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Periodic Table of Elements

Tl - Thallium

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Nuclides / Isotopes

Nuc- lide	Atomic Mass	NN	Abun %	Spin	Half Life	DM	DT	BR %	Decay Energy (MeV)
Tl176		95	Syn
Tl177	176.997	96	Syn		<1us
Tl178	177.995	97	Syn
Tl179	178.991	98	Syn		0.16s	α	Au175	~100	6.860
meta state 0.000MeV			Syn	9/2-	1.4ms	α	Au175	~100	6.860
Tl180	179.99	99	Syn		0.7s	α	Au176		6.820
					0.7s	ε	Hg180		11.100
Tl181	180.987	100	Syn	1/2+	3.4s	ε	Hg181		8.500
Tl182	181.986	101	Syn	7+	3.1s	ε	Hg182	>96	10.100
					3.1s	α	Au178	<4	6.550
Tl183	182.983	102	Syn	1/2+	6.9s	ε	Hg183	>0	7.600
meta state 0.550MeV			Syn	9/2-	60ms	α	Au179	<0.01	6.850
					60ms	IT	Tl183		0.550
Tl184	183.982	103	Syn	2+	11s	ε	Hg184	97.9	9.200
					11s	α	Au180	2.1	6.300
Tl185	184.979	104	Syn	1/2+	19.5s	ε	Hg185		6.600
meta state 0.454MeV			Syn	9/2-	1.83s	α	Au181		6.554
					1.83s	IT			0.454
Tl186	185.979	105	Syn	7+	27.5s	α	Au182	0.0006	5.890
					27.5s	ε	Hg186		8.500
meta state 0.374MeV			Syn	10-	2.9s	IT			0.374
Tl187	186.976	106	Syn	1/2+	~51s	ε	Hg187	<100	5.900
					~51s	α	Au183	>0	5.539
meta state 0.335MeV			Syn	9/2-	15.6s	ε	Hg187	<100	6.235
					15.6s	IT		<100	0.335
					15.6s	α	Au183	>0	5.874
Tl188	187.976	107	Syn	2-	71s	ε	Hg188		7.800
meta state 0.000MeV			Syn	7+	71s	ε	Hg188		7.800
Tl189	188.974	108	Syn	1/2+	2.3m	ε	Hg189		5.180
meta state 0.281MeV			Syn	9/2-	1.4m	IT	Tl189	<4	0.281
					1.4m	ε	Hg189		5.461
Tl190	189.974	109	Syn	2-	2.6m	ε	Hg190		7.000
meta state 0.000MeV			Syn	7+	3.7m	ε	Hg190		7.000
Tl191	190.972	110	Syn	1/2+		ε	Hg191		4.490
meta state 0.299MeV			Syn	9/2-	5.22m	ε	Hg191		4.789
Tl192	191.972	111	Syn	2-	9.6m	ε	Hg192		6.120
meta state 0.000MeV			Syn	7+	10.8m	ε	Hg192		6.120
Tl193	192.971	112	Syn	1/2+	21.6m	ε	Hg193		3.640
meta state 0.365MeV			Syn	9/2-	2.11m	IT		75	0.365
					2.11m	ε	Hg193	25	4.005
Tl194	193.971	113	Syn	2-	33m	α	Au190	<1.0E^-7	3.490
					33m	ε	Hg194		5.280
meta state 0.000MeV			Syn	7+	32.8m	ε	Hg194		5.280
Tl195	194.97	114	Syn	1/2+	1.16h	ε	Hg195		2.810
meta state 0.482MeV			Syn	9/2-	3.6s	IT			0.483
Tl196	195.971	115	Syn	2-	1.84h	ε	Hg196		4.380
meta state 0.394MeV			Syn	7+	1.41h	ε	Hg196	95.5	4.774
					1.41h	IT		4.5	0.394
Tl197	196.9695	116	Syn	1/2+	2.84h	ε	Hg197		2.180
meta state 0.608MeV			Syn	9/2-	0.54s	IT			0.608
Tl198	197.9705	117	Syn	2-	5.3h	ε	Hg198		3.460
meta state 0.544MeV			Syn	7+	1.87h	ε	Hg198	54	4.004
					1.87h	IT		46	0.544
meta state 0.742MeV			Syn	10-	32.1ms	IT			0.742
Tl199	198.97	118	Syn	1/2+	7.42h	ε	Hg199		1.440
meta state 0.750MeV			Syn	9/2-	28.4ms	IT			0.750
Tl200	199.971	119	Syn	2-	26.1h	ε	Hg200		2.456
meta state 0.753MeV			Syn	7+	34.3ms	IT			0.754
Tl201	200.9708	120	Syn	1/2+	72.912h	ε	Hg201		0.483
meta state 0.920MeV			Syn	9/2-	2.035ms	IT			0.920
Tl202	201.9721	121	Syn	2-	12.23d	ε	Hg202		1.365
Tl203	202.9723	122	29.524	1/2+	Stable
Tl204	203.9739	123	Syn	2-	3.78y	b	Pb204	97.1	0.764
					3.78y	ε	Hg204	2.9	0.347
Tl205	204.9744	124	70.476	1/2+	Stable
Tl206	205.9761	125	Syn	0-	4.199m	β^-	Pb206		1.533
meta state 2.643MeV			Syn	12-	3.74m	IT			2.643
Tl207	206.9774	126	Syn	1/2+	4.77m	β^-	Pb207		1.423
meta state 1.348MeV			Syn	11/2-	1.33s	IT			1.348
Tl208	207.982	127	Syn	5+	3.053m	β^-	Pb208		5.001
Tl209	208.9853	128	Syn	1/2+	2.20m	β^-	Pb209		3.980
Tl210	209.9901	129	Syn	5+	1.30m	β^- + N	Pb209	0.007	0.299
					1.30m	β^-	Pb210		5.484

