A study on the radical species formed during the polycrystalline solid state radiolysis of the potassium and barium bichromates

Authors
Constantinescu, M Constantinescu, O Contineanu, M
Citation
M. Constantinescu et al., A study on the radical species formed during the polycrystalline solid state radiolysis of the potassium and barium bichromates, REV CHIM, 52(9), 2001, pp. 478-484
Citations number
17
Categorie Soggetti
Chemical Engineering
Journal title
REVISTA DE CHIMIE
ISSN journal
00347752 → ACNP
Volume
52
Issue
9
Year of publication
2001
Pages
478 - 484
Database
ISI
SICI code
0034-7752(200109)52:9<478:ASOTRS>2.0.ZU;2-5
Abstract
An EPR study, of the paramagnetic centers formed by irradiation of polycrys talline K2Cr2O7 and BaCr2O7 was made, In the EPR spectra of the gamma irrad iated powder samples, at room temperature, the presence of three types of p aramagnetic centers iv as observed. According to their EPR parameters and t hermal behaviour. these centers were attributed to the Cr(O)over dot(4)(3-) , Cr-2(O)over dot(7)(3-) and Cr(O)over dot(3)(-) radicals respectively,. An adequate mechanism radiolysis has been established.