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Periodic Table of Elements

Er - Erbium

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Nuclides / Isotopes

Nuc- lide	Atomic Mass	NN	Abun %	Spin	Half Life	DM	DT	BR %	Decay Energy (MeV)
Er144		76	Syn	0+
Er145	144.957	77	Syn	11/2-	0.9s
Er146	145.952	78	Syn	0+	1.7s	ε + P	Dy145	>0
					1.7s	ε	Ho146
Er147	146.949	79	Syn	11/2-	2.5s	ε + P	Dy146	>0	8.400
					2.5s	ε	Ho147		9.100
meta state 0.000MeV			Syn	1/2+	~2.5s	ε + P	Dy146	>0	8.400
					~2.5s	ε	Ho147		9.100
Er148	147.944	80	Syn	0+	4.6s	ε	Ho148		6.800
Er149	148.942	81	Syn	1/2+	4s	ε + P	Dy148	7	6.700
					4s	ε	Ho149		7.700
meta state 0.742MeV			Syn	11/2-	8.9s	ε	Ho149	96.5	8.442
					8.9s	IT		3.5	0.742
					8.9s	ε + P	Dy148	0.18	7.442
Er150	149.938	82	Syn	0+	18.5s	ε	Ho150		4.108
Er151	150.937	83	Syn	7/2-	23.5s	ε	Ho151		5.400
meta state 2.585MeV			Syn	27/2-	0.58s	IT		95.3	2.586
					0.58s	ε	Ho151	4.7	7.986
Er152	151.9351	84	Syn	0+	10.3s	α	Dy148	90	4.934
					10.3s	ε	Ho152	10	3.109
Er153	152.9351	85	Syn	7/2-	37.1s	α	Dy149	53	4.803
					37.1s	ε	Ho153	47	4.564
Er154	153.9328	86	Syn	0+	3.73m	ε	Ho154	99.53	2.032
					3.73m	α	Dy150	0.47	4.280
meta state 3.025MeV			Syn	11-	39ns	IT	Er154	~100	3.025
					39ns	α	Dy150	~0	7.305
Er155	154.9332	87	Syn	7/2-	5.3m	ε	Ho155	99.98	3.840
					5.3m	α	Dy151	0.02	4.120
Er156	155.931	88	Syn	0+	19.5m	α	Dy152	0	1.370
					19.5m	ε	Ho156		1.370
Er157	156.9319	89	Syn	3/2-	18.65m	ε	Ho157	~100	3.500
					18.65m	α	Dy153	<0.02	3.300
meta state 0.155MeV			Syn	9/2+	76ms	IT	Er157		0.155
Er158	157.93	90	Syn	0+	2.29h	ε	Ho158		0.900
Er159	158.9307	91	Syn	3/2-	36m	ε	Ho159		2.769
Er160	159.9291	92	Syn	0+	28.58h	ε	Ho160		0.330
Er161	160.93	93	Syn	3/2-	3.21h	ε	Ho161
Er162	161.9288	94	0.14	0+	Stable
Er163	162.93	95	Syn	5/2-	75m	ε	Ho163		1.210
Er164	163.9292	96	1.61	0+	Stable
Er165	164.9307	97	Syn	5/2-	10.36h	ε	Ho165		0.376
Er166	165.9303	98	33.6	0+	Stable
Er167	166.9321	99	22.95	7/2+	Stable
meta state 0.208MeV			Syn	1/2-	2.269s	IT			0.208
Er168	167.9324	100	26.8	0+	Stable
Er169	168.9346	101	Syn	1/2-	9.4d	β^-	Tm169		0.351
Er170	169.9355	102	14.9	0+	Stable
Er171	170.938	103	Syn	5/2-	7.516h	β^-	Tm171		1.490
Er172	171.9394	104	Syn	0+	49.3h	β^-	Tm172		0.891
Er173	172.942	105	Syn	7/2-	1.4m	β^-	Tm173		2.600
Er174	173.944	106	Syn	0+	3.3m	β^-	Tm174		1.800
Er175		107	Syn	9/2+	1.2m	β^-
Er176		108	Syn	0+
Er177		109	Syn

Nuclide	Potential Parent Nuclides
Er144	None known
Er145	Tm146 (Syn) Tm146m (Syn)
Er146	Tm147 (Syn) Tm147m (Syn)
Er147	Tm147 (Syn)
meta state 0.000MeV	None known
Er148	Tm148 (Syn)
Er149	Tm149 (Syn) Yb153 (Syn)
meta state 0.742MeV	None known
Er150	Tm150 (Syn) Yb151 (Syn) Yb154 (Syn)
Er151	Tm151 (Syn) Tm151m (Syn) Yb152 (Syn) Yb155 (Syn)
meta state 2.585MeV	None known
Er152	Tm152 (Syn) Tm152m (Syn) Yb156 (Syn)
Er153	Tm153 (Syn) Tm153m (Syn) Yb157 (Syn)
Er154	Er154m (Syn) Tm154 (Syn) Tm154m (Syn) Yb158 (Syn)
meta state 3.025MeV	None known
Er155	Tm155 (Syn) Tm155m (Syn)
Er156	Tm156 (Syn)
Er157	Er157m (Syn) Tm157 (Syn)
meta state 0.155MeV	None known
Er158	Tm158 (Syn)
Er159	Tm159 (Syn)
Er160	Tm160 (Syn) Tm160m (Syn)
Er161	Tm161 (Syn)
Er162	Tm162 (Syn) Tm162m (Syn)
Er163	Tm163 (Syn)
Er164	Ho164 (Syn) Tm164 (Syn) Tm164m (Syn)
Er165	Tm165 (Syn)
Er166	Ho166 (Syn) Ho166m (Syn) Tm166 (Syn)
Er167	Ho167 (Syn) Tm167 (Syn)
meta state 0.208MeV	None known
Er168	Ho168 (Syn) Ho168m (Syn) Tm168 (Syn)
Er169	Ho169 (Syn)
Er170	Ho170 (Syn) Ho170m (Syn) Tm170 (Syn)
Er171	Ho171 (Syn)
Er172	None known
Er173	None known
Er174	None known
Er175	None known
Er176	None known
Er177	None known
Key: NN = Number of Neutrons Abun % = Natural Abundance (as a percentage) Syn = Synthetic Nuclide (does not occur in nature) DM = Decay Mode α = Alpha emission β^- = Beta emission β^- β^- = Double beta decay β⁺ = Positron emission ε = Electron Capture IT = Isomeric Transition N = Neutron emission P = Proton emission SF = Spontaneous Fission DT = Decays To BR % = Branch Ratio (as a percentage)

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References

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Periodic Table of Elements

Er - Erbium

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