Isotopes of zirconium
List of isotopes
Bold for isotopes with half-lives longer than the age of the universe (nearly stable) Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes Second most powerful known neutron absorber Fission product Long-lived fission product Believed to decay by β−β− to ⁹⁴Mo with a half-life over 1.1×10¹⁷ years Primordial radionuclide Theorized to also undergo β− decay to ⁹⁶Nb with a partial half-life greater than 2.4×10¹⁹ y

Isotopes of zirconium

Section Title: List of isotopes
Table Section Text: Bold for isotopes with half-lives longer than the age of the universe (nearly stable) Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes Second most powerful known neutron absorber Fission product Long-lived fission product Believed to decay by β−β− to ⁹⁴Mo with a half-life over 1.1×10¹⁷ years Primordial radionuclide Theorized to also undergo β− decay to ⁹⁶Nb with a partial half-life greater than 2.4×10¹⁹ y

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

78Zr	40	38	77.95523(54)#	50# ms [>170 ns]	0+

79Zr	40	39	78.94916(43)#	56(30) ms	β+, p	78Sr	5/2+#

β+	79Y

80Zr	40	40	79.9404(16)	4.6(6) s	β+	80Y	0+

81Zr	40	41	80.93721(18)	5.5(4) s	β+ (>99.9%)	81Y	(3/2−)#

β+, p (<.1%)	80Sr

82Zr	40	42	81.93109(24)#	32(5) s	β+	82Y	0+

83Zr	40	43	82.92865(10)	41.6(24) s	β+ (>99.9%)	83Y	(1/2−)#

β+, p (<.1%)	82Sr

84Zr	40	44	83.92325(21)#	25.9(7) min	β+	84Y	0+

85Zr	40	45	84.92147(11)	7.86(4) min	β+	85Y	7/2+

85mZr	292.2(3) keV	10.9(3) s	IT (92%)	85Zr	(1/2−)

β+ (8%)	85Y

86Zr	40	46	85.91647(3)	16.5(1) h	β+	86Y	0+

87Zr	40	47	86.914816(9)	1.68(1) h	β+	87Y	(9/2)+

87mZr	335.84(19) keV	14.0(2) s	IT	87Zr	(1/2)−

88Zr	40	48	87.910227(11)	83.4(3) d	EC	88Y	0+

89Zr	40	49	88.908890(4)	78.41(12) h	β+	89Y	9/2+

89mZr	587.82(10) keV	4.161(17) min	IT (93.77%)	89Zr	1/2−

β+ (6.23%)	89Y

90Zr	40	50	89.9047044(25)	Stable	0+	0.5145(40)

90m1Zr	2319.000(10) keV	809.2(20) ms	IT	90Zr	5-

90m2Zr	3589.419(16) keV	131(4) ns	8+

91Zr	40	51	90.9056458(25)	Stable	5/2+	0.1122(5)

91mZr	3167.3(4) keV	4.35(14) µs	(21/2+)

92Zr	40	52	91.9050408(25)	Stable	0+	0.1715(8)

93Zr	40	53	92.9064760(25)	1.53(10)×106 y	β−	93Nb	5/2+

94Zr	40	54	93.9063152(26)	Observationally Stable	0+	0.1738(28)

95Zr	40	55	94.9080426(26)	64.032(6) d	β−	95Nb	5/2+

96Zr	40	56	95.9082734(30)	20(4)×1018 y	β−β−	96Mo	0+	0.0280(9)

97Zr	40	57	96.9109531(30)	16.744(11) h	β−	97mNb	1/2+

98Zr	40	58	97.912735(21)	30.7(4) s	β−	98Nb	0+

99Zr	40	59	98.916512(22)	2.1(1) s	β−	99mNb	1/2+

100Zr	40	60	99.91776(4)	7.1(4) s	β−	100Nb	0+

101Zr	40	61	100.92114(3)	2.3(1) s	β−	101Nb	3/2+

102Zr	40	62	101.92298(5)	2.9(2) s	β−	102Nb	0+

103Zr	40	63	102.92660(12)	1.3(1) s	β−	103Nb	(5/2−)

104Zr	40	64	103.92878(43)#	1.2(3) s	β−	104Nb	0+

105Zr	40	65	104.93305(43)#	0.6(1) s	β− (>99.9%)	105Nb

β−, n (<.1%)	104Nb

106Zr	40	66	105.93591(54)#	200# ms [>300 ns]	β−	106Nb	0+

107Zr	40	67	106.94075(32)#	150# ms [>300 ns]	β−	107Nb

108Zr	40	68	107.94396(64)#	80# ms [>300 ns]	β−	108Nb	0+

109Zr	40	69	108.94924(54)#	60# ms [>300 ns]

110Zr	40	70	109.95287(86)#	30# ms [>300 ns]	0+

Sentence(s)

Isotopes of zirconium have half-lives less than a day except for ⁹⁵Zr, ⁸⁸Zr (83.4 days), and ⁸⁹Zr (78.41 hours).

final_sentence: Isotopes of zirconium have half-lives less than a day except for ⁹⁵Zr, ⁸⁸Zr (83.4 days), and ⁸⁹Zr (78.41 hours).