It's Elemental - Isotopes of the Element Yttrium

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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 Yttrium with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

89	100%	Stable

All Known Isotopes of the Element Yttrium

Mass Number	Half-life	Decay Mode	Branching Percentage

77	< 1.2 microseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

78	55 milliseconds	Electron Capture	No Data Available

78_m	5.8 seconds	Electron Capture	No Data Available

79	14.8 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

80	30.1 seconds	Electron Capture	100.00

80_m	4.7 seconds	Electron Capture	No Data Available

		Isomeric Transition	No Data Available

81	70.4 seconds	Electron Capture	100.00

82	8.3 seconds	Electron Capture	100.00

83	7.08 minutes	Electron Capture	100.00

83_m	2.85 minutes	Electron Capture	60.00

		Isomeric Transition	40.00

84	4.6 seconds	Electron Capture	100.00

84_m	39.5 minutes	Electron Capture	100.00

85	2.68 hours	Electron Capture	100.00

85_m	4.86 hours	Electron Capture	100.00

		Isomeric Transition	< 2.0E-3

86	14.74 hours	Electron Capture	100.00

86_m	48 minutes	Isomeric Transition	99.31

		Electron Capture	0.69

87	79.8 hours	Electron Capture	100.00

87_m	13.37 hours	Isomeric Transition	98.43

		Electron Capture	1.57

88	106.65 days	Electron Capture	100.00

89	Stable	-	-

89_m	15.28 seconds	Isomeric Transition	100.00

90	64.00 hours	Beta-minus Decay	100.00

90_m	3.19 hours	Isomeric Transition	100.00

		Beta-minus Decay	1.8E-3

91	58.51 days	Beta-minus Decay	100.00

91_m	49.71 minutes	Isomeric Transition	100.00

		Beta-minus Decay	< 1.50

92	3.54 hours	Beta-minus Decay	100.00

93	10.18 hours	Beta-minus Decay	100.00

93_m	0.82 seconds	Isomeric Transition	100.00

94	18.7 minutes	Beta-minus Decay	100.00

95	10.3 minutes	Beta-minus Decay	100.00

96	5.34 seconds	Beta-minus Decay	100.00

96_m	9.6 seconds	Beta-minus Decay	100.00

97	3.75 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	0.058

97_m	1.17 seconds	Beta-minus Decay	> 99.30

		Isomeric Transition	< 0.70

		Beta-minus Decay with delayed Neutron Emission	< 0.08

97_m2	142 milliseconds	Isomeric Transition	> 80.00

		Beta-minus Decay	< 20.00

98	0.548 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	0.33

98_m	2.0 seconds	Beta-minus Decay	90.00

		Isomeric Transition	< 20.00

		Beta-minus Decay with delayed Neutron Emission	3.40

99	1.470 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	1.90

99_m	8.6 microseconds	Isomeric Transition	100.00

100	735 milliseconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	0.92

100_m	0.94 seconds	Beta-minus Decay	100.00

101	0.45 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	1.5

102	0.30 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	4.00

102_m	0.36 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	4.00

103	0.23 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	8.00

104	180 milliseconds	No Data Available	No Data Available

105	> 150 nanoseconds	Beta-minus Decay	No Data Available

106	> 150 nanoseconds	Beta-minus Decay	No Data Available

107	≈ 30 milliseconds	Beta-minus Decay	100.00

108	20 milliseconds	Beta-minus Decay	No Data Available

		Beta-minus Decay with delayed Neutron Emission	No Data Available