It's Elemental - Isotopes of the Element Promethium

Isotopes of the Element Promethium
[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 Promethium

Mass Number	Half-life	Decay Mode	Branching Percentage

128	1.0 seconds	Electron Capture	100.00

		Alpha Decay	No Data Available

		Electron Capture with delayed Proton Emission	No Data Available

129	≈ 1 seconds	Electron Capture	No Data Available

130	2.6 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

131	≈ 4 seconds	Electron Capture	No Data Available

		Electron Capture with delayed Proton Emission	No Data Available

132	6.3 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	~ 5.0E-5

133	15 seconds	Electron Capture	100.00

134	≈ 5 seconds	Electron Capture	100.00

134_m	22 seconds	Electron Capture	100.00

135	45 seconds	Electron Capture	100.00

135_m	49 seconds	Electron Capture	100.00

136	47 seconds	Electron Capture	100.00

136_m	107 seconds	Electron Capture	100.00

137	2.4 minutes	Electron Capture	100.00

138	10 seconds	Electron Capture	100.00

138_m	3.24 minutes	Electron Capture	100.00

		Electron Capture	100.00

139	4.15 minutes	Electron Capture	100.00

139_m	180 milliseconds	Isomeric Transition	99.94

		Electron Capture	0.06

140	9.2 seconds	Electron Capture	100.00

140_m	5.95 minutes	Electron Capture	100.00

141	20.90 minutes	Electron Capture	100.00

142	40.5 seconds	Electron Capture	100.00

142_m	2.0 milliseconds	Isomeric Transition	100.00

143	265 days	Electron Capture	100.00

		Electron Capture	< 5.7E-6

144	363 days	Electron Capture	100.00

145	17.7 years	Electron Capture	100.00

		Alpha Decay	3E-07

146	5.53 years	Electron Capture	66.00

		Beta-minus Decay	34.00

147	2.6234 years	Beta-minus Decay	100.00

148	5.368 days	Beta-minus Decay	100.00

148_m	41.29 days	Beta-minus Decay	95.80

		Isomeric Transition	4.20

149	53.08 hours	Beta-minus Decay	100.00

150	2.68 hours	Beta-minus Decay	100.00

151	28.40 hours	Beta-minus Decay	100.00

152	4.12 minutes	Beta-minus Decay	100.00

152_m	7.52 minutes	Beta-minus Decay	100.00

152_m2	13.8 minutes	Beta-minus Decay	<= 100.00

		Isomeric Transition	>= 0.00

153	5.25 minutes	Beta-minus Decay	100.00

154	2.68 minutes	Beta-minus Decay	100.00

154_m	1.73 minutes	Beta-minus Decay	100.00

155	41.5 seconds	Beta-minus Decay	100.00

156	26.70 seconds	Beta-minus Decay	100.00

157	10.56 seconds	Beta-minus Decay	100.00

158	4.8 seconds	Beta-minus Decay	100.00

159	2 seconds	Beta-minus Decay	No Data Available

160	≈ 2 seconds	Beta-minus Decay	No Data Available

161	≈ 0.7 seconds	Beta-minus Decay	No Data Available

162	≈ 0.5 seconds	Beta-minus Decay	No Data Available

163	≈ 0.2 seconds	Beta-minus Decay	No Data Available

Isotopes of the Element Promethium[Click for Main Data]

Isotopes of the Element Promethium
[Click for Main Data]