Kinetics of spur reactions of electrons in ethylene glycol-water glassy ice, a pulse radiolytic study

Journal Article · Sat Nov 01 04:00:00 EST 1975 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100591a004· OSTI ID:4142706

Barkatt, Aaron; Rabani, Joseph

Ethylene glycol--water glasses were pulse irradiated at 173$sup 0$K. It was found that Cd$sup 2+$ ions react with both trapped electrons (e$sup -$/sub t/ , k = (2.5 +- 1) x 10$sup 5$ M$sup -1$ sec$sup -1$) and with their precursors (k greater than 10$sup 9$ M$sup -1$ sec$sup -1$). Cd$sup 2+$ ions which react with e$sup -$/sub t/ produce Cd$sup +$ ions in the bulk of the glasses. This is demonstrated by the subsequent second-order decay of Cd$sup +$. Cd$sup 2+$ ions which react with the precursors of e$sup -$/sub t/ produce Cd$sup +$ ions in the spurs. Such Cd$sup +$ ions decay away later by a process which is in agreement with the model of Schuler and coworkers. The fraction of Cd$sup +$ ions which is produced in the spurs increases with [Cd$sup 2+$] in accordance with the competition scheme e$sup -$/sub m/ $Yields$ e$sup -$/sub t/, Cd$sup 2+$ + e$sup - $/sub m/ $Yields$ Cd$sup +$ where e$sup -$/sub m/ represents a precursor of e$sup -$/sub t/. From the effect of [Cd$sup 2+$] on the initial e$sup -$/sub t/ and Cd$sup +$ absorptions, it was found that k(e$sup -$/sub m/ $Yields$ e$sup -$/sub t/)/k(Cd$sup 2+$ + e$sup -$/sub m/) = (0.24 +- 0.02) M. Results are also reported for the recombination of Cd$sup +$ and the molar absorptivities of Cd$sup +$ and similar cations in aqueous solution. (auth)

• Research Organization: Hebrew Univ., Jerusalem
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-008918
• OSTI ID: 4142706
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 24 Vol. 79; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

*GLYCOLS-- RADIOLYSIS
*WATER-- RADIOLYSIS
400600* --Chemistry--Radiation Chemistry
CADMIUM COMPOUNDS
CATIONS
DECAY
ELECTRON BEAMS
ICE
LOW TEMPERATURE
N40300* --Chemistry--Radiation Chemistry
PULSED IRRADIATION
TRAPPED ELECTRONS