Nuclide	Potential Parent Nuclides
Tl176	None known
Tl177	None known
Tl178	None known
Tl179	None known
meta state 0.000MeV	None known
Tl180	None known
Tl181	Pb181 (Syn)
Tl182	None known
Tl183	Bi187 (Syn) Bi187m (Syn) Pb183 (Syn) Tl183m (Syn)
meta state 0.550MeV	None known
Tl184	Bi188 (Syn) Pb184 (Syn)
Tl185	Bi189 (Syn) Bi189m (Syn)
meta state 0.454MeV	None known
Tl186	Bi190 (Syn) Bi190m (Syn)
meta state 0.374MeV	None known
Tl187	Bi191 (Syn) Bi191m (Syn) Pb187 (Syn) Pb187m (Syn)
meta state 0.335MeV	None known
Tl188	Bi192 (Syn) Bi192m (Syn) Pb188 (Syn)
meta state 0.000MeV	None known
Tl189	Bi193 (Syn) Bi193m (Syn) Pb189 (Syn) Tl189m (Syn)
meta state 0.281MeV	None known
Tl190	Bi194 (Syn) Bi194m1 (Syn) Pb190 (Syn)
meta state 0.000MeV	None known
Tl191	Bi195 (Syn) Bi195m (Syn) Pb191 (Syn) Pb191m (Syn)
meta state 0.299MeV	None known
Tl192	Bi196 (Syn) Bi196m1 (Syn) Pb192 (Syn)
meta state 0.000MeV	None known
Tl193	Bi197 (Syn) Bi197m (Syn) Pb193 (Syn)
meta state 0.365MeV	None known
Tl194	Pb194 (Syn)
meta state 0.000MeV	None known
Tl195	Bi199m (Syn) Pb195 (Syn) Pb195m (Syn)
meta state 0.482MeV	None known
Tl196	Pb196 (Syn)
meta state 0.394MeV	None known
Tl197	Bi201 (Syn) Bi201m (Syn) Pb197 (Syn) Pb197m (Syn)
meta state 0.608MeV	None known
Tl198	Bi202 (Syn) Pb198 (Syn)
meta state 0.544MeV	None known
meta state 0.742MeV	None known
Tl199	Bi203 (Syn) Pb199 (Syn) Pb199m (Syn)
meta state 0.750MeV	None known
Tl200	Pb200 (Syn)
meta state 0.753MeV	None known
Tl201	Pb201 (Syn) Pb201m (Syn)
meta state 0.920MeV	None known
Tl202	Pb202 (Syn) Pb202m (Syn)
Tl203	Hg203 (Syn) Pb203 (Syn)
Tl204	None known
Tl205	Hg205 (Syn) Pb205 (Syn)
Tl206	Bi210 (Syn) Bi210m (Syn) Hg206 (Syn)
meta state 2.643MeV	None known
Tl207	Bi211 (Syn) Hg207 (Syn)
meta state 1.348MeV	None known
Tl208	Bi212 (Syn) Bi212m (Syn)
Tl209	Bi213 (Syn)
Tl210	Bi214 (Syn)
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

Tl - Thallium

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