For this process, the emitted particle's angular momentum equals the spin difference of the parent and daughter since its spin is zero.  
Applying tunnelling theory to the nuclear Coulomb barrier yields a prediction for how the emitted particle's energy depends on the half-life.  For this process, the emitted particle's angular momentum equals the spin difference of the parent and daughter since its spin is zero.  Polonium-210 goes to lead-206 in, for ten points, what radioactive decay consisting of the emission of a helium nucleus?
Applying tunnelling theory to the nuclear Coulomb barrier yields a prediction for how the emitted particle's energy depends on the half-life.  
alpha decay (prompt on radioactive decay, but accept proton radioactivity until "equals")