H atom probes of radiation chemistry: Solids and liquids

Technical Report · Thu Dec 31 04:00:00 EST 1998

DOI:https://doi.org/10.2172/563174· OSTI ID:563174

Trifunac, A D; Shkrob, I A ^[1]

---

1. Argonne National Lab., IL (United States). Chemistry Div.

H atoms are ubiquitous in radiation chemistry. Radiolysis of most substances yield H atoms and studies of the mechanisms of their production are as old as the field of radiation chemistry. The problem is that study or products does not easily reveal the chemical mechanisms involved even with the clever use of isotopes. Time-resolved pulsed electron paramagnetic resonance (EPR) was used to study formation and decay kinetics of spin-polarized mobile H atoms in radiolysis of wet fused silica containing {approximately} 1,200 ppm of SiOH groups. Two reactions of H atoms can be distinguished: a slow component corresponding to scavenging of H atoms by metastable paramagnetic centers and a fast component which is ascribed to a reaction of a short-lived small polaron (intrinsic hole) with H atoms.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 563174
• Report Number(s): ANL/CHM/CP--94299; CONF-980122--; ON: DE97054139
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
HYDROGEN
KINETICS
POLARONS
RADIATION CHEMISTRY
RADIOLYSIS
SILICON OXIDES
SYNTHESIS