List of isotopes / atomic number 81 to atomic number 90

The list of isotopes is the overview page for easy access to all elements. The structure is also explained there and the legend for the table can also be found there. Decay energies were recalculated with the given masses and the mass-energy equivalent of . ${\ displaystyle \ textstyle \ Delta m = 931 {,} 4940954 {\ frac {\ mathrm {MeV}} {\ mathrm {u}}}}$

₈₁ thallium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)
¹⁷⁹ Tl	0.16 s	6.86		α ≈ 100
^179m1 Tl	1.4 ms	6.86	(9 / 2−)	α ≈ 100
¹⁸⁰ Tl	0.70 s	6.82 (α), 11.1 (εβ ⁺ )		α =?, εβ ⁺ =?, εSF ≈ 1.0 · 10 ⁻⁴
¹⁸¹ Tl	3.2 s	8.5	(1/2 +)	εβ ⁺ > 0
^181m1 Tl	1.40 ms		(9 / 2−)	IT = 99.60, α = 0.40
¹⁸² Tl	3.1 s	10.1 (εβ ⁺ ), 6.55 (α)	(7+)	εβ ⁺ > 96, α <4
¹⁸³ Tl	6.9 s	7.6	(1/2 +)	εβ ⁺ > 0
^183m1 Tl	53.3 ms	0.550 (IT), 6.85 (α)	(9 / 2−)	IT> 99.990, α <0.010
^183m2 Tl	1.48 µs		(13/2 +)	IT
¹⁸⁴ Tl	11 s	9.2 (εβ ⁺ ), 6.30 (α)	2+	εβ ⁺ = 97.9, α = 2.1
¹⁸⁵ Tl	19.5 s	6.6	(1/2 +)	εβ ⁺ =?
^185m1 Tl	1.83 s	0.454 (IT), 6.554 (α)	(9 / 2−)	IT =?, Α =?
¹⁸⁶ Tl	27.5 s	8.5 (εβ ⁺ ), 5.89 (α)	(7+)	εβ ⁺ ≈ 100, α ≈ 0.006
^186m1 Tl	2.9 s	0.374	(10−)	IT
¹⁸⁷ Tl	51 s	5.9 (εβ ⁺ ), 5.539 (α)	(1/2 +)	εβ ⁺ =?, α =?
^187m1 Tl	15.60 s	0.335 (IT), 6.235 (εβ ⁺ ), 5.874 (α)	(9 / 2−)	IT =?, Εβ ⁺ =?, Α =?
¹⁸⁸ Tl	71 s	7.8	(2−)	εβ ⁺
^188m1 Tl	71 s	7.8	(7+)	εβ ⁺
^188m2 Tl	41 ms		(9−)	IT
¹⁸⁹ Tl	2.3 min	5.18	(1/2 +)	εβ ⁺
^189m1 Tl	1.4 min	5.461 (εβ ⁺ ), 0.281 (IT)	(9 / 2−)	εβ ⁺ ≈ 100, IT <4
¹⁹⁰ Tl	2.6 min	7.0	(2) -	εβ ⁺
^190m1 Tl	3.7 min	7.0	(7+)	εβ ⁺
¹⁹¹ Tl		4.49	(1/2 +)	εβ ⁺ =?
^191m1 Tl	5.22 min	4,789	9/2 (-)	εβ ⁺
¹⁹² Tl	9.6 min	6.12	(2−)	εβ ⁺
^192m1 Tl	10.8 min	6.12	(7+)	εβ ⁺
¹⁹³ Tl	21.6 min	3.64	1/2 +	εβ ⁺
^193m1 Tl	2.11 min	0.365 (IT), 4.005 (εβ ⁺ )	9 / 2−	IT = 75, εβ ⁺ = 25
¹⁹⁴ Tl	33.0 min	5.28 (εβ ⁺ ), 3.49 (α)	2−	εβ ⁺ ≈ 100, α <1 · 10 ⁻⁷
^194m1 Tl	32.8 min	5.28	(7+)	εβ ⁺
¹⁹⁵ parts	1.16 h	2.81	1/2 +	εβ ⁺
^195m1 Tl	3.6 s	0.483	9 / 2−	IT
¹⁹⁶ Tl	1.84 h	4.38	2−	εβ ⁺
^196m1 Tl	1.41 h	4.774 (εβ ⁺ ) 0.394 (IT)	(7+)	εβ ⁺ = 95.5, IT = 4.5
¹⁹⁷ Tl	2.84 h	2.18	1/2 +	εβ ⁺
^197m1 Tl	0.54 s	0.608	9 / 2−	IT
¹⁹⁸ Tl	5.3 h	3.46	2−	εβ ⁺
^198m1 Tl	1.87 h	4.004 (εβ ⁺ ), 0.544 (IT)	7+	εβ ⁺ = 54, IT = 46
^198m2 Tl	32.1 ms	0.742	(10−)	IT
¹⁹⁹ Tl	7.42 h	1.44	1/2 +	εβ ⁺
^199m1 Tl	28.4 ms	0.75	9 / 2−	IT
²⁰⁰ Tl	26.1 h	2,456	2−	εβ ⁺
^200m1 Tl	34.3 ms	0.754	7+	IT
²⁰¹ Tl	72.912 h	0.483	1/2 +	ε
^201m1 Tl	2.035 ms	0.92	(9 / 2−)	IT
²⁰² Tl	12.23 d	1,365	2−	εβ ⁺
^202m1 Tl	572 µs		7+
²⁰³ Tl	stable ^α		1/2 +		029,524
²⁰⁴ Tl	3.78 a	0.764 (β ^- ), 0.347 (ε)	2−	β ^- = 97.10, ε = 2,90
²⁰⁵ Tl	stable ^α		1/2 +		070.476
²⁰⁶ Tl	4.199 min	1.533	0−	β ^-
^206m1 Tl	3.74 min	2.643	(12−)	IT
²⁰⁷ Tl	4.77 min	1.423	1/2 +	β ^-
^207m1 Tl	1.33 s	1,348	11 / 2−	IT = 100, β ^- <0.1
²⁰⁸ Tl	3.053 min	5.001	5 (+)	β ^-
²⁰⁹ Tl	2.20 min	3.98	(1/2 +)	β ^-
²¹⁰ Tl	1.30 min	5.484 (β ^- ), 0.299 (β ^- n)	(5+)	β ^- ≈ 100, β ^- n = 0.007 ${\ displaystyle \ left. ^ {+ 7} _ {- 4} \ right.}$

