PRODUCTION OF RADIOISOTOPES IN HIGH SPECIFIC ACTIVITIES. PREPARATION OF $sup 51$Cr IN A HIGH SPECIFIC ACTIVITY BY THE USE OF POTASSIUM CHROMATE

Journal Article · Tue Jan 01 00:00:00 EST 1963 · Proc. Japan Conf. Radioisotopes

OSTI ID:4698033

Shibata, N; Yoshihara, K; Tanaka, K; Nakamura, H; Arai, M

Attempts were made to improve the filtration and leaching methods for the preparation of Cr/sup 51/. The separation of (Cr/sup 51/)/sup 3+/ from target chromate was examined by filtration in an alkaline solution. Various filters were investigated. The most favorable results were obtained by the use of filter paper Toyo, No. 5c, which gave good results in a 0.05 to 0.1N NH/sub 4/ OH solution. A constant yield of Cr/sup 51/ was observed by exposing the solution of irradiated chromate for 1 hr to 6 days at room temperature. This method is suitable for treatment of relatively small quantities of the target. The separation of Cr/sup 51/ from target chromate by coprecipitation with La(OH)/ sub 3/ followed by leaching with a NaOH + Na/sub 2/O/sub 2/ solution was also examined. The collection of Cr/sub 51/ in a trivalent state by La(OH)/sub 3/ was proved to be of high efficiency. The use of 4 to 6% Na/sub 2/O/sub 2/ gave good results. This method is suitable for treatment of large quantities of target chromate. (P.C.H.)

• Research Organization: Japan Atomic Energy Research Inst.
• NSA Number: NSA-17-030166
• OSTI ID: 4698033
• Journal Information: Proc. Japan Conf. Radioisotopes, Vol. Vol: 5th, No. 4; Other Information: Orig. Receipt Date: 31-DEC-63
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

GENERAL AND MISCELLANEOUS
ALKALINE EARTH METALS
AMMONIA
ANIONS
CHEMICAL REACTIONS
CHROMATES
CHROMIUM 51
CHROMIUM OXIDES
EFFICIENCY
FILTERS
IRRADIATION
LANTHANUM HYDROXIDES
LEACHING
PAPER
POTASSIUM COMPOUNDS
PRECIPITATION
PREPARATION
PRODUCTION
RADIOACTIVITY
RADIOISOTOPES
SODIUM HYDROXIDES
SODIUM OXIDES
SOLUTIONS
TARGETS