208(82)Pb->0(1)e+208(81)Tl
208(81)Tl->0(1)e+208(80)Hg
208(80)Hg->0(1)e+208(79)Au
208(79)Au->4(2)He+204(77)Ir
208(82)Pb->0(1)e+208(81)Tl
208(81)Tl->0(1)e+208(80)Hg
208(80)Hg->0(1)e+208(79)Au
208(79)Au->4(2)He+204(77)Ir