₈₂ lead

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)
¹⁸¹ Pb	45 ms	7.379 (α), 9.3 (εβ ⁺ )	(13/2 +)	α ≈ 98, εβ ⁺ ≈ 2
¹⁸² Pb	55 ms	7.076	0+	α <= 100
¹⁸³ Pb	300 ms	7.03 (α), 8.7 (εβ ⁺ )	(1 / 2−)	α ≈ 94, εβ ⁺ ≈ 6
¹⁸⁴ Pb	0.55 s	6.775 (α), 6.0 (εβ ⁺ )	0+	α =?, εβ ⁺ =?
¹⁸⁵ Pb	4.1 s	6.68		α <100
¹⁸⁶ Pb	4.83 s	6.471 (α)	0+	α = 54, εβ ⁺ = 46
¹⁸⁷ Pb	18.3 s	7.2 (εβ ⁺ ), 6.395 (α)	(13/2 +)	εβ ⁺ = 98.0, α = 2.0
^187m1 Pb	15.2 s	7.2 (εβ ⁺ ), 6.395 (α)		εβ ⁺ =?, α =?
¹⁸⁸ Pb	24 s	4.8 (εβ ⁺ ), 6.111 (α)	0+	εβ ⁺ = 91.5, α = 8.5
¹⁸⁹ Pb	51 s	6.7 (εβ ⁺ ), 5.85 (α)		εβ ⁺ > 99, α ≈ 0.4
¹⁹⁰ Pb	1.2 min	4.1 (εβ ⁺ ), 5.698 (α)	0+	εβ ⁺ = 99.79, α = 0.21
¹⁹¹ Pb	1.33 min	5.9 (εβ ⁺ ), 5.41 (α)	(3 / 2−)	εβ ⁺ = 99.987, α = 0.013
^191m1 Pb	2.18 min	6.038 (εβ ⁺ ), 5.548 (α)	(13/2 +)	εβ ⁺ ≈ 100, α ≈ 0.02
¹⁹² Pb	3.5 min	3.4 (εβ ⁺ ), 5.221 (α)	0+	εβ ⁺ = 99.9941, α = 0.0059
¹⁹³ Pb	2 min		(3 / 2−)	εβ ⁺ =?
^193m1 Pb	5.8 min	5.2	(13/2 +)	εβ ⁺
¹⁹⁴ Pb	12.0 min	2.7 (εβ ⁺ ), 4.738 (α)	0+	εβ ⁺ ≈ 100, α = 7.3 · 10 ⁻⁶
¹⁹⁵ Pb	15 minutes	4.5	3 / 2−	εβ ⁺
^195m1 Pb	15.0 min	4.701	13/2 +	εβ ⁺
¹⁹⁶ Pb	37 min	2.05 (εβ ⁺ ), 4.2 (α)	0+	εβ ⁺ ≈ 100, α <3 · 10 ⁻⁵
¹⁹⁷ Pb	8 min	3.58	3 / 2−	εβ ⁺
^197m1 Pb	43 min	3.889 (εβ ⁺ ), 0.319 (IT)	13/2 +	εβ ⁺ = 81, IT = 19
¹⁹⁸ Pb	2.40 h	1.41	0+	εβ ⁺
¹⁹⁹ Pb	90 min	2.88	3 / 2−	εβ ⁺
^199m1 Pb	12.2 min	0.425 (IT), 3.305 (εβ ⁺ )	13/2 +	IT = 93, εβ ⁺ = 7
²⁰⁰ Pb	21.5 h	0.811	0+	ε
²⁰¹ Pb	9.33 h	1.90	5 / 2−	εβ ⁺
^201m1 Pb	61 s	0.629 (IT), 2.529 (εβ ⁺ )	13/2 +	IT> 99, εβ ⁺ <1
²⁰² Pb	5.25 x 10 ⁴ a	0.05 (ε), 2.598 (α)	0+	ε = 100, α <1
^202m1 Pb	3.53 h	2.17 (IT), 2.22 (εβ ⁺ )	9−	IT = 90.5, εβ ⁺ = 9.5
²⁰³ Pb	51.873 h	0.975	5 / 2−	ε
^203m1 Pb	6.3 s	0.825	13/2 +	IT
^203m2 Pb	0.48 s	2.949	29 / 2−	IT
²⁰⁴ Pb	> 1.4 · 10 ¹⁷ a		0+		001.4
^204m1 Pb	67.2 min	2.186	9−	IT
²⁰⁵ Pb	1.53 · 10 ⁷ a	0.051	5 / 2−	ε
^205m1 Pb	5.54 ms	1.014	13/2 +	IT
²⁰⁶ Pb	stable ^α		0+		024.1
²⁰⁷ Pb	stable ^α		1 / 2−		022.1
^207m1 Pb	0.805 s	1.633	13/2 +	IT
²⁰⁸ Pb	stable ^α		0+		052.4
²⁰⁹ Pb	3.253 h	0.644	9/2 +	β ^-
²¹⁰ Pb	22.3 a	0.064 (β ^- ), 3.792 (α)	0+	β ^- ≈ 100, α = 1.9 · 10 ⁻⁶
²¹¹ Pb	36.1 min	1.373	9/2 +	β ^-
²¹² Pb	10.64 h	0.574	0+	β ^-
²¹³ Pb	10.2 min	2.070	(9/2 +)	β ^-
²¹⁴ Pb	26.8 min	1.024	0+	β ^-
²¹⁵ Pb	36 s		(5/2 +)	β ^-

