≠
zr 1.5
中子 3% -235 90% -235
-131 -137 铯 -90 锶 -139 钚 a βr a r x
-131 -131 8.3 3
-137 -131 30
-90 29.1 -90
-139
10
1. 1957 10 10 120
2. 1966 1 15 B-52 KC -135 3100 4 2 3000 3 4 7
3. 1968 1 21 B-52
4. 1970 12 18 900 300 居里 8000
5. 1979 3 28 2 47%
6. 1985 8 10 K-431 10 49
7. 1986 4 28 4 8 30
8. 1978 9 13 -137 -137 14 4
9. 1993 4 6 -7 -7
10. 1999 9 30 jco 18.8% 16 2.9 r 350 10
2011 1 442 16% 65
104 58 54 32 21 20 19 18 17 15 13
60 2030 300
4
38 1954
242 17
1990 2004 17% 4%
21
1985 3 1991 6 30
13
13 30 90