三大衰变系α、β射线情况(共9页)

1、精选优质文档-倾情为你奉上表1 钍系衰变链核素名称半衰期（T1/2）衰变类型主要能量（Kev）分支比（%）232Th1.41x1010a38103948.54001.20.0682178.9228Ra5.75a12.725.639.139.5308.74912228Ac6.15h0.7.2066228Th1.91a5269.35304.15435.75520.10.2180.40826.073.4224Ra3.63d5547.95788.95.2594.73220Rn55.8s5854.96404.70.11899.882216Po0.148s6101.46906.30.001999.9981

2、212Pb10.64h154.6331.3569.94.9981.713.3212Bi60.54min（36%）5879.26167.46207.30.6125.19.7（64%）31.4739.41524.81.91.444.5208Tl3.058min1037.81290.51523.91801.33.1724.122.149.6212Po300x10-9s8954.12100208Pb稳定表2 铀系衰变链核素名称半衰期（T1/2）衰变类型主要能量（Kev）分支比（%）238U4.468x109a4106.74220.24269.70.1322.3377.54234Th24.10d8510

3、51061981.66.514.177.8234Pa299332358.122422690.00380.01080.04521.00697.599234U2.455x105 a4722.44774.628.4271.38230Th7.538x104 a4620.54687.023.4076.30226Ra1600a46014784.36.1693.84222Rn3.82d49865489.480.07899.92218Po3.098min51816002.40.00199.979214Pb26.8min48.3143.1205.5225.6334.92.751.0445.940.211.021

4、4Bi19.9min5273545255160.001220.01130.0082248.2260.9385.1424.6525.3539.41268.81.2442.784.3452.4516.9617.5719.10214Po163.6us6902.27686.820.0199.99210Tl1.3min477568674743877.116351762.6272410103020210Pb22.2a4.1616.168416210Bi5.012d389100210Po138.4d4516.585304.330.00104100206Pb表3 锕系衰变链核素名称半衰期（T1/2）衰变类型主

5、要能量（Kev）分支比（%）235U7.038x108a4215.84322.94364.34395.44414.94502.54556.14597.46.013.5218.9257.733.091.283.824.77231Th25.52h37.855.958.679.880.185.32.612.11.3124032231Pa3.276x104 a468147134736485349344951.349865013.85028.450325058.61.51.2688.41.4322.81.425.4202.511227Ac21.77 a4768479648554872.74940.749

6、53.260.0250.0140.0830.0870.5460.6585.118.9811.37103554223Fr22.0min292.5350.4361.710.115.070227Th18.68d566856935700.85708.85713.25756.875807.55866.65959.75977.76008.860382.061.503.638.34.8920.41.272.423.023.52.924.2223Ra11.43d5433.65501.65539.85606.75716.25747.05871.32.221.09.025.251.69.01.0219Rn3.96s6425.06552.66819.17.5012.979.4215Po1.781ms6589680269547386.10.0020.00160.06099.99211Pb36.1min71.3160.2313.7471.30.836.281.6391.32211Bi2.14min （99.724%）6278.26622.916.1983.54（0.276%