It's Elemental - Isotopes of the Element Ruthenium

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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 Ruthenium with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

96	5.54%	Stable

98	1.87%	Stable

99	12.76%	Stable

100	12.60%	Stable

101	17.06%	Stable

102	31.55%	Stable

104	18.62%	Stable

All Known Isotopes of the Element Ruthenium

Mass Number	Half-life	Decay Mode	Branching Percentage

87	> 1.5 microseconds	Electron Capture	No Data Available

88	> 150 nanoseconds	Electron Capture	No Data Available

89	No Data Available	Electron Capture	No Data Available

90	11 seconds	Electron Capture	100.00

91	9 seconds	Electron Capture	100.00

91_m	7.6 seconds	Electron Capture	> 0.00

		Electron Capture with delayed Proton Emission	> 0.00

		Isomeric Transition	No Data Available

92	3.65 minutes	Electron Capture	100.00

93	59.7 seconds	Electron Capture	100.00

93_m	10.8 seconds	Electron Capture	78.00

		Isomeric Transition	22.00

		Electron Capture with delayed Proton Emission	0.03

94	51.8 minutes	Electron Capture	100.00

95	1.643 hours	Electron Capture	100.00

96	Stable	-	-

97	2.791 days	Electron Capture	100.00

98	Stable	-	-

99	Stable	-	-

100	Stable	-	-

101	Stable	-	-

102	Stable	-	-

103	39.26 days	Beta-minus Decay	100.00

103_m	1.69 milliseconds	Isomeric Transition	100.00

104	Stable	-	-

105	4.44 hours	Beta-minus Decay	100.00

106	373.59 days	Beta-minus Decay	100.00

107	3.75 minutes	Beta-minus Decay	100.00

108	4.55 minutes	Beta-minus Decay	100.00

109	34.5 seconds	Beta-minus Decay	100.00

110	11.6 seconds	Beta-minus Decay	100.00

111	2.12 seconds	Beta-minus Decay	100.00

112	1.75 seconds	Beta-minus Decay	100.00

113	0.80 seconds	Beta-minus Decay	100.00

114	0.53 seconds	Beta-minus Decay	100.00

115	740 milliseconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	No Data Available

116	400 milliseconds	No Data Available	No Data Available

117	300 milliseconds	Beta-minus Decay	No Data Available

118	> 150 nanoseconds	Beta-minus Decay	No Data Available

119	> 150 nanoseconds	Beta-minus Decay	No Data Available

120	> 150 nanoseconds	Beta-minus Decay	No Data Available