Liste der Isotope/Ordnungszahl 91 bis Ordnungszahl 100

Liste der Isotope ist die Übersichtsseite, um komfortabel auf alle Elemente zugreifen zu können. Dort wird auch der Aufbau erklärt und die Legende zur Tabelle ist auch dort zu finden. Zerfallsenergien wurden mit den angegebenen Massen und dem Masse-Energie-Äquivalent von ${\displaystyle \textstyle \Delta m=931{,}4940954{\frac {\mathrm {MeV} }{\mathrm {u} }}}$ neu berechnet.

₉₁ Protactinium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^212Pa	5,1 ms		(3+)	α = ?
^213Pa	5,3 ms			α = ?
^214Pa	17 ms			α = ?
^215Pa	14 ms	8,17		α
^216Pa	0,20 s	8,10 (?)		α ≈ 98, ε ≈ 2
^217Pa	4,9 ms	8,49		α
^217m1Pa	1,6 ms	10,344		α < 100
^218Pa	0,12 ms	9,79		α
^219Pa	53 ns	10,08	9/2−	α ≈ 100, εβ^+ ≈ 5·10^−9
^220Pa	0,78 µs	9,83 (α), 5,72 (εβ^+)		α ≈ 100, εβ^+ = 3·10^−7
^221Pa	5,9 µs	9,25	9/2−	α
^222Pa	2,9 ms	8,85		α
^223Pa	6,5 ms	8,34		α ≈ 100, εβ^+ < 1,0·10^−3
^224Pa	0,79 s	7,694		α
^225Pa	1,7 s	7,39		α
^226Pa	1,8 min	6,987 (α), 2,834 (εβ^+)		α = 74, εβ^+ = 26
^227Pa	38,3 min	6,580 (α), 1,019 (ε)	(5/2−)	α = 85, ε = 15
^228Pa	22 h	2,148 (εβ^+), 6,265 (α)	3+	εβ^+ = 98,0, α = 2,0
^229Pa	1,50 d	0,316 (ε), 5,841 (α)	(5/2+)	ε ≈ 100, α = 0,48
^230Pa	17,4 d	1,310 (εβ^+), 0,563 (β^−), 5,439 (α)	(2−)	εβ^+ = 91,6, β^− = 8,4, α = 0,0032
^231Pa	32760 a	5,149 (α), 51,843 (^23F), 60,41 (^24Ne)	3/2−	α ≈ 100, SF < 1,6·10^−11, ^23F = 1·10^−12, ^24Ne = 6·10^−10
^232Pa	1,31 d	1,337 (β^−), 0,495 (ε)	(2−)	β^− ≈ 100, ε = 0,003
^233Pa	26,967 d	0,571	3/2−	β^−
^234Pa	6,70 h	2,197	4+	β^− ≈ 100, SF < 3·10^−10
^234m1Pa	1,17 min	2,271 (β^−), 0,074 (ε)	(0−)	β^− ≈ 100, IT = 0,16, SF < 1·10^−9
^235Pa	24,5 min	1,41	(3/2−)	β^−
^236Pa	9,1 min	2,9	1(−)	β^−
^237Pa	8,7 min	2,25	(1/2+)	β^−
^238Pa	2,3 min	3,46 (β^−)	(3−)	β^− ≈ 100, SF < 2,6·10^−6

₉₂ Uran

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^217U	80 µs	8,79	0+	α
^218U	600 µs	8,79	0+	α
^219U	55 µs	9,9		α = ?
^220U	60 ns		0+
^221U	700 ns
^222U	1,5 µs	9,5	0+	α
^223U	21 µs	8,94		α = ?
^224U	0,94 ms	8,62	0+	α
^225U	61 ms	8,02		α
^226U	0,269 s	7,715	0+	α
^227U	1,1 min	7,211 (α)	(3/2+)	α ≈ 100, εβ^+ < 0,001
^228U	9,1 min	6,804 (α), 0,307 (ε)	0+	α > 95, ε < 5
^229U	58 min	1,309 (εβ^+), 6,475 (α)	(3/2+)	εβ^+ ≈ 80, α ≈ 20
^230U	20,23 d	5,993 (α), 61,387 (^22Ne)	0+	α ≈ 100, SF < 1,4·10^−10, ^22Ne = 5·10^−11
^231U	4,2 d	0,36 (ε), 5,55 (α)	(5/2−)	ε ≈ 100, α ≈ 0,0055
^232U	68,9 a	5,414 (α), 62,309 (^24Ne), 74,318 (^28Mg)	0+	α ≈ 100, ^24Ne = 1,89·10^−10, ^28Mg = 1,2·10^−11
^233U	1,592·10^5 a	4,909 (α), 60,485 (^24Ne), 60,776 (^25Ne), 74,225 (^28Mg)	5/2+	α ≈ 100, SF < 6·10^−11, ^24Ne = 7,4·10^−11, ^25Ne = 7,2·10^−11, ^28Mg = 1,3·10^−13
^234U	2,455·10^5 a	4,859 (α), 58,825 (^24Ne), 59,464 (^26Ne), 74,11 (^28Mg)	0+	α ≈ 100, SF = 1,64·10^−9, ^24Ne = 9·10^−12?, ^26Ne = 9·10^−12?, ^28Mg = 2,2·10^−13	000,0055
^235U	7,038·10^8 a	4,679 (α), 57,362 (^24Ne), 57,756 (^25Ne), 72,158 (^28Mg), 72,485 (^29Mg)	7/2−	α ≈ 100, SF = 7,0·10^−9, ^24Ne = 8·10^−10?, ^25Ne = 8·10^−10?, ^28Mg = 1,8·10^−10?, ^29Mg = 1,8·10^−10?	000,7200
^235m1U	25 min	???	1/2+	IT
^236U	2,342·10^7 a	4,572 (α), 55,944 (^24Ne), 56,744 (^26Ne), 70,564 (^28Mg), 72,303 (^30Mg)	0+	α ≈ 100, SF = 9,4·10^−8, ^24Ne = 9·10^−10?, ^26Ne = 9·10^−10?, ^28Mg = 2·10^−11?, ^30Mg = 2·10^−11?
^237U	6,75 d	0,519	1/2+	β^−
^238U	4,468·10^9 a	4,270 (α)	0+	α ≈ 100, SF = 5,45·10^−5, 2β = 2,2·10^−10	099,2745
^238m1U	225 ns		0+
^238m2U	1 ns
^239U	23,45 min	1,265	5/2+	β^−
^240U	14,1 h	0,338	0+	β^−
^241U
^242U	16,8 min		0+	β^−

