This is the "rule of seventy" (similar to formula used in > compound interest). Therefore, to increase a 1% isotope to 16% might > require a minimum of 28 stages of progressive enrichment, but when > losses are included, it is probably closer to 50 stages. Automation > makes a big difference with this many stages. > For the NiCl solution (hexa-hydrate) the solubility is 254 g/100 mL > at 20 °C - and 600 g/100 mL at 100 °C. That difference could help a > lot in automating the processing, so that even 50 stages in a > continuous centrifuging would not be a insurmountable problem to get > 64Ni enriched to a level in the mid-teens at an affordable cost. Peter Gluck <[email protected]> wrote: > By the way I have retired in 1999 from an > Institute http://www.itim-cj.ro/ specialized in isotopes. Well if that's the case, I assume you are familiar with, or know people familiar with isotope enrichment. Could you then estimate the cost for enriching the heavier isotopes using known methods? Note that we don't know how much enrichment is needed, but we cannot rule out the possibility that raising the Ni-64 fraction by a couple percentage points would not be sufficient. -- Berke Durak
