| Autor: |
Yurik, T., Zubareva, M., Barsova, L. |
| Zdroj: |
Bulletin of the Academy of Sciences of The USSR, Division of Chemical Science; 1989, Vol. 38 Issue 10, p1996-2001, 6p |
| Abstrakt: |
The formation and stabilization of hole and electron centers at 77 K in γ-irradiated polycrystalline samples of Ba(OH)·HO, where x=7.4, 1, and O are studied. Several types of O radical ions with different short-range order, electronic centers of the F-center type, and hydrogen atoms are shown to be stabilized upon radiolysis of barium hydroxide crystal hydrates. The radiation-chemical yields of 0' radical ions increase and the yields of F-centers decrease with increasing content of water of crystallization. Narrow singlets with g=2.019 and ΔH=0.45 mT in the EPR spectrum of all samples appear with small radiation doses. These are thermally unstable (τ=60 sec at 77 K). The annealing curves are linear in semilogarithmic coordinates. They are suggested to belong to clusters of the type Ba. A possible mechanism of radiolysis of barium hydroxide crystal hydrates is proposed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
