It's Elemental - Isotopes of the Element Europium

Isotopes of the Element Europium
[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.

Isotopes of the Element Europium with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

151	47.81%	Stable

153	52.19%	Stable

All Known Isotopes of the Element Europium

Mass Number	Half-life	Decay Mode	Branching Percentage

131	17.8 milliseconds	Proton Emission	87.90

		Electron Capture	12.10

132	≈ 0.4 seconds	Electron Capture	No Data Available

133	≈ 1 seconds	Electron Capture	No Data Available

134	0.5 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	> 0.00

135	1.5 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

136	3.3 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	0.09

136_m	3.8 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	0.09

137	11 seconds	Electron Capture	100.00

138	12.1 seconds	Electron Capture	100.00

139	17.9 seconds	Electron Capture	100.00

140	1.51 seconds	Electron Capture	100.00

140_m	125 milliseconds	Isomeric Transition	100.00

		Electron Capture	< 1.00

141	40.7 seconds	Electron Capture	100.00

141_m	2.7 seconds	Isomeric Transition	87.00

		Electron Capture	13.00

142	2.34 seconds	Electron Capture	100.00

142_m	1.223 minutes	Electron Capture	100.00

143	2.59 minutes	Electron Capture	100.00

144	10.2 seconds	Electron Capture	100.00

145	5.93 days	Electron Capture	100.00

146	4.61 days	Electron Capture	100.00

147	24.1 days	Electron Capture	100.00

		Alpha Decay	2.2E-3

148	54.5 days	Electron Capture	100.00

		Alpha Decay	9.4E-7

149	93.1 days	Electron Capture	100.00

150	36.9 years	Electron Capture	100.00

150_m	12.8 hours	Beta-minus Decay	89.00

		Electron Capture	11.00

		Isomeric Transition	<= 5.0E-8

151	Stable	-	-

152	13.516 years	Electron Capture	72.10

		Beta-minus Decay	27.90

152_m	9.3116 hours	Beta-minus Decay	72.00

		Electron Capture	28.00

152_m2	96 minutes	Isomeric Transition	100.00

153	Stable	-	-

154	8.593 years	Beta-minus Decay	99.98

		Electron Capture	0.02

154_m	46.3 minutes	Isomeric Transition	100.00

155	4.7611 years	Beta-minus Decay	100.00

156	15.19 days	Beta-minus Decay	100.00

157	15.18 hours	Beta-minus Decay	100.00

158	45.9 minutes	Beta-minus Decay	100.00

159	18.1 minutes	Beta-minus Decay	100.00

160	38 seconds	Beta-minus Decay	100.00

161	26 seconds	Beta-minus Decay	100.00

162	10.6 seconds	Beta-minus Decay	100.00

163	No Data Available	Beta-minus Decay	No Data Available

164	≈ 2 seconds	Beta-minus Decay	No Data Available

165	≈ 1 seconds	Beta-minus Decay	No Data Available

166	≈ 0.4 seconds	Beta-minus Decay	No Data Available

167	≈ 0.2 seconds	Beta-minus Decay	No Data Available

Isotopes of the Element Europium[Click for Main Data]

Isotopes of the Element Europium
[Click for Main Data]