釷的同位素
参考文獻

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↑  虽然镭不是锕系元素，但它紧接在锕系元素锕之前，且有半衰期超过4年，可被列入此表中的同位素，因此镭也被列入其中。
↑  此表列出的是热中子轰击235U的裂变产额。
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↑  是所有半衰期超过四年的同位素中最重的
↑  半衰期远长于232Th，基本可视为稳定的衰变产物被排除在外，如半衰期8×1015年的113Cd。
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Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
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