The α particles emitted in the decays of 88Ra^226 and 90Th^226 have energies 4.9 MeV and 6.5 MeV,

The α particles emitted in the decays of ₈₈Ra²²⁶ and ₉₀Th²²⁶have energies 4.9 MeV and 6.5 MeV, respectively. Ignoring the difference in their nuclear radii, find the ratio of their half life times.

The α particles emitted in the decays of 88Ra^226 and 90Th^226 have energies 4.9 MeV and 6.5 MeV,

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