₈₃ bismuth

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)
^184m Bi	13 ms		?	α ≈ 100
¹⁸⁵ bi	58 µs		1/2 +	p ≈ 90, α ≈ 10
¹⁸⁶ bi	14.8 ms		(3+)	α ≈ 100
^186m1 bi	9.8 ms		(10−)	α ≈ 100
¹⁸⁷ bi	35 ms	7.69	(9 / 2−)	α> 50
^187m1 bi	370 µs	7.75	(1/2 +)	α ≈ 100
¹⁸⁸ Bi	265 ms	7.27	(10-)	α ≈ 100
^188m1 bi	60 ms		(3+)	α ≈ 100
¹⁸⁹ bi	674 ms	7.27 (α), 8.0 (εβ ⁺ )	(9 / 2−)	α> 50, εβ ⁺ <50
^189m1 bi	5 ms	7.362 (α), 8.092 (εβ ⁺ )	(1/2 +)	α> 50, εβ ⁺ <50
¹⁹⁰ bi	6.3 s	6.862 (α), 9.6 (εβ ⁺ )	(3+)	α = 90, εβ ⁺ = 10
^190m1 bi	6.2 s	6.862 (α), 9.6 (εβ ⁺ )	(10−)	α = 70, εβ ⁺ = 30
¹⁹¹ bi	12.4 s	6.781 (α), 7.3 (εβ ⁺ )	(9 / 2−)	α = 51, εβ ⁺ = 49
^191m1 bi	125 ms	7.023 (α)	(1/2 +)	α = 68, IT = 32
¹⁹² bi	34.6 s	9.0 (εβ ⁺ ), 6.376 (α)	(3+)	εβ ⁺ = 88, α = 12
^192m1 bi	39.6 s	9.105 (εβ ⁺ ), 6.481 (α)	(10−)	εβ ⁺ = 90, α = 10
¹⁹³ bi	63.6 s	6.5 (εβ ⁺ ), 6.305 (α)	(9 / 2−)	εβ ⁺ = 96.5, α = 3.5
^193m1 bi	3.2 s	6.612 (α), 6.807 (εβ ⁺ )	(1/2 +)	α = 84, εβ ⁺ = 16
¹⁹⁴ bi	95 s	8.2 (εβ ⁺ ), 5.918 (α)	(3+)	εβ ⁺ = 99.54, α = 0.46
^194m1 bi	115 s	8.2 (εβ ⁺ ), 5.918 (α)	(10−)	εβ ⁺ = 99.80, α = 0.20
^194m2 Bi	125 s	8.2 (εβ ⁺ ), 5.918 (α)	(6 +, 7 +)	εβ ⁺ = 100
¹⁹⁵ bi	183 s	5.9 (εβ ⁺ ), 5.833 (α)	(9 / 2−)	εβ ⁺ = 99.97, α = 0.03
^195m1 bi	87 s	6.301 (εβ ⁺ ), 6.234 (α)	(1/2 +)	εβ ⁺ = 67, α = 33
¹⁹⁶ bi	308 s	7.36 (εβ ⁺ ), 5.46 (α)	(3+)	εβ ⁺ ≈ 100, α = 0.001
^196m1 bi	0.6 s		(7+)	εβ ⁺ , IT
^196m2 Bi	240 s	7.629 (εβ ⁺ ), 0.269 (IT)	(10−)	εβ ⁺ = 74.2, IT = 25.8, α = 0.00038
¹⁹⁷ bi	9.33 min	5.2 (εβ ⁺ ), 5.39 (α)	(9 / 2−)	εβ ⁺ ≈ 100, α = 1 · 10 ⁻⁴
^197m1 bi	5.04 min	5.89 (α), 5.7 (εβ ⁺ ), 0.50 (IT)	(1/2 +)	α = 55, εβ ⁺ = 45, IT <0.3
¹⁹⁸ bi	10.3 min	6.56	(2+, 3+)	εβ ⁺
^198m1 bi	11.6 min	6.56	(7+)	εβ ⁺
^198m2 Bi	7.7 s	0.249	(10−)	IT
¹⁹⁹ bi	27 min	4.34	9 / 2−	εβ ⁺
^199m1 bi	24.70 min	5.02 (εβ ⁺ ), 5.64 (α)	(1/2 +)	εβ ⁺ ≈ 99, α ≈ 1
²⁰⁰ bi	36.4 min	5.89	7+	εβ ⁺
^200m1 bi	31 min	5.89 (εβ ⁺ ), 0.0 (IT)	(2+)	εβ ⁺ > 90, IT <10
^200m2 Bi	0.40 s	0.428	(10−)	IT
²⁰¹ bi	108 min	3.84 (εβ ⁺ ), 4.5 (α)	9 / 2−	εβ ⁺ ≈ 100, α <1 · 10 ⁻⁴
^201m1 bi	59.1 min	4.686 (ε), 5.346 (IT), 5.346 (α)	1/2 +	ε> 93, IT <6.8, α ≈ 0.3
²⁰² bi	1.72 h	5.15 (εβ ⁺ ), 4.29 (α)	5+	εβ ⁺ ≈ 100, α <1 · 10 ⁻⁵
²⁰³ bi	11.76 h	3.253 (εβ ⁺ ), 4.15 (α)	9 / 2−	εβ ⁺ ≈ 100, α ≈ 1 · 10 ⁻⁵
^203m1 bi	303 ms	1.098	1/2 +	IT
²⁰⁴ bi	11.22 h	4,438	6+	εβ ⁺
^204m1 bi	13.0 ms	0.805	10−	IT
^204m2 Bi	1.07 ms	2.833	(17+)	IT
²⁰⁵ bi	15.31 d	2.708	9 / 2−	εβ ⁺
²⁰⁶ bi	6.243 d	3.758	6 (+)	εβ ⁺
²⁰⁷ bi	31.55 a	2,399	9 / 2−	εβ ⁺
²⁰⁸ Bi	3.68e⁵ a	2,880	(5) +	εβ ⁺
^208m1 bi	2.58 ms	1.571	(10) -	IT
²⁰⁹ bi	1.9e¹⁹ a	3.137	9 / 2−	α	100
²¹⁰ bi	5.013 d	1.163 (β ^- ), 5.037 (α)	1−	β ^- ≈ 100
^210m1 bi	3.04e⁶ a	5.308	9−	α
²¹¹ bi	2.14 min	6.751 (α), 0.579 (β ^- )	9 / 2−	α = 99.724, β ^- = 0.276
²¹² bi	60.55 min	2.254 (β ^- ), 6.207 (α), 11.208 (β ^- + α)	1 (-)	β ^- = 64.06, α = 35.94
^212m1 bi	25.0 min	6.457 (α), 2.504 (β ^- )	(9−)	α = 67, β ^- = 33, β ^- α = 30
^212m2 Bi	7.0 min	4.164		β ^- ≈ 100
²¹³ bi	45.59 min	1.464 (β ^- ), 5.982 (α)	9 / 2−	β ^- = 97.91, α = 2.09
²¹⁴ Bi	19.9 min	3.272 (β ^- ), 5.617 (α)	1−	β ^- = 99.979, α = 0.021
²¹⁵ bi	7.6 min	2.25		β ^-
²¹⁶ bi	3.6 min	4.0	(1−)	β ^- ≈ 100
²¹⁷ bi	97 p		(9 / 2−)	β ^-

