Isotopes of the Element Berkelium
[Click for Main Data]

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 Berkelium

Mass Number	Half-life	Decay Mode	Branching Percentage

235	≈ 20 seconds	Electron Capture	No Data Available

		Alpha Decay	No Data Available

236	≈ 1 minutes	Alpha Decay	No Data Available

		Electron Capture	No Data Available

237	≈ 1 minutes	Electron Capture	No Data Available

		Alpha Decay	No Data Available

238	144 seconds	Electron Capture	100.00

		Electron Capture with delayed Spontaneous Fission	0.048

		Alpha Decay	No Data Available

239	≈ 3 minutes	Electron Capture	No Data Available

240	4.8 minutes	Electron Capture	~ 100.00

		Electron Capture with delayed Spontaneous Fission	No Data Available

241	≈ 3 minutes	Alpha Decay	No Data Available

		Electron Capture	No Data Available

242	7.0 minutes	Electron Capture	<= 100.00

242_m	9.5 nanoseconds	Spontaneous Fission	<= 100.00

242_m2	600 nanoseconds	Spontaneous Fission	<= 100.00

243	4.5 hours	Electron Capture	~ 99.85

		Alpha Decay	~ 0.15

244	4.35 hours	Electron Capture	99.994

		Alpha Decay	6.0E-3

245	4.94 days	Electron Capture	99.88

		Alpha Decay	0.12

246	1.80 days	Electron Capture	100.00

		Alpha Decay	< 0.20

247	1380 years	Alpha Decay	<= 100.00

248	> 9 years	Alpha Decay	No Data Available

248_m	23.7 hours	Beta-minus Decay	70.00

		Electron Capture	30.00

249	330 days	Beta-minus Decay	100.00

		Alpha Decay	1.4E-3

		Spontaneous Fission	4.7E-8

250	3.212 hours	Beta-minus Decay	100.00

251	55.6 minutes	Beta-minus Decay	100.00

252	≈ 2 minutes	Beta-minus Decay	No Data Available

		Alpha Decay	No Data Available

253	≈ 10 minutes	Beta-minus Decay	No Data Available

254	≈ 2 minutes	Beta-minus Decay	No Data Available

This page is maintained by Steve Gagnon.

Isotopes of the Element Berkelium[Click for Main Data]