摘要
本文在广元市环境天然放射性水平调查的基础 上，通过对全市范围道路贯穿辐射剂量水平进行分析和研究，得出：（１）道路陆地γ辐射剂 量率为（６．４３±１．２１）×１０－８Ｇｙｈ－１；（２）道路贯穿辐射剂量率为（９．６６±１．３ ５）×１０－８Ｇｙｈ－１；（３）道路γ辐射剂量水平与道路贯穿辐射剂量水平的地理分布 相似。即：北部中山区最高，东南低山区和东部次之，中部河谷平坝区和西南低山区最低。 （４）依不同路面材料，其道路陆地γ辐射剂量率的排列顺序为：泥土路＞碎石路＞砖路＞柏 油路＞水泥路。
Based on the investigation of the environmental na tural radioactivity level the road penetrating radiation dosage level covering t he whole city were analyzed and studied．The results show:(1)The road land γ ra dia tion dosage rate is(6．43±1．21)×10-8 Gyh-1 ；(2)The road penetratin g radiation dosage rate is(9．66±1．35)×10-8 Gyh-1 ；(3)The geograph y distribution of the road γ radiation dosage is similar, i．e:the middle moun tain area in the North is highest,the low mountain area in the Southeast and the East are the second．The river valley and flat land area in the Southwest is lo west．(4)The land γ radiation dosage rate of different road pavement is in sequ ence:clay road＞macadam road＞brick road＞tar road＞cement road．
出处
《四川环境》
2002年第1期84-87,共4页
Sichuan Environment
