THE SZILARD-CHALMERS PROCESS OF COMPLEX-ION ON ION-EXCHANGER (in Japanese)
Journal Article
·
· Proc. Japan Conf. Radioisotopes
OSTI ID:4708139
Cation-exchange resins of hexamminecobaltic(III) and trisethylendiaminecobaltic(III) ion forms were irradiated in the reactor, using ammonium citrate solution (pH 5.6) as eluent for radioactive aquocobaltous ion. The experiments were done both by batch and column methods. In the batch method, it was found that retention depends on the target ion form, time of irradation, time elapsed after irradiation, and neutron flux. In the ethylendiaminecobaltic system, the retention (60% approximates 90%) was found to be much larger than in the hexamminecobaltic one (15% approximates 80%), in parallel with their stability constants. If the resin is diluted with hydrogen form of the resin, the retention is markedly lowered (2% approximates less than 0.1%), and decreases further with time. The maximum specific activity of the eluant reached 5 mu C/mg for the samples irradiated for 5 min (thermal flux is about 1.2 x 10/ sup 12/ n/sec/cm/sup 2/, Cd ratio about 2.5); the corresponding enrichment factor was about 220. The column method was performed in several runs mostly in the central thimble of the reactor (thermal flux about 4 x 10/sup 12/ n/sec/ cm/sup 2/ , Cd ratio 2.5). As expected, the retention was found to be considerable below 1% for the hexammine system). However, the specific activity did not exceed a few microcurie per milligram. This means that about one million inactive cobalt ions per one radioactive one are produced in the eluant. It is supposed that gamma radiation or the fast neutron component in the reactor are responsible for this effect. (P.C.H.)
- Research Organization:
- Rikkyo Univ., Yokosuka, Japan
- NSA Number:
- NSA-17-030168
- OSTI ID:
- 4708139
- Journal Information:
- Proc. Japan Conf. Radioisotopes, Journal Name: Proc. Japan Conf. Radioisotopes Vol. Vol: 5th, No. 4
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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