244Bi =0e +244Po
83 -1 84
210Po(钋核)=0e+ 210At.
84 -1 85
234Th(钍核)=4He+230Ra;⑵69Cu(铜核).=4He+65Co
90 2 88 29 2 27
4次α衰变 2次β衰变
1/32 g
20天
244Bi =0e +244Po
83 -1 84
210Po(钋核)=0e+ 210At.
84 -1 85
234Th(钍核)=4He+230Ra;⑵69Cu(铜核).=4He+65Co
90 2 88 29 2 27
4次α衰变 2次β衰变
1/32 g
20天