₈₄ polonium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)
¹⁹⁰ Po	2.0 ms	7.643 (α)	0+	α = 99.9, εβ ⁺ = 0.1
¹⁹¹ Po	15.5 ms	7.471		α =?
¹⁹² Po	0.0332 s	7.32 (α), 5.7 (εβ ⁺ )	0+	α ≈ 99, εβ ⁺ ≈ 1
¹⁹³ Po	0.42 s	7.10	(3 / 2−)	α =?
^193m1 Po	0.24 s		(13/2 +)	α =?
¹⁹⁴ Po	0.392 s	6,987	0+	α = 93
¹⁹⁵ Po	4.64 s	6.75 (α), 6.8 (εβ ⁺ )	(3 / 2−)	α = 75, εβ ⁺ = 25
^195m1 Po	1.92 s	6.98 (α), 7.03 (εβ ⁺ ), 0.23 (IT)	(13/2 +)	α ≈ 90, εβ ⁺ ≈ 10, IT <0.01
¹⁹⁶ Po	5.8 s	6.657 (α), 4.6 (εβ ⁺ )	0+	α ≈ 98, εβ ⁺ ≈ 2
¹⁹⁷ Po	53.6 s	6.2 (εβ ⁺ ), 6.41 (α)	(3 / 2−)	εβ ⁺ = 56, α = 44
^197m1 Po	25.8 s	6.614 (α), 6.614 (εβ ⁺ ), 0.204 (IT)	(13/2 +)	α = 84, εβ ⁺ = 16, IT = 0.01
¹⁹⁸ Po	1.77 min	6.309 (α), 4.02 (εβ ⁺ )	0+	α = 57, εβ ⁺ = 43
¹⁹⁹ Po	5.48 min	5.6 (εβ ⁺ ), 6.074 (α)	3 / 2−	εβ ⁺ = 88, α = 12
^199m1 Po	4.13 min	5.91 (εβ ⁺ ), 6.384 (α), 0.310 (IT)	13/2 +	εβ ⁺ = 59, α = 39, IT = 2.1
²⁰⁰ po	11.5 min	3.35 (εβ ⁺ ), 5.982 (α)	0+	εβ ⁺ = 88.9, α = 11.1
²⁰¹ Po	15.3 min	4.88 (εβ ⁺ ), 5.799 (α)	3 / 2−	εβ ⁺ = 98.4, α = 1.6
^201m1 Po	8.9 min	0.424 (IT), 5.304 (εβ ⁺ ), 6.223 (α)	13/2 +	IT = 56, ε = 41, α ≈ 2.9
²⁰² Po	44.7 min	2.82 (εβ ⁺ ), 5.701 (α)	0+	εβ ⁺ = 98.08, α = 1.92
^202m1 Po	85 ns		8+
^202m2 Po	200 ns		11−
^202m3 Po	19 ns		12+
^202m4 Po	11 ns		(15−)
²⁰³ Po	36.7 min	4.23 (εβ ⁺ ), 5.496 (α)	5 / 2−	εβ ⁺ = 99.89, α = 0.11
^203m1 Po	45 s	0.641 (IT), 6.137 (α)	13/2 +	IT ≈ 100, α ≈ 0.04
²⁰⁴ Po	3.53 h	2.34 (εβ ⁺ ), 5.485 (α)	0+	εβ ⁺ = 99.34, α = 0.66
²⁰⁵ Po	1.66 h	3.53 (εβ ⁺ ), 5.324 (α)	5 / 2−	εβ ⁺ = 99.96, α = 0.04
^205m1 Po	58 ms		19 / 2−	IT
²⁰⁶ Po	8.8 d	1.846 (εβ ⁺ ), 5.326 (α)	0+	εβ ⁺ = 94.55, α = 5.45
²⁰⁷ Po	5.80 h	2.909 (εβ ⁺ ), 5.216 (α)	5 / 2−	εβ ⁺ = 99.979, α = 0.021
^207m1 Po	2.8 s	1.383	19 / 2−	IT
²⁰⁸ Po	2,898 a	5.215 (α), 1.401 (εβ ⁺ )	0+	α = 99.9958, εβ ⁺ = 0.0042
²⁰⁹ Po	102 a	4.879 (α), 1.893 (εβ ⁺ )	1 / 2−	α = 99.52, εβ ⁺ = 0.48
²¹⁰ Po	138.376 d	5.307	0+	α
²¹¹ Po	0.516 s	7,595	9/2 +	α
^211m1 Po	25.2 s	9.057 (α), 1.462 (IT)	(25/2 +)	α = 99.984, IT = 0.016
²¹² Po	0.299 µs		0+	α
^212m1 Po	45.1 s		(18+)	α = 99.93, IT = 0.07
²¹³ Po	4.2 µs	8.537	9/2 +	α
²¹⁴ Po	164.3 µs	7.833	0+	α
^214m1 Po	99 ps	1.416 (IT), 9.248 (α)	0+	IT = 0.14, α = 99.86
²¹⁵ Po	1.781 ms	7.526 (α), 0.721 (β ^- )	9/2 +	α ≈ 100, β ^- = 2.3 · 10 ⁻⁴
²¹⁶ Po	0.145 s	6,906	0+	α
²¹⁷ Po	10 s			α> 95, β ^- <5
²¹⁸ Po	3.10 min	6.115 (α), 0.265 (β ^- )	0+	α = 99.980, β ^- = 0.020

