Radiolysis Of Potassium Chromate. Effect Of Oxygen On Radiolytic Production Of 51cr(iii) From K2 51cro4

The radiolytic yield of 51Cr(III) from K2 51CrO4 irradiated in a 60Co field has been determined as a function of temperature of irradiation, of covering gas atmosphere and of sample treatment prior to irradiation. These yields are highest at intermediate temperatures (0°>20°> - 78°>100°C) and in the absence of oxygen (N2>vacuum>air>O2). Pre-heating of the samples under the corresponding atmospheres for 4 h at 350°C emphasizes these differences. The results are consistent with a model which includes the radiolytic production of a Cr(III)-precursor, with the observed yield of 51Cr(III) modified by a radiation annealing process which is more effective in the presence of an oxygen atmosphere and at higher irradiation temperatures. © 1978.113103109Green, Harbottle, Maddock, (1953) Trans. Faraday Soc., 49, p. 1413Harbottle, Maddock, (1958) J. inorg. nucl. Chem., 5, p. 249Bancroft, Dharmawardena, Maddock, (1970) Int. J. Radiat. Phys. Chem., 2, p. 45Taylor, Rogers, (1962) AERE-R-3409Shibata, Amaro, Yoshihara, Ebihara, (1969) Atompraxis, 15, p. 43Gütlich, Fröhlich, Odar, Polymere chrom(III)-komplexe als folge der neutronenbestrahlung von kristallinem kaliumchromat — II Einfluß der bestrahlungsdauer auf die spezifische aktivität und diskussion der bildungsweise der ein- und mehrkernigen rückstoßprodukte (1971) Journal of Inorganic and Nuclear Chemistry, 33, p. 621Debuyst, Apers, Capron, (1972) J. inorg. nucl. Chem., 34, p. 1541Yang, Wei, Chuang, Yeh, Collins, Collins, (1973) Radiochem. Radioanal. Lett., 13, p. 173Bjergbakke, (1970) Manual on Radiation Dosimetry, p. 323. , 2nd edn, N.W. Holm, R.J. Berry, Marcel Dekker, New YorkCollins, Collins, Yang, Ke, Lo, Yeh, (1972) J. Radioanal. Chem., 10, p. 197Ackerhalt, Collins, Collins, (1971) Trans. Faraday Soc., 67, p. 1459Ackerhalt, (1970) thesis, , State University of New York, BuffaloPodeanu, Costea, (1971) Radiochem. Radioanal. Lett., 6, p. 57Andersen, Baptista, (1971) Trans. Faraday Soc., 67, p. 1203Stamouli, (1971) thesis, , University College, CambridgeBaumgärtner, Maddock, Chemical effects of radiation thermal neutron capture. Part 14.?Annealing by ionizing radiation (1968) Transactions of the Faraday Society, 63, p. 714D.H. Lister and M.C.R. Symons, J. Chem. Soc. A1970, 782Debuyst, Ladriere, Apers, (1972) J. inorg. nucl. Chem., 34, p. 3607Constantinescu, Pascaru, Constantinescu, (1968) Rev. Roum. Phys., 13, p. 607Johnson, (1970) The Radiation-induced Decomposition of Inorganic Molecular Ions, , Gordon & Breach Science, New YorkCunningham, (1968) Radical Ions, p. 475. , E.T. Kaiser, L. Kevan, Interscience, New YorkLadov, Johnson, (1969) J. Am. chem. Soc., 91, p. 760