三大衰变系α、β射线情况

1、表1社系衰变链核素名称半衰期（Tl/2）衰变类型士要也里（Kev）分支比（%38100.068232Th1.41x1010aa3948.5214001.278.912.730228Ra5.75aB25.639.18.74939.512228AC6.15hB0.720665269.30.218228Th1.91aa5304.15435.70.40826.05520.173.4224cRa3.63da5547.95788.95.2594.73220-Rn55.8sa5854.96404.70.11899.882216APo0.148sa6101.46906.30.001999.9981212Pb1

2、0.64h154.6331.3569.94.9981.713.35879.20.61a(36%6167.425.1212Bi60.54min6207.39.731.41.964%739.41.441524.84.51037.83.172。8T3.058min1290.51523.924.122.11801.349.6212Po300X10-9Sa8954.12100208Pb稳定表2铀系衰变链核素名称半衰期（T1/2）衰变类型主要闫育绵：（Kev）分支比（%4106.70.13238U4.468x109aa4220.222.334269.777.54851.6234Th24.10dB1056.

3、510614.119877.82990.00383320.0108234Pa3580.045212241.006226997.5994722.428.42234U2.455x105aa4774.671.3823044620.523.40Th7.538x10aa4687.076.3046016.16226cRa1600aa4784.393.8449860.078222cRn3.82da5489.4899.9251810.001218cPo3.098mina6002.499.97948.32.75143.11.04214_Pb26.8min205.545.9225.640.2334.911.052

4、730.00122a54520.011355160.0082248.21.244214260.92.78Bi19.9min385.14.345B424.62.45525.316.96539.417.571268.819.10214Po163.6usa6902.20.017686.8299.994772568767424210ti1.3min74310877.1101635301762.6204.1684210Pb22.2a16.1616210Bi5.012dB3891004516.580.00104210Po138.4da5304.33100206fPb表3钢系衰变链核素名称半衰期（T1/2）

5、衰变类型主要闫育绵：（Kev）分支比（4215.86.014322.93.524364.318.92235u7.038x108aa4395.457.734414.93.094502.51.284556.13.824597.44.7737.82.655.912.158.61.3231Th25.52h79.81280.14085.33246811.547131.26847368.448531.449343231Pa3.276x104aa4951.322.849861.45013.825.45028.42050322.55058.61147680.025227AC21.77aa47960.01448

6、550.0834872.74940.74953.260.0870.5460.6585.118.9811.37103554223lFr22.0min292.5350.4361.710.115.070227_Th18.68da566856935700.85708.85713.25756.875807.55866.65959.75977.76008.860382.061.503.638.34.8920.41.272.423.023.52.924.25433.62.225501.61.05539.89.0223Ra11.43da5606.725.25716.251.65747.09.05871.31.06425.07.50219厂Rn3.96sa6552.612.96819.179.465890.00268020.0016215-Po1.781msa69540.0607386.199.9971.30.83160.26.28211_Pb36.1minB313.71.63471.391.32a6278.216.19211_Bi2.14min(99.724%)6622.983.541