常用密封放射源分类情况表.doc

常用密封放射源分类情况表核素放射性活度/Bq核素名称1类源（Bq）2类源（Bq）3类源（Bq）4类源（Bq）5类源（Bq）Am-241≥61013≥61011≥61010≥6108≥1104Am-241/Be≥61013≥61011≥61010≥6108—Au-198≥21014≥21012≥21011≥2109≥1106Cd-109≥21016≥21014≥21013≥21011≥1106Cf-252≥21013≥21011≥21010≥2108≥1104Cm-244≥51013≥51011≥51010≥5108≥1104Co-57≥71014≥71012≥71011≥7109≥1106Co-60≥31013≥31011≥31010≥3108≥1105Cs-137≥11014≥11012≥11011≥1109≥1104续表Fe-55≥81017≥81015≥81014≥81012≥1106Gd-153≥11015≥11013≥11012≥11010≥1107Ge-68≥71014≥71012≥71011≥7109—H-3≥21018≥21016≥21015≥21013≥1109I-125≥21014≥21012≥21011≥2109≥1106I-131≥21014≥21012≥21011≥2109≥1106Ir-192≥81013≥81011≥81010≥8108≥1104Kr-85≥31016≥31014≥31013≥31011≥1104Mo-99≥31014≥31012≥31011≥3109≥1106Ni-63≥61016≥61014≥61013≥61011≥1108P-32≥11016≥11014≥11013≥11011≥1105Pd-103≥91016≥91014≥91013≥91011≥1108Pm-147≥41016≥41014≥41013≥41011≥1107Po-210≥61014≥61011≥61010≥6108≥1104Pu-238≥61013≥61011≥61010≥6108≥1104Pu-239d/Be≥61013≥61011≥61010≥6108—Ra-226≥41013≥41011≥41010≥4108≥1104Ru-106(Rh-106)≥31014≥31012≥31011≥3109≥1105Se-75≥21014≥21012≥21011≥2109≥1106Sr-90(Y-90)≥11015≥11013≥11012≥11010≥1104Tc-99m≥71014≥71012≥71011≥7109≥1107Tl-204≥21016≥21013≥21013≥21011≥1104Tm-170≥21016≥21014≥21013≥21011≥1106Yb-169≥31014≥31012≥31011≥3109≥1107注：放射性活度单位换算关系为 1Ci＝3.71010Bq；1Bq＝10-3kBq＝10-6MBq＝10-9GBq＝10-12TBq。