It's Elemental - Isotopes of the Element Praseodymium

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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.

Isotopes of the Element Praseodymium with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

141	100%	Stable

All Known Isotopes of the Element Praseodymium

Mass Number	Half-life	Decay Mode	Branching Percentage

121	1.4 seconds	Proton Emission	No Data Available

122	≈ 0.5 seconds	Electron Capture	No Data Available

123	≈ 0.8 seconds	Electron Capture	No Data Available

124	1.2 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

125	3.3 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

126	3.14 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

127	4.2 seconds	Electron Capture	100.00

128	2.84 seconds	Electron Capture	100.00

129	32 seconds	Electron Capture	> 0.00

130	40.0 seconds	Electron Capture	100.00

131	94 seconds	Electron Capture	100.00

131_m	5.7 seconds	Isomeric Transition	96.40

		Electron Capture	3.60

132	1.6 minutes	Electron Capture	100.00

133	6.5 minutes	Electron Capture	100.00

134	17 minutes	Electron Capture	100.00

134_m	≈ 11 minutes	Electron Capture	100.00

135	24 minutes	Electron Capture	100.00

136	13.1 minutes	Electron Capture	100.00

137	1.28 hours	Electron Capture	100.00

138	1.45 minutes	Electron Capture	100.00

138_m	2.12 hours	Electron Capture	100.00

139	4.41 hours	Electron Capture	100.00

140	3.39 minutes	Electron Capture	100.00

141	Stable	-	-

142	19.12 hours	Beta-minus Decay	99.98

		Electron Capture	0.02

142_m	14.6 minutes	Isomeric Transition	100.00

143	13.57 days	Beta-minus Decay	100.00

144	17.28 minutes	Beta-minus Decay	100.00

144_m	7.2 minutes	Isomeric Transition	99.93

		Beta-minus Decay	0.07

145	5.984 hours	Beta-minus Decay	100.00

146	24.15 minutes	Beta-minus Decay	100.00

147	13.4 minutes	Beta-minus Decay	100.00

148	2.29 minutes	Beta-minus Decay	100.00

148_m	2.01 minutes	Beta-minus Decay	100.00

149	2.26 minutes	Beta-minus Decay	100.00

150	6.19 seconds	Beta-minus Decay	100.00

151	18.90 seconds	Beta-minus Decay	100.00

152	3.63 seconds	Beta-minus Decay	100.00

153	4.28 seconds	Beta-minus Decay	100.00

154	2.3 seconds	Beta-minus Decay	100.00

155	> 300 nanoseconds	No Data Available	No Data Available

156	> 300 nanoseconds	No Data Available	No Data Available

157	≈ 0.3 seconds	Beta-minus Decay	No Data Available

158	≈ 0.2 seconds	Beta-minus Decay	No Data Available

159	≈ 0.1 seconds	Beta-minus Decay	No Data Available