MONTE-CARLO CALCULATIONS OF FREE AMMONIA PRODUCTION IN DEOXYGENATED SOLUTIONS OF GLYCYLGLYCINE IRRADIATED BY X-RAYS AND CO-60 GAMMA-RAYS

被引：11
|
作者：
BOLCH, WE
TURNER, JE
YOSHIDA, H
JACOBSON, KB
WRIGHT, HA
HAMM, RN
机构：
[1] UNIV FLORIDA,DEPT ENVIRONM ENGN SCI,GAINESVILLE,FL 32611
[2] OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831
[3] OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831
来源：
RADIATION RESEARCH | 1990年 / 121卷 / 03期
关键词：
D O I：
10.2307/3577773
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 γ 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 ≥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 γ irradiation.
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页码：248 / 256
页数：9
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