90-Th-221
- Atomic Mass: 221.0181715 ± 0.0000112 amu
- Excess Mass: 16926.640 ± 10.429 keV
- Binding Energy: 1696423.894 ± 10.433 keV
- Beta Decay Energy: B- -3439.301 ± 52.548 keV
- Spin: (7/2+)
- Half life: 1.68 MS ( 3.5714 % )
- Mode of decay: Alpha to Ra-217
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Possible parent nuclides:
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Alpha from U-225
Element Th