最終更新日：2025/11/21
Measurements show that thorium-228, a radioactive isotope of thorium with a half-life of 1.4 × 1010 years, decays primarily by emitting alpha particles.
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Measurements show that thorium-228, a radioactive isotope of thorium with a half-life of 1.4 × 1010 years, decays primarily by emitting alpha particles.
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