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The Periodic Table of Elements

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Isotopes of the Element Plutonium
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Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

All Known Isotopes of the Element Plutonium

Mass Number		Half-life		Decay Mode		Branching Percentage

228		≈ 0.2 seconds		Alpha Decay		100.00

229		> 2 microseconds		Alpha Decay		100.00

230		≈ 200 seconds		Alpha Decay		<= 100.00

231		8.6 minutes		Electron Capture		<= 99.80

				Alpha Decay		> 0.20

232		34.1 minutes		Electron Capture		80.00

				Alpha Decay		20.00

233		20.9 minutes		Electron Capture		99.88

				Alpha Decay		0.12

234		8.8 hours		Electron Capture		~ 94.00

				Alpha Decay		~ 6.00

235		25.3 minutes		Electron Capture		100.00

				Alpha Decay		2.7E-3

236		2.858 years		Alpha Decay		100.00

				Spontaneous Fission		1.9E-7

237		45.2 days		Electron Capture		100.00

				Alpha Decay		4.2E-3

237_m		0.18 seconds		Isomeric Transition		No Data Available

238		87.7 years		Alpha Decay		100.00

				Spontaneous Fission		1.8E-7

239		24110 years		Alpha Decay		100.00

				Spontaneous Fission		3E-10

240		6564 years		Alpha Decay		100.00

				Spontaneous Fission		5.7E-6

240_m		3.7 nanoseconds		Spontaneous Fission		> 0.00

241		14.290 years		Beta-minus Decay		100.00

				Alpha Decay		2.5E-3

				Spontaneous Fission		> 2.E-14

242		3.75×10⁺⁵ years		Alpha Decay		100.00

				Spontaneous Fission		5.5E-4

242_m		3.5 nanoseconds		Spontaneous Fission		<= 100.00

242_m2		28 nanoseconds		Spontaneous Fission		<= 100.00

243		4.956 hours		Beta-minus Decay		100.00

244		8.00×10⁺⁷ years		Alpha Decay		99.88

				Spontaneous Fission		0.12

245		10.5 hours		Beta-minus Decay		100.00

246		10.84 days		Beta-minus Decay		100.00

247		2.27 days		Beta-minus Decay		100.00

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