₈₅ astatine

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)
¹⁹³ at	40 ms			α =?
¹⁹⁴ at	40 ms	7.31		α =?
^194m1 at	250 ms			α =?
¹⁹⁵ at	0.63 s	7.4 (α), 8.0 (εβ ⁺ )		α> 75, εβ ⁺ <25
¹⁹⁶ at	0.253 s	7.2		α ≈ 100
¹⁹⁷ at	0.35 s	7.1 (α), 7.2 (εβ ⁺ )	(9 / 2−)	α = 96, εβ ⁺ = 4
^197m1 at	3.7 s	7.152 (α), 7.252 (εβ ⁺ )	(1/2 +)	α =?, εβ ⁺ =?
¹⁹⁸ at	4.2 s	6.893 (α), 8.8 (εβ ⁺ )	(3+)	α = 90, εβ ⁺ = 10
^198m1 at	1.0 s	6.995 (α), 8.902 (εβ ⁺ )	(10−)	α = 84, εβ ⁺ = 16
¹⁹⁹ at	7.2 s	6.78 (α), 6.6 (εβ ⁺ )	(9 / 2−)	α = 90, εβ ⁺ = 10
²⁰⁰ at	43 p	6.596 (α), 7.97 (εβ ⁺ )	(3+)	α = 57, εβ ⁺ = 43
^200m1 at	47 p	8.074 (εβ ⁺ ), 6.70 (α)	(7+)	εβ ⁺ <57, α = 43
^200m2 at	3.5 s	0.335 (IT), 6.931 (α), 8.305 (εβ ⁺ )	(10−)	IT ≈ 85, α ≈ 10.5, ε ≈ 4.5
²⁰¹ at	89 p	6.473 (εβ ⁺ ), 5.85 (α)	(9 / 2−)	α = 71, εβ ⁺ = 29
²⁰² at	184 s	7.21 (εβ ⁺ ), 6.354 (α)	(2,3) +	εβ ⁺ = 82, α = 18
^202m1 at	182 s	7.21 (εβ ⁺ ), 6.354 (α)	(7+)	εβ ⁺ = 91.3, α = 8.7
^202m2 at	0.46 s	0.392 (IT), 7.602 (α), 6.746 (εβ ⁺ )	(10−)	IT = 99.65, εβ ⁺ = 0.25, α = 0.096
²⁰³ at	7.4 min	5.06 (εβ ⁺ ), 6.21 (α)	9 / 2−	εβ ⁺ = 69, α = 31
²⁰⁴ at	9.2 min	6.48 (εβ ⁺ ), 6.07 (α)	7+	εβ ⁺ = 96.2, α = 3.8
^204m1 at	108 ms	0.587	(10−)	IT
²⁰⁵ at	26.2 min	4.54 (εβ ⁺ ), 6.02 (α)	9 / 2−	εβ ⁺ = 90, α = 10
²⁰⁶ at	30.0 min	5.72 (εβ ⁺ ), 5.888 (α)	(5) +	εβ ⁺ = 99.11, α = 0.89
²⁰⁷ at	1.80 h	3.91 (εβ ⁺ ), 5.873 (α)	9 / 2−	εβ ⁺ = 91.4, α = 8.6
²⁰⁸ at	1.63 h	4.973 (εβ ⁺ ), 5.751 (α)	6+	εβ ⁺ = 99.45, α = 0.55
²⁰⁹ at	5.41 h	3.486 (εβ ⁺ ), 5.757 (α)	9 / 2−	εβ ⁺ = 95.9, α = 4.1
²¹⁰ at	8.1 h	3.981 (εβ ⁺ ), 5.631 (α)	(5) +	εβ ⁺ = 99.825, α = 0.175
²¹¹ at	7.214 h	0.786 (εβ ⁺ ), 5.982 (α)	9 / 2−	ε = 58.2, α = 41.8
²¹² at	0.314 s	7.829 (α), 1.754 (εβ ⁺ ), 0.043 (β ^- )	(1−)	α ≈ 100, εβ ⁺ <0.03, β ^- <2 · 10 ⁻⁶
^212m1 at	0.119 s	8.051 (α), 0.222 (IT)	(9−)	α> 99, IT <1
²¹³ at	125 ns	9.254	9 / 2−	α
²¹⁴ at	558 ns	8,987	1−	α
^214m1 at	265 ns	9,046		α <100
^214m2 at	760 ns	9.218	9−	α <= 100
²¹⁵ at	0.10 ms	8.178	9 / 2−	α
²¹⁶ at	0.30 ms	7.949 (α), 0.469 (ε), 2.003 (β ^- )	1−	α ≈ 100, ε <3 · 10 ⁻⁷ , β ^- <6 · 10 ⁻³
^216m1 at	0.1 ms	8,362	(9−)	α <= 100
²¹⁷ at	32.3 ms	5.982 (α), 0.786 (εβ ⁺ )	9 / 2−	α = 99.988, β ^- = 0.012
²¹⁸ at	1.5 s	6.874 (α), 2.883 (εβ ⁺ )		α = 99.9, β ^- = 0.1
²¹⁹ at	56 s	6.39 (α), 1.70 (εβ ⁺ )		α ≈ 97, β ^- ≈ 3
²²⁰ at	3.71 min	3.65 (εβ ⁺ ), 6.05 (α)	3	α = 8, β ^- = 92
²²¹ at	2.3 min			β ^-
²²² at	54 s	4.4		β ^-
²²³ at	50 s			β ^- ≈ 100, α = 0.008

