A. Nath, S. Vaish
Jun 15, 1967
Citations
0
Influential Citations
9
Citations
Journal
Journal of Chemical Physics
Abstract
Thermally treated and untreated anhydrous samples of tris (dipyridyl) Co(III) perchlorate were ``hydrated'' at 30° in air at a relative humidity of 93%. Some of them were chilled at −78° while others were kept at 30° for a prolonged period before chilling at −78°. The chilled samples were neutron irradiated at −78°. Thermally treated samples chilled immediately after hydration exhibit a much faster rate of thermal annealing as compared to the latter and to the trihydrate. These observations have been interpreted on the basis of the ``variable‐depth‐electron‐donors—isotopic‐exchange'' model which postulates an annealing rate proportional to the free‐electron density. Evidence is presented for the creation of electron traps and electron—hole ``recombination centers'' during thermal treatment of the anhydrous form and for populating of the electron traps with electrons to form shallow donors during hydration through exo‐electron emission. Hence, in the freshly hydrated samples kept at 30° for prolonged perio...