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Periodic Table of Elements

Th - Thorium

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Nuc- lide	Atomic Mass	NN	Abun %	Spin	Half Life	DM	DT	BR %	Decay Energy (MeV)
Th210		120	Syn	0+	9ms
Th211		121	Syn		37ms
Th212	212.013	122	Syn	0+	30ms	ε	Ac212	~0.30	4.760
					30ms	α	Ra208		7.952
Th213	213.013	123	Syn		140ms	α	Ra209	<=100	7.840
Th214	214.011	124	Syn	0+	100ms	α	Ra210		7.826
Th215	215.0117	125	Syn	1/2-	1.2s	α	Ra211		7.666
Th216	216.0111	126	Syn	0+	0.028s	ε	Ac216	~0.01	2.170
					0.028s	α	Ra212		8.071
meta state 2.028MeV			Syn	8+, 11-	180us	IT	Th216	~97	2.028
					180us	α	Ra212	~3	10.099
Th217	217.0131	127	Syn	9/2+	0.252ms	α	Ra213		9.424
Th218	218.0133	128	Syn	0+	109ns	α	Ra214		9.849
Th219	219.0155	129	Syn		1.05us	α	Ra215		9.510
Th220	220.0157	130	Syn	0+	9.7us	ε	Ac220	2.0E^-7	0.910
					9.7us	α	Ra216		8.953
Th221	221.0182	131	Syn	7/2+	1.68ms	α	Ra217		8.628
Th222	222.0185	132	Syn	0+	2.8ms	α	Ra218		8.129
Th223	223.0208	133	Syn	5/2+	0.60s	α	Ra219		7.567
Th224	224.0215	134	Syn	0+	1.05s	α	Ra220		7.304
Th225	225.0239	135	Syn	3/2+	8.72m	α	Ra221	~90	6.922
					8.72m	ε	Ac225	~10	0.675
Th226	226.0249	136	Syn	0+	30.57m	α	Ra222		6.451
Th227	227.0277	137	Syn	1/2+	18.72d	α	Ra223		6.146
Th228	228.0287	138	Syn	0+	1.9116y	α	Ra224		5.520
Th229	229.0318	139	Syn	5/2+	7340y	α	Ra225		5.168
Th230	230.0331	140	Syn	0+	75380y	SF		<=5.E^-1
					75380y	α	Ra226		4.770
Th231	231.0363	141	Syn	5/2+	25.52h	α	Ra227	~1.0E^-8	4.213
					25.52h	β^-	Pa231		0.389
Th232	232.0381	142	100.	0+	1.405E¹⁰y	SF		<1.0E^-9
					1.405E¹⁰y	α	Ra228		4.083
Th233	233.0416	143	Syn	1/2+	22.3m	β^-	Pa233		1.245
Th234	234.0436	144	Syn	0+	24.10d	β^-	Pa234		0.273
Th235	235.0475	145	Syn	1/2+	7.1m	β^-	Pa235		1.930
Th236	236.05	146	Syn	0+	37.5m	β^-	Pa236
Th237		147	Syn		5m
Th238		148	Syn

Nuclide	Potential Parent Nuclides
Th210	None known
Th211	None known
Th212	None known
Th213	None known
Th214	U218 (Syn)
Th215	U219 (Syn)
Th216	Pa216 (Syn) Th216m (Syn)
meta state 2.028MeV	None known
Th217	None known
Th218	U222 (Syn)
Th219	U223 (Syn)
Th220	Pa220 (Syn) U224 (Syn)
Th221	U225 (Syn)
Th222	U226 (Syn)
Th223	U227 (Syn)
Th224	Ac224 (Syn) U228 (Syn)
Th225	U229 (Syn)
Th226	Ac226 (Syn) Pa226 (Syn) U230 (Syn)
Th227	Ac227 (Natural) Pa227 (Syn) U231m (Syn)
Th228	Ac228 (Syn) Pa228 (Syn) U232 (Syn)
Th229	Ac229 (Syn) Pa229 (Syn) U233 (Syn)
Th230	Ac230 (Syn) Pa230 (Syn) U234 (Natural)
Th231	Ac231 (Syn) Pa231 (Natural) U235 (Natural)
Th232	Ac232 (Syn) Pa232 (Syn) U236 (Syn)
Th233	Ac233 (Syn)
Th234	Ac234 (Syn) U238 (Natural)
Th235	None known
Th236	None known
Th237	None known
Th238	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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