Monte Carlo calculations of free ammonia production in deoxygenated solutions of glycylglycine irradiated by X rays and 60Co gamma rays.
Detailed-history Monte Carlo computer codes were used to simulate the formation, diffusion, and chemical reaction of free-radical species within deoxygenated aqueous solutions of glycylglycine irradiated by 250-kVp X rays and by 60Co gamma rays. In one reaction, hydrated electrons react with the glycylglycine solute to produce unbound, or free, ammonia. This reaction is complete by 10(-6) s within individual electron tracks for glycylglycine concentrations greater than or equal to 0.025 M. For solute concentrations from 0.025 to 1.2 M, calculated G values of free ammonia are in excellent agreement with measured values. In addition, the computer model predicts a statistically significant difference between the G value of free ammonia produced under X irradiation and that produced under 60Co gamma irradiation.
Bolch
W E
WE
Department of Environmental Engineering Sciences, University of Florida, Gainesville 32611.
Turner
J E
JE
Yoshida
H
H
Jacobson
K B
KB
Wright
H A
HA
Hamm
R N
RN
D000641:Ammonia; D003198:Computer Simulation; D004151:Dipeptides / Q000528:radiation effects*; D005720:Gamma Rays; D006033:Glycylglycine / Q000528:radiation effects*; D009010:Monte Carlo Method; D011854:Radiochemistry; D014965:X-Rays
D004151:Dipeptides; D006033:Glycylglycine; D000641:Ammonia