[填空题]
What is the energy oxj g/uypk+ egkbtyuv:2, 4a5 )f the n9;qb 5 xo gg1e i6ynrg*)-ime4yt6wd $\alpha$ particle emitted in the decay $_{84}^{210}\text{Po} \to _{82}^{206}\text{Pb} + \alpha$? Take into account the recoil of the daughter nucleus. $\text{KE}$ = $MeV$