Isotopes of ruthenium
List of isotopes
Abbreviations: IT: Isomeric transition Bold for stable isotopes Believed to undergo β⁺β⁺ decay to ⁹⁶Mo with a half-life over 6.7×10¹⁶ years Fission product Believed to undergo β−β− decay to ¹⁰⁴Pd

Isotopes of ruthenium

Section Title: List of isotopes
Table Section Text: Abbreviations: IT: Isomeric transition Bold for stable isotopes Believed to undergo β⁺β⁺ decay to ⁹⁶Mo with a half-life over 6.7×10¹⁶ years Fission product Believed to undergo β−β− decay to ¹⁰⁴Pd

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)

excitation energy

87Ru	44	43	86.94918(64)#	50# ms [>1.5 µs]	β+	87Tc	1/2−#

88Ru	44	44	87.94026(43)#	1.3(3) s [1.2(+3−2) s]	β+	88Tc	0+

89Ru	44	45	88.93611(54)#	1.38(11) s	β+	89Tc	(7/2)(+#)

90Ru	44	46	89.92989(32)#	11.7(9) s	β+	90Tc	0+

91Ru	44	47	90.92629(63)#	7.9(4) s	β+	91Tc	(9/2+)

91mRu	80(300)# keV	7.6(8) s	β+ (>99.9%)	91Tc	(1/2−)

IT (<.1%)	91Ru

β+, p (<.1%)	90Mo

92Ru	44	48	91.92012(32)#	3.65(5) min	β+	92Tc	0+

93Ru	44	49	92.91705(9)	59.7(6) s	β+	93Tc	(9/2)+

93m1Ru	734.40(10) keV	10.8(3) s	β+ (78%)	93Tc	(1/2)−

IT (22%)	93Ru

β+, p (.027%)	92Mo

93m2Ru	2082.6(9) keV	2.20(17) µs	(21/2)+

94Ru	44	50	93.911360(14)	51.8(6) min	β+	94Tc	0+

94mRu	2644.55(25) keV	71(4) µs	(8+)

95Ru	44	51	94.910413(13)	1.643(14) h	β+	95Tc	5/2+

96Ru	44	52	95.907598(8)	Observationally Stable	0+	0.0554(14)

97Ru	44	53	96.907555(9)	2.791(4) d	β+	97mTc	5/2+

98Ru	44	54	97.905287(7)	Stable	0+	0.0187(3)

99Ru	44	55	98.9059393(22)	Stable	5/2+	0.1276(14)

100Ru	44	56	99.9042195(22)	Stable	0+	0.1260(7)

101Ru	44	57	100.9055821(22)	Stable	5/2+	0.1706(2)

101mRu	527.56(10) keV	17.5(4) µs	11/2−

102Ru	44	58	101.9043493(22)	Stable	0+	0.3155(14)

103Ru	44	59	102.9063238(22)	39.26(2) d	β−	103Rh	3/2+

103mRu	238.2(7) keV	1.69(7) ms	IT	103Ru	11/2−

104Ru	44	60	103.905433(3)	Observationally Stable	0+	0.1862(27)

105Ru	44	61	104.907753(3)	4.44(2) h	β−	105Rh	3/2+

106Ru	44	62	105.907329(8)	373.59(15) d	β−	106Rh	0+

107Ru	44	63	106.90991(13)	3.75(5) min	β−	107Rh	(5/2)+

108Ru	44	64	107.91017(12)	4.55(5) min	β−	108Rh	0+

109Ru	44	65	108.91320(7)	34.5(10) s	β−	109Rh	(5/2+)#

110Ru	44	66	109.91414(6)	11.6(6) s	β−	110Rh	0+

111Ru	44	67	110.91770(8)	2.12(7) s	β−	111Rh	(5/2+)

112Ru	44	68	111.91897(8)	1.75(7) s	β−	112Rh	0+

113Ru	44	69	112.92249(8)	0.80(5) s	β−	113Rh	(5/2+)

113mRu	130(18) keV	510(30) ms	(11/2−)

114Ru	44	70	113.92428(25)#	0.53(6) s	β− (>99.9%)	114Rh	0+

β−, n (<.1%)	113Rh

115Ru	44	71	114.92869(14)	740(80) ms	β− (>99.9%)	115Rh

β−, n (<..1%)	114Rh

116Ru	44	72	115.93081(75)#	400# ms [>300 ns]	β−	116Rh	0+

117Ru	44	73	116.93558(75)#	300# ms [>300 ns]	β−	117Rh

118Ru	44	74	117.93782(86)#	200# ms [>300 ns]	β−	118Rh	0+

119Ru	44	75	118.94284(75)#	170# ms [>300 ns]

120Ru	44	76	119.94531(86)#	80# ms [>300 ns]	0+

Sentence(s)

The stable isotopes are ¹⁰⁶Ru, with a half-life of 373.59 days; ¹⁰³Ru, with a half-life of 39.26 days and ⁹⁷Ru.

final_sentence: The stable isotopes are ¹⁰⁶Ru, with a half-life of 373.59 days; ¹⁰³Ru, with a half-life of 39.26 days and ⁹⁷Ru.