Bromate retention in NaBrO3NaClO3 solid solutions. A model for recombination reactions

On the Preparation of82Br-Biomolecules. A Direct Bromination via Neutron Irradiated Bromates

“…[20] found 80% formation of radiobromide from KErOa both for thermal neutron radiative capture and for the (n, 2n) reaction by 14 MeV neutrons. Similar results were obtained by OWENS and BOYD [21 ] for NaBrOs. In Table 2 are given also the labelling yields assuming 80% formation of radiobromide.…”

“…The nature of the reacting species is yet unknown but it seems very reasonable to assume that the same species react in the case of Br and I. OWENS and BOYD [21] found that in the thermal neutron Irradiation of NaBrOs, the fraction of bromine radioactivity which appeared as Br02 and BrO" was always very small, even that they are formed in 7-radiolysis [25]. Hence, it seems reasonable that the brominating species are Br", reacting via the bromide-bromate reaction.…”

Thermal Annealing of Neutron Irradiated Potassium Perbromate

“…3). In addition, since no *BrOi is detected in neutron irradiated Br Ο J [14] this fraction is viewed as genuine *BrOi formed by a single ligand loss from *BrOj on recoil, or by a higher loss followed by a fast recombination. Therefore most of the analyzed bromate is formed only on dissolution and must have in the crystal one or several precursors which on annealing transform into *BrO^ or into perbromate-begetting species.…”

“…The Szilard-Chalmers chemistry and the thermal annealing of neutron irradiated alkali bromates have been the subject of several investigations [8][9][10][11][12][13][14] and numerous reactions have been proposed. In the present context it is interesting to note that the initial retention of radiobromine in KBr0 3 is of the order of 20%, i. e. nearly the fraction *BrOj which is not liable to annealing in KBr0 4 (see Fig.…”

Hot Atom Chemistry 1976

“…Recoil atoms recombine with fragments resulting from the self-radiolysis of the oxyanions due to neutron capture 7 rays. The retention depends on the pre-and postirradiation thermal treatment of the sample [88]. An enrichment factor over 10 4 has been reported for the Szilard-Chalmers separation of radiobromine from irradiated potassium bromate [3].…”