₈₆ radon

isotope	Half-life	Decay energy ( MeV)	Spin / parity	Type (s) of decay (%)
¹⁹⁶ para	3 ms		0+	α ≈ 100
¹⁹⁷ para	65 ms		(3 / 2−)	α ≈ 100
^{197m1 margin} no	19 ms		(13/2 +)	α
¹⁹⁸ para	64 ms	7.345 (α), 5.6 (εβ ⁺ )	0+	α ≈ 100, εβ ⁺ ≈ 0
¹⁹⁹ para	0.62 s	7.14 (α), 7.2 (εβ ⁺ )	(3 / 2−)	α = 94, εβ ⁺ = 6
^199m1 marg	0.32 s		(13/2 +)	α = 97, εβ ⁺ = 3
²⁰⁰ Rn	0.96 s	7.043 (α), 5.0 (εβ ⁺ )	0+	α = 86 , εβ ⁺ <18 ${\ displaystyle \ left. ^ {+ 14} _ {- 4} \ right.}$
²⁰¹ para	7.0 s	6.86 (α), 6.6 (εβ ⁺ )	(3 / 2−)	α ≈ 80, εβ ⁺ ≈ 20
^{201m1 margin} no	3.8 s	7.14 (α), 6.88 (εβ ⁺ ), 0.28 (IT)	(13/2 +)	α ≈ 90, εβ ⁺ ≈ 10, IT ≈ 0
²⁰² para	10.0 s	6.774 (α), 4.44 (εβ ⁺ )	0+	α = 86, εβ ⁺ = 14
²⁰³ para	45 s	6.63 (α), 6.0 (εβ ⁺ )	(3/2, 5/2) -	α = 66, εβ ⁺ = 34
^203m1 marg	28 p	6.991 (α), 6.361 (εβ ⁺ ), 0.361 (IT)	(13/2 +)	α ≈ 80, εβ ⁺ ≈ 20, IT <0.1
²⁰⁴ para	1.24 min	6.546 (α), 3.82 (εβ ⁺ )	0+	α = 73, εβ ⁺ = 27
²⁰⁵ para	2.8 min	5.24 (εβ ⁺ ), 6.39 (α)	5 / 2−	εβ ⁺ = 77, α = 23
²⁰⁶ para	5.67 min	6.384 (α), 3.31 (εβ ⁺ )	0+	α = 63, εβ ⁺ = 37
²⁰⁷ para	9.25 min	4.61 (εβ ⁺ ), 6.251 (α)	5 / 2−	εβ ⁺ = 79, α = 21
²⁰⁸ para	24.35 min	6.26 (α), 2.85 (εβ ⁺ )	0+	α = 62, εβ ⁺ = 38
²⁰⁹ para	28.5 min	3.93 (εβ ⁺ ), 6.155 (α)	5 / 2−	εβ ⁺ = 83, α = 17
²¹⁰ para	2.4 h	6.159 (α), 2.374 (εβ ⁺ )	0+	α = 96, εβ ⁺ = 4
²¹¹ para	14.6 h	2.892 (εβ ⁺ ), 5.965 (α)	1 / 2−	ε = 72.6, α = 27.4
²¹² para	23.9 min	6.385	0+	α
²¹³ para	25.0 ms	8.243	(9/2 +)	α
²¹⁴ para	0.27 µs	9.208	0+	α
^214m1 marg	0.69 ns	1.443 (IT), 10.651 (α)	6+	IT <100, α> 0
^214m2 marg	6.5 ns	1.625 (IT), 10.833 (α)	8+	IT ≈ 90, α ≈ 10
²¹⁵ para	2.30 µs	8,839	9/2 +	α
²¹⁶ para	45 µs	8.20	0+	α
²¹⁷ para	0.54 ms	7,889	9/2 +	α
²¹⁸ para	35 ms	7.263	0+	α
²¹⁹ para	3.96 s	6,945	5/2 +	α
²²⁰ para	55.6 s	6.405	0+	α
²²¹ para	25 min	1.22 (β ^- ), 6.146 (α)	7/2 (+)	β ^- = 78, α = 22
²²² para	3.8235 d	5.59	0+	α
²²³ para	23.2 min		7/2	β ^- ≈ 100, α = 0.0004
²²⁴ para	107 min	0.8	0+	β ^-
²²⁵ Rn	4.5 min		7 / 2−	β ^-
²²⁶ para	7.4 min	1.4	0+	β ^-
²²⁷ para	22.5 s			β ^-
²²⁸ para	65 s	2.2	0+	β ^-
²²⁹ para	12 s

₈₇ francium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)
²⁰⁰ Fr	19 ms		(3+)	α
^200m1 Fr	0.57 s		(10−)	α
²⁰¹ Fr	48 ms	7.54 (α), 7.9 (εβ ⁺ )	(9 / 2−)	α ≈ 100, εβ ⁺ <1
²⁰² Fr	0.34 s	7.389 (α), 9.4 (εβ ⁺ )	(3+)	α ≈ 97, εβ ⁺ ≈ 3
^202m1 Fr	0.34 s	7.491 (α), 9.502 (εβ ⁺ )	(10−)	α ≈ 97, εβ ⁺ ≈ 3
²⁰³ Fr	0.55 s	7.28 (α), 7.2 (εβ ⁺ )	(9 / 2−)	α ≈ 95, εβ ⁺ ≈ 5
²⁰⁴ Fr	1.7 s	7.17 (α), 8.6 (εβ ⁺ )	(3+)	α ≈ 80, εβ ⁺ ≈ 20
^204m1 Fr	2.6 s	7.211	(7+)	α =?
^204m2 Fr	1 s	7.486 (α), 0.316 (IT)	(10−)	α ≈ 100, IT <1
²⁰⁵ Fr	3.85 s	7.06 (α), 6.52 (εβ ⁺ )	(9 / 2−)	α ≈ 100, εβ ⁺ <1
²⁰⁶ Fr	15.9 s	6.926 (α), 7.75 (εβ ⁺ )	(5+)	α = 84, εβ ⁺ = 16
^206m1 Fr		6,926		α <84
^206m2 Fr	0.7 s	7.576 (α), 0.65 (IT)	(10−)	α = 0.3, IT =?
²⁰⁷ Fr	14.8 s	6.9 (α), 5.71 (εβ ⁺ )	9 / 2−	α = 95, εβ ⁺ = 5
²⁰⁸ Fr	59.1 s	6.77 (α), 6.99 (εβ ⁺ )	7+	α = 90, εβ ⁺ = 10
²⁰⁹ Fr	50.0 s	6.777 (α), 5.16 (εβ ⁺ )	9 / 2−	α = 89, εβ ⁺ = 11
²¹⁰ Fr	3.18 min	6.7 (α), 6.262 (εβ ⁺ )	6+	α = 60, εβ ⁺ = 40
²¹¹ Fr	3.10 min	6.66 (α), 4.605 (εβ ⁺ )	9 / 2−	α> 80, ε <20
²¹² Fr	20.0 min	5.117 (εβ ⁺ ), 6.529 (α)	5+	εβ ⁺ = 57, α = 43
²¹³ Fr	34.6 s	6.905 (α), 2.148 (εβ ⁺ )	9 / 2−	α ≈ 100, εβ ⁺ = 0.55
²¹⁴ Fr	5.0 ms	8,589	(1−)	α
^214m1 Fr	3.35 ms	8,711	(8−)	α
²¹⁵ Fr	86 ns	9,540	9 / 2−	α
^215m1 Fr	3.5 ns		(23/2) -
²¹⁶ Fr	0.70 µs	9.175 (α), 2.729 (ε)	(1−)	α ≈ 100, ε <2 · 10 ⁻⁷
^216m1 Fr	71 ns	0.086	(23/2) -	IT
²¹⁷ Fr	22 µs	8,469	9 / 2−	α
²¹⁸ Fr	1.0 ms	8.014	1−	α
^218m1 Fr	22.0 ms	8.1 (α), 0.086 (IT)		α ≈ 100, IT =?
²¹⁹ Fr	20 ms	7.449	9 / 2−	α
²²⁰ Fr	27.4 s	6.801 (α), 1.209 (β ^- )	1+	α ≈ 100, β ^- = 0.35
²²¹ Fr	4.9 min	6.458 (α), 2.033 (β ^- ), 31.292 ( ¹⁴ C)	5 / 2−	α ≈ 100, β ^- =?, ¹⁴ C = 8.8 · 10 ⁻¹¹
²²² Fr	14.2 min	2.033	2−	β ^-
²²³ Fr	21.8 min	1.149 (β ^- ), 5.43 (α)	3/2 (-)	β ^- ≈ 100, α = 0.006
²²⁴ Fr	3.33 min	2.83	1−	β ^-
²²⁵ Fr	4.0 min	1,866	3 / 2−	β ^-
²²⁶ Fr	49 s	3.67	1−	β ^-
²²⁷ Fr	2.47 min	2.49	1/2 +	β ^-
²²⁸ Fr	38 p	4.34	2−	β ^-
²²⁹ Fr	50 s			β ^-
²³⁰ Fr	19.1 s			β ^-
²³¹ Fr	17.5 s			β ^-
²³² Fr	5 s			β ^-

