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Periodic Table of Elements

Ce - Cerium

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Nuclides / Isotopes

Nuc- lide	Atomic Mass	NN	Abun %	Spin	Half Life	DM	DT	BR %	Decay Energy (MeV)
Ce119	118.953	61	Syn
Ce120	119.947	62	Syn	0+
Ce121	120.944	63	Syn
Ce122	121.938	64	Syn	0+
Ce123	122.936	65	Syn	5/2	3.2s	ε	La123		8.600
					3.2s	ε + P	Ba122		6.900
Ce124	123.931	66	Syn	0+	6s	ε	La124		5.600
Ce125	124.929	67	Syn	5/2+	9s	ε	La125		7.300
					9s	ε + P	Ba124		5.200
Ce126	125.924	68	Syn	0+	50s	ε	La126	>0	4.400
Ce127	126.923	69	Syn	5/2+	31s	ε	La127		6.100
Ce128	127.919	70	Syn	0+	4.1s	ε	La128		3.200
Ce129	128.918	71	Syn	5/2+	3.5m	ε	La129	>0	5.050
Ce130	129.915	72	Syn	0+	25m	ε	La130		2.200
Ce131	130.914	73	Syn	7/2+	10.2m	ε	La131		4.000
meta state 0.000MeV			Syn	1/2+	5m	ε	La131		4.000
Ce132	131.911	74	Syn	0+	3.51h	ε	La132		1.290
					3.51h	IT			2.341
meta state 2.340MeV			Syn	8-, 9-	13ms
Ce133	132.912	75	Syn	1/2+	97m	ε	La133		2.900
meta state 0.037MeV			Syn	9/2-	4.9h	ε	La133		2.937
Ce134	133.909	76	Syn	0+	3.16d	ε	La134		0.500
Ce135	134.9091	77	Syn	1/2+	17.7h	ε	La135		2.026
meta state 0.445MeV			Syn	1/2-	20s	IT			0.446
Ce136	135.9071	78	0.19	0+	Stable
Ce137	136.9078	79	Syn	3/2+	9h	ε	La137		1.222
meta state 0.254MeV			Syn	11/2-	34.4h	IT		99.22	0.254
					34.4h	ε	La137	0.78	1.476
Ce138	137.906	80	0.25	0+	Stable
meta state 2.129MeV			Syn	7-	8.65ms	IT			2.129
Ce139	138.9067	81	Syn	3/2+	137.640d	ε	La139		0.278
meta state 0.754MeV			Syn	11/2-	54.8s	IT			0.754
Ce140	139.9054	82	88.48	0+	Stable
Ce141	140.9083	83	Syn	7/2-	32.501d	β^-	Pr141		0.581
Ce142	141.9092	84	11.08	0+	>5E¹⁶y	β^-	Nd142
Ce143	142.9124	85	Syn	3/2-	33.039h	β^-	Pr143		1.462
Ce144	143.9136	86	Syn	0+	284.893d	β^-	Pr144		0.319
Ce145	144.9172	87	Syn	3/2-	3.01m	β^-	Pr145		2.540
Ce146	145.9187	88	Syn	0+	13.52m	β^-	Pr146		1.040
Ce147	146.9225	89	Syn	5/2-	56.4s	β^-	Pr147		3.290
Ce148	147.924	90	Syn	0+	56s	β^-	Pr148		2.060
Ce149	148.9283	91	Syn	3/2-	5.3s	β^-	Pr149		4.190
Ce150	149.93	92	Syn	0+	4s	β^-	Pr150		3.010
Ce151	150.934	93	Syn		1.02s	β^-	Pr151		5.400
Ce152	151.936	94	Syn	0+	1.4s	β^-	Pr152		4.500
Ce153	152.941	95	Syn		>150ns
Ce154	153.943	96	Syn	0+	>150ns
Ce155	154.948	97	Syn		>150ns
Ce156	155.951	98	Syn	0+
Ce157	156.956	99	Syn

Nuclide	Potential Parent Nuclides
Ce119	None known
Ce120	None known
Ce121	None known
Ce122	None known
Ce123	None known
Ce124	Pr124 (Syn)
Ce125	None known
Ce126	Nd127 (Syn) Pr126 (Syn)
Ce127	Pr127 (Syn)
Ce128	Nd129 (Syn) Pr128 (Syn)
Ce129	Pr129 (Syn)
Ce130	Nd131 (Syn) Pr130 (Syn)
Ce131	Pr131 (Syn) Pr131m (Syn)
meta state 0.000MeV	None known
Ce132	Pr132 (Syn)
meta state 2.340MeV	None known
Ce133	Pr133 (Syn)
meta state 0.037MeV	None known
Ce134	Pr134 (Syn) Pr134m (Syn)
Ce135	Pr135 (Syn)
meta state 0.445MeV	None known
Ce136	Pr136 (Syn)
Ce137	Pr137 (Syn)
meta state 0.254MeV	None known
Ce138	La138 (Natural) Pr138 (Syn) Pr138m (Syn)
meta state 2.129MeV	None known
Ce139	Pr139 (Syn)
meta state 0.754MeV	None known
Ce140	La140 (Syn) Nd144 (Natural) Pr140 (Syn)
Ce141	La141 (Syn)
Ce142	La142 (Syn) Pr142 (Syn)
Ce143	La143 (Syn)
Ce144	La144 (Syn)
Ce145	La145 (Syn)
Ce146	La146 (Syn) La146m (Syn) La147 (Syn)
Ce147	La147 (Syn) La148 (Syn)
Ce148	La148 (Syn) La149 (Syn)
Ce149	La149 (Syn) La150 (Syn)
Ce150	La150 (Syn)
Ce151	None known
Ce152	La152 (Syn)
Ce153	None known
Ce154	None known
Ce155	None known
Ce156	None known
Ce157	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

Ce - Cerium

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