Chemical effects of nuclear transformations in mixed crystals. 10. Chemical effects of the /sup 37/Cl(n,. gamma. )/sup 38/Cl nuclear reaction in K/sub 2/OsCl/sub 6/-K/sub 2/OsBr/sub 6/ mixed crystals

Journal Article · Thu Jul 17 00:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100406a023· OSTI ID:5658011

Mueller, H; Obergfell, P; Hagenlocher, I

The solid-state reactions occurring during the moderation of recoiling /sup 38/Cl, produced by the (n,..gamma..) reaction, have been studied in K/sub 2/OsCl/sub 6/-K/sub 2/OsBr/sub 6/ mixed crystals. The main products are Os/sup 38/ClCl/sub 5//sup 2 -/, Os/sup 38/ClBr/sub 5//sup 2 -/, and /sup 38/Cl/sup -/, but even the more intimately mixed species Os/sup 38/ClCl/sub n/Br/sub 5-n//sup 2 -/ (n = 1, ..., 4) are obtained in significant amounts. The most important reaction found is the replacement process (billiard-ball process). In some cases the recoil atom interacts with more than one ligand and intermediate ligand vacancy (denoted by square) species Os/sup 38/ClCl/sub n/square/sub 5-n//sup 2 -/ and Os/sup 38/ClBr/sub n/square/sub 5-n//sup 2 -/ (n = O, ..., 4) are formed. The vacancies are assumed to be filled by mobile halides from the lattice. From the products Os/sup 38/ClCl/sub n/Br/sub 5-n//sup 2 -/ (n = O, ..., 5) and /sup 38/Cl/sup -/ and their yield dependence on the mixed crystal composition the following results were obtained with the help of the program PRIMULA: interstitials 11%, primary retention 5%, replacement 62%, replacement plus one additional vacancy 14%, replacement plus two or more additional vacancies 7%. These results together with some experiments with K/sub 2/ReCl/sub 6/-K/sub 2/ReBr/sub 6/ targets are in accordance with all other so far known /sup 36/Cl and /sup 82/Br recoil reactions in K/sub 2/M'Cl/sub 6/-K/sub 2/M''Br/sub 6/ mixed crystals. They do not confirm the reported ligand vacancy transfer mechanism (kinetic theory) elaborated for /sup 38/Cl recoil atoms.

• Research Organization: Univ. of Freiburg, West Germany
• OSTI ID: 5658011
• Journal Information: J. Phys. Chem.; (United States), Vol. 90:15
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
BROMIDES
CRYSTAL STRUCTURE
CHLORINE 38
HOT ATOM CHEMISTRY
OSMIUM CHLORIDES
OSMIUM COMPOUNDS
POTASSIUM COMPLEXES
CHLORINE 37
EXPERIMENTAL DATA
INTERSTITIALS
NEUTRON REACTIONS
RADIATION EFFECTS
VACANCIES
ALKALI METAL COMPLEXES
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BROMINE COMPOUNDS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
CHLORINE ISOTOPES
COMPLEXES
CRYSTAL DEFECTS
DATA
HADRON REACTIONS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LIGHT NUCLEI
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
POINT DEFECTS
RADIOCHEMISTRY
RADIOISOTOPES
REFRACTORY METAL COMPOUNDS
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
TRANSITION ELEMENT COMPOUNDS
400701* - Radiochemistry & Nuclear Chemistry- Hot-Atom Chemistry