₈₈ radium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)
²⁰² Ra	0.7 ms		0+	α
²⁰³ ra	1.0 ms		(3 / 2−)	α ≈ 100
^203m1 Ra	33 ms		(13/2 +)	α ≈ 100
²⁰⁴ ra	59 ms	7.65	0+	α ≈ 100
²⁰⁵ Ra	210 ms	7.51 (α), 7.0 (εβ ⁺ )	(3 / 2−)	α =?, εβ ⁺ =?
^205m1 Ra	170 ms		(13/2 +)	α =?
²⁰⁶ Ra	0.24 s	7.416	0+	α ≈ 100
²⁰⁷ Ra	1.3 s	7.27 (α), 6.4 (εβ ⁺ )	(5/2, 3/2) -	α ≈ 90, εβ ⁺ ≈ 10
^207m1 Ra	55 ms	0.47 (IT), 7.74 (α), 6.87 (εβ ⁺ )	(13/2 +)	IT ≈ 85, α ≈ 15, εβ ⁺ ≈ 0.55
²⁰⁸ ra	1.3 s	7.273 (α), 4.33 (εβ ⁺ )	0+	α = 95, εβ ⁺ = 5
²⁰⁹ Ra	4.6 s		5 / 2−	α ≈ 90, εβ ⁺ ≈ 10
²¹⁰ ra	3.7 s	7.157 (α), 3.77 (εβ ⁺ )	0+	α ≈ 96, εβ ⁺ ≈ 4
²¹¹ ra	13 s	7.046 (α), 5.0 (ε)	5/2 (-)	α> 93, ε <7
²¹² ra	13.0 s	6.859 (α), 3.35 (εβ ⁺ )	0+	α ≈ 85, εβ ⁺ ≈ 15
²¹³ ra	2.74 min	6.859 (α), 3.88 (εβ ⁺ )	1 / 2−	α = 80, εβ ⁺ = 20
^213m1 Ra	2.1 ms	1.77 (IT), 8.628 (α)		IT ≈ 99, α ≈ 1
²¹⁴ ra	2.46 s	7.273 (α), 1.059 (ε)	0+	α ≈ 100, ε = 0.059
²¹⁵ ra	1.59 ms	8,864	(9/2 +)	α
²¹⁶ ra	182 ns	9.526 (α), 0.308 (ε)	0+	α ≈ 100, ε <1 · 10 ⁻⁸
^216m1 Ra	<0.2 ns	1.507 (IT), 11.034 (α)	6+	α = 0.58
^216m2 Ra	1.24 ns	1.711 (IT), 11.237 (α)	8+	α = 1.86
^216m3 Ra	0.6 ns	2.026 (IT), 11.552 (α)	10+	α = 0.12
²¹⁷ ra	1.6 µs	9.161	(9/2 +)	α
²¹⁸ ra	25.6 µs	8.546	0+	α
²¹⁹ ra	10 ms	8.130	(7/2) +	α
²²⁰ Ra	18 ms	7,595	0+	α
²²¹ Ra	28 p	6.886 (α), 32.395 ( ¹⁴ C)	5/2 +	α ≈ 100 ¹⁴ C = 1.2 x 10 ^-10
²²² ra	38.0 s	6.681 (α), 33.049 ( ¹⁴ C)	0+	α ≈ 100 ¹⁴ C = 3.0 x 10 ^-8
²²³ ra	11.435 d	5.979 (α), 31.828 ( ¹⁴ C)	3/2 +	α ≈ 100 ¹⁴ C = 6.4 x 10 ^-8
²²⁴ ra	3.66 d	5.789 (α), 30.535 ( ¹⁴ C)	0+	α ≈ 100 ¹⁴ C = 4.3 x 10 ^-9
²²⁵ ra	14.9 d	0.357	1/2 +	β ^-
²²⁶ Ra	1602 a	4.871 (α), 28.196 ( ¹⁴ C)	0+	α ≈ 100 ¹⁴ C = 3.2 x 10 ^-9
²²⁷ ra	42.2 min	1.325	3/2 +	β ^-
²²⁸ ra	5.75 a	0.046	0+	β ^-
²²⁹ Ra	4.0 min	1.76	5/2 (+)	β ^-
²³⁰ Ra	93 min	0.99	0+	β ^-
²³¹ ra	103 s		(7 / 2−, 1/2 +)	β ^-
²³² ra	250 s		0+	β ^-
²³³ ra	30 s			β ^-
²³⁴ ra	30 s		0+	β ^-

