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Periodic Table of Elements

Hf - Hafnium

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Nuclides / Isotopes

Nuc- lide	Atomic Mass	NN	Abun %	Spin	Half Life	DM	DT	BR %	Decay Energy (MeV)
Hf154	153.964	82	Syn	0+	2s	ε	Lu154	~100	6.700
					2s	α	Yb150	~0	3.400
meta state 2.671MeV			Syn	10+	9us	IT			2.671
Hf155	154.963	83	Syn		0.89s	α	Yb151		4.600
					0.89s	ε	Lu155		8.000
Hf156	155.959	84	Syn	0+	25ms	α	Yb152	>=81	6.033
Hf157	156.958	85	Syn	7/2-	110ms	α	Yb153	86	5.880
					110ms	ε	Lu157	14	7.500
Hf158	157.955	86	Syn	0+	2.85s	ε	Lu158	56	5.100
					2.85s	α	Yb154	44	5.403
Hf159	158.954	87	Syn		5.6s	ε	Lu159	59	6.700
					5.6s	α	Yb155	41	5.220
Hf160	159.951	88	Syn	0+	13.6s	ε	Lu160	99.3	4.370
					13.6s	α	Yb156	0.7	4.903
Hf161	160.9503	89	Syn	13/2+	16.8s	ε	Lu161	>=99.71	6.300
					16.8s	α	Yb157	<=0.29	4.720
Hf162	161.9472	90	Syn	0+	37.6s	ε	Lu162	99.99	3.710
					37.6s	α	Yb158	0.008	4.417
Hf163	162.947	91	Syn		40s	ε	Lu163		5.500
Hf164	163.944	92	Syn	0+	111s	ε	Lu164		2.970
Hf165	164.945	93	Syn	5/2-	76s	ε	Lu165		4.600
Hf166	165.942	94	Syn	0+	6.77m	ε	Lu166		2.300
Hf167	166.943	95	Syn	5/2-	2.05m	ε	Lu167		4.000
Hf168	167.941	96	Syn	0+	25.95m	ε	Lu168		1.800
Hf169	168.9412	97	Syn	5/2-	3.24m	ε	Lu169		3.270
Hf170	169.94	98	Syn	0+	16.01h	ε	Lu170		1.100
Hf171	170.94	99	Syn	7/2+	12.1h	ε	Lu171		2.400
Hf172	171.9395	100	Syn	0+	1.87y	ε	Lu172		0.350
Hf173	172.941	101	Syn	1/2-	23.6h	ε	Lu173		1.610
Hf174	173.94	102	0.162	0+	2.0E¹⁵y	α	Yb170		2.495
Hf175	174.9415	103	Syn	5/2-	70d	ε	Lu175		0.686
Hf176	175.9414	104	5.206	0+	Stable
Hf177	176.9432	105	18.606	7/2-	Stable
meta state 1.315MeV			Syn	23/2+	1.08s	IT			1.315
meta state 2.740MeV			Syn	37/2-	51.4m	IT			2.740
Hf178	177.9437	106	27.297	0+	Stable
meta state 1.147MeV			Syn	8-	4s	IT			1.147
meta state 2.446MeV			Syn	16+	31y	IT			2.446
Hf179	178.9458	107	13.629	9/2+	Stable
meta state 0.375MeV			Syn	1/2-	18.67s	IT			0.375
meta state 1.106MeV			Syn	25/2-	25.05d	IT			1.106
Hf180	179.9465	108	35.1	0+	Stable
meta state 1.141MeV			Syn	8-	5.5h	IT		99.7	1.141
					5.5h	β^-	Ta180	0.3	1.287
Hf181	180.9491	109	Syn	1/2-	42.39d	β^-	Ta181		1.027
Hf182	181.9506	110	Syn	0+	9E⁶y	β^-	Ta182		0.373
meta state 1.173MeV			Syn	8-	61.5m	β^-	Ta182	58	1.546
					61.5m	IT		42	1.173
Hf183	182.9535	111	Syn	3/2-	1.067h	β^-	Ta183		2.010
Hf184	183.9554	112	Syn	0+	4.12h	β^-	Ta184		1.340
meta state 0.000MeV			Syn	8-	48s	β^-	Ta184		1.340
Hf185		113	Syn		3.5m
Hf186		114	Syn	0+

Nuclide	Potential Parent Nuclides
Hf154	W158 (Syn)
meta state 2.671MeV	None known
Hf155	Ta156 (Syn) W159 (Syn)
Hf156	Ta156 (Syn) W160 (Syn)
Hf157	W161 (Syn)
Hf158	Ta158 (Syn) W162 (Syn)
Hf159	Ta159 (Syn) W163 (Syn)
Hf160	Ta160 (Syn)
Hf161	Ta161 (Syn) W165 (Syn)
Hf162	Ta162 (Syn) W166 (Syn)
Hf163	Ta163 (Syn) W167 (Syn)
Hf164	Ta164 (Syn) W168 (Syn)
Hf165	Ta165 (Syn)
Hf166	Ta166 (Syn)
Hf167	Ta167 (Syn)
Hf168	Ta168 (Syn)
Hf169	Ta169 (Syn)
Hf170	Ta170 (Syn)
Hf171	Ta171 (Syn)
Hf172	Ta172 (Syn)
Hf173	Ta173 (Syn)
Hf174	Ta174 (Syn)
Hf175	Ta175 (Syn)
Hf176	Lu176 (Natural) Lu176m (Syn) Ta176 (Syn)
Hf177	Lu177 (Syn) Lu177m (Syn) Ta177 (Syn)
meta state 1.315MeV	None known
meta state 2.740MeV	None known
Hf178	Lu178 (Syn) Lu178m (Syn) Ta178 (Syn) Ta178m (Syn)
meta state 1.147MeV	None known
meta state 2.446MeV	None known
Hf179	Lu179 (Syn) Ta179 (Syn)
meta state 0.375MeV	None known
meta state 1.106MeV	None known
Hf180	Lu180 (Syn) Ta180 (Natural) Ta180m (Syn) W184 (Natural)
meta state 1.141MeV	None known
Hf181	Lu181 (Syn)
Hf182	Lu182 (Syn)
meta state 1.173MeV	None known
Hf183	Lu183 (Syn)
Hf184	Lu184 (Syn) Lu184m (Syn)
meta state 0.000MeV	None known
Hf185	None known
Hf186	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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Periodic Table of Elements

Hf - Hafnium

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