₈₉ actinium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)
²⁰⁶ Ac	22 ms		(3+)	α =?
^206m1 Ac	33 ms		(10−)
²⁰⁷ Ac	22 ms		(9 / 2−)	α ≈ 100
²⁰⁸ Ac	95 ms		(3+)	α =?
^208m1 Ac	25 ms		(10−)	α =?
²⁰⁹ Ac	0.10 s	7.73 (α), 7.11 (εβ ⁺ )	(9 / 2−)	α ≈ 99, εβ ⁺ ≈ 1
²¹⁰ Ac	0.35 s	7.61 (α), 8.2 (εβ ⁺ )		α ≈ 96, εβ ⁺ ≈ 4
²¹¹ Ac	0.25 s	7.62		α ≈ 100
²¹² Ac	0.93 s	7.52 (α), 7.48 (εβ ⁺ )		α ≈ 97, εβ ⁺ ≈ 3
²¹³ Ac	0.80 s	7.5		α <100
²¹⁴ Ac	8.2 s	7.35 (α), 6.34 (ε)		α> 89, ε <11
²¹⁵ Ac	0.17 s	7.75 (α), 3.49 (εβ ⁺ )	9 / 2−	α ≈ 100, εβ ⁺ = 0.09
²¹⁶ Ac	0.33 ms	9.243	(1−)	α
^216m1 Ac	0.33 ms	0.037 (IT), 9.28 (α)	(9−)	IT ≈ 100, α ≤ 2
²¹⁷ Ac	69 ns	9.832 (α), 2.819 (εβ ⁺ )	9 / 2−	α ≈ 100, εβ ⁺ <2
^217m1 Ac	740 ns		(29/2) +
²¹⁸ Ac	1.08 µs	9.38	(1−)	α
²¹⁹ Ac	11.8 µs	8.83 (α)	9 / 2−	α ≈ 100, εβ ⁺ ≈ 1 · 10 ⁻⁶
²²⁰ Ac	26.4 ms	8.35 (α), 3.48 (εβ ⁺ )	(3−)	α ≈ 100, εβ ⁺ = 5 · 10 ⁻⁴
²²¹ Ac	52 ms	7.78	(3 / 2−)	α
²²² Ac	5.0 s	7.137 (α), 2.298 (εβ ⁺ )	1−	α = 99, εβ ⁺ = 1
^222m1 Ac	63 s	7.137 (α), 0 (IT), 2.298 (εβ ⁺ )		α> 88, IT <10, εβ ⁺ <0.7
²²³ Ac	2.10 min	6.783 (α), 0.586 (ε), 33.064 ( ¹⁴ C), 39.473 ( ¹⁵ N)	(5 / 2−)	α ≈ 100, ε = 1, ¹⁴ C = 3 · 10 ⁻⁹ , ¹⁵ N = 2 · 10 ⁻¹¹
²²⁴ Ac	2.78 h	1.403 (ε), 6.327 (α), 0.232 (β ^- )	0−	ε = 90.9 , α = 9.1 , β ^- <1.6 ${\ displaystyle \ left. ^ {+ 14} _ {- 10} \ right.}$ ${\ displaystyle \ left. ^ {+ 20} _ {- 14} \ right.}$
²²⁵ Ac	10.0 d	5.935 (α), 30.476 ( ¹⁴ C)	(3 / 2−)	α ≈ 100 ¹⁴ C = 6.0 x 10 ^-10
²²⁶ Ac	29.37 h	1.117 (β ^- ), 0.64 (ε), 5.563 (α)	(1)	β ^- ≈ 83, ε = 17, α = 6 · 10 ⁻³
²²⁷ Ac	21,773 a	0.045 (β ^- ), 5.042 (α)	3 / 2−	β ^- ≈ 100, α = 1.380
²²⁸ Ac	6.15 h	2.127	3+	β ^-
²²⁹ Ac	62.7 min	1.1	(3/2 +)	β ^-
²³⁰ Ac	122 s	2.7	(1+)	β ^-
²³¹ Ac	7.5 min	2.1	(1/2 +)	β ^-
²³² Ac	119 s	3.7	(1+)	β ^-
²³³ Ac	145 s		(1/2 +)	β ^-
²³⁴ Ac	44 s			β ^-

₉₀ thorium

isotope	Half-life	Decay energy (MeV)	Spin / parity	Type (s) of decay (%)	NH (%)
²¹⁰ th	9 ms		0+	α ≈ 100
²¹¹ Th	37 ms			α =?, ε =?
²¹² th	30 ms	7.952 (α), 4.76 (εβ ⁺ )	0+	α ≈ 100, εβ ⁺ ≈ 0.3
²¹³ Th	140 ms	7.84		α <100
²¹⁴ th	100 ms	7.826	0+	α
²¹⁵ th	1.2 s	7.666	(1 / 2−)	α
²¹⁶ Th	0.028 s	8.071 (α), 2.17 (εβ ⁺ )	0+	α ≈ 100, εβ ⁺ ≈ 0.01
^216m1 th	180 µs	2.028 (IT), 10.099 (α)	(8+, 11−)	IT ≈ 97, α ≈ 3
²¹⁷ Th	0.252 ms	9.424	(9/2 +)	α
²¹⁸ Th	109 ns	9,849	0+	α
²¹⁹ Th	1.05 µs	9.51		α ≈ 100, εβ ⁺ ≈ 1 · 10 ⁻⁷
²²⁰ th	9.7 µs	8.953 (α), 0.91 (εβ ⁺ )	0+	α ≈ 100, ε = 2 · 10 ⁻⁷
²²¹ Th	1.68 ms	8,628	(7/2 +)	α
²²² Th	2.8 ms	8.129	0+	α
²²³ Th	0.60 s	7.567	(5/2) +	α
²²⁴ Th	1.05 s	7.304	0+	α
²²⁵ th	8.72 min	6.922 (α), 0.675 (ε)	(3/2) +	α ≈ 90, ε ≈ 10
²²⁶ Th	30.57 min	6.451 (α), 15.3 ( ¹⁸ O)	0+	α ≈ 100 ¹⁸ O = 9.2 x 10 ^-11
²²⁷ Th	18.72 d	0.638 (γ), 6.051 (α)	(1/2 +)	α
²²⁸ Th	1.9116 a	0.087 (γ), 5.520 (α), 44.722 ( ²⁰ O)	0+	α ≈ 100 ²⁰ O = 1.13 x 10 ^-11
²²⁹ Th	7917 a	5.168	5/2 +	α
²³⁰ th	7.538 · 10 ⁴ a	0.2 (γ), 4.770 (α), 57.761 ( ²⁴ Ne)	0+	α ≈ 100 ²⁴ Ne = 5.6 × 10 ^-11 , SF <3.8 × 10 ^-12
²³¹ Th	25.52 h	0.085 (γ), 0.389 (β ^- ), 4.213 (α)	5/2 +	β ^- ≈ 100, α ≈ 1 · 10 ⁻⁸
²³² Th	1.405 x 10 ¹⁰ a	4.083 (α), 0.055 (γ), 54.509 ( ²⁴ Ne), 55.964 ( ²⁶ Ne)	0+	α ≈ 100, SF <1.8 · 10 ⁻⁹ , ²⁴ Ne = 2.8 · 10 ⁻¹⁰ , ²⁶ Ne = 2.8 · 10 ⁻¹⁰	100
²³³ Th	22.3 min	1.245	1/2 +	β ^-
²³⁴ Th	24.10 d	0.09 (γ), 0.273	0+	β ^-
²³⁵ Th	7.1 min	1.93	(1/2 +)	β ^-
²³⁶ Th	37.5 min		0+	β ^-
²³⁷ Th	5.0 min			β ^-

List of isotopes / atomic number 81 to atomic number 90

81 thallium

82 lead

83 bismuth

84 polonium

85 astatine

86 radon

87 francium

88 radium

89 actinium

90 thorium