₉₃ Neptunium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^225Np	6 ms			α = ?
^226Np	35 ms	8,2		α
^227Np	0,51 s	7,816 (α)		α ≈ 100, εβ^+ ≈ 0,05
^228Np	61,4 s	4,48 (ε), 7,42 (α)		ε = 60, α = 40, εSF = 0,020
^229Np	4,0 min	7,01 (α), 2,56 (ε)		α > 50, ε < 50
^230Np	4,6 min	3,61 (εβ^+), 6,78 (α)		εβ^+ < 97, α > 3
^231Np	48,8 min	1,84 (ε), 6,37 (α)	(5/2)	ε = 98, α = 2
^232Np	14,7 min	2,70	(4+)	εβ^+
^233Np	36,2 min	1,23 (ε), 5,83 (α)	(5/2+)	ε = 100, α < 0,001
^234Np	4,4 d	1,81	(0+)	εβ^+
^235Np	396,1 d	0,124 (ε), 5,192 (α)	5/2+	ε ≈ 100, α = 0,00260
^236Np	1,54·10^5 a	0,94 (ε), 0,49 (β^−), 5,02 (α)	(6−)	ε = 87,3, β^− = 12,5, α = 0,16
^236m1Np	22,5 h	1,00 (ε), 0,55 (β^−)	1	ε = 52, β^− = 48
^237Np	2,144·10^6 a	4,959 (α), 74,818 (^30Mg)	5/2+	α ≈ 100, SF < 2·10^−10, ^30Mg = 8·10^−12
^237m1Np	45 ns			α ≈ 100, SF = ?
^238Np	2,117 d	1,292	2+	β^−
^238m1Np	112 ns
^239Np	2,3565 d	0,722	5/2+	β^−
^240Np	61,9 min	2,20	(5+)	β^−
^240m1Np	7,22 min	2,20 (β^−), 0 (IT)	1(+)	β^− ≈ 100, IT = 0,11
^241Np	13,9 min	1,31	(5/2+)	β^−
^242Np	5,5 min	2,70	(6)	β^−
^242m1Np	2,2 min	2,70	(1+)	β^−
^243Np	1,8 min	2,17	(5/2−)	β^−
^244Np	2,29 min		(7−)	β^−

₉₄ Plutonium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^228Pu	4 ms	7,95	0+	α
^229Pu	90 s			α
^230Pu	1,7 min	7,175 (α)	0+	α < 100, εβ^+ > 0
^231Pu	8,6 min			εβ^+ = ?, α = ?
^232Pu	34,1 min	1,06 (εβ^+), 6,716 (α)	0+	ε = 77, α = 23
^233Pu	20,9 min	1,90 (εβ^+), 6,42 (α)		εβ^+ ≈ 100, α = 0,12
^234Pu	8,8 h	0,388 (εβ^+), 6,31 (α)	0+	ε ≈ 94, α ≈ 6
^234m1Pu	3 ns
^235Pu	25,3 min	1,17 (εβ^+), 6,00 (α)	(5/2+)	εβ^+ ≈ 100, α = 0,0027
^235m1Pu	25 ns
^236Pu	2,858 a	5,867 (α), 79,669 (^28Mg)	0+	α ≈ 100, SF = 1,37·10^−7, ^28Mg = 8·10^−12
^236m1Pu	37·10^−12 s		(0+)
^236m2Pu	34 ns
^237Pu	45,2 d	0,22 (ε), 5,75 (α)	7/2−	ε ≈ 100, α = 0,0042
^237m1Pu	0,18 s	0,146 (IT)	1/2+	IT
^237m2Pu	85 ns			SF ≤ 100
^237m3Pu	1,1 µs			SF ≤ 100
^238Pu	87,74 a	5,593 (α), 75,911 (^28Mg), 76,823 (^30Mg), 76,823 (^32Si)	0+	α ≈ 100, SF = 1,85·10^−7, ^28Mg ≈ 6·10^−15?, ^30Mg ≈ 6·10^−15?, ^32Si ≈ 1,4·10^−14
^238m1Pu	0,6 ns			SF ≤ 100
^238m2Pu	6,0 ns		(0+)	SF ≤ 100
^239Pu	24110 a	5,245 (α)	1/2+	α ≈ 100, SF = 3,0·10^−10
^239m1Pu	7,5 µs		(5/2+)
^239m2Pu	2,6 ns		(9/2−)
^240Pu	6563 a	5,256 (α), 91,191(^34Si)	0+	α ≈ 100, SF = 5,75·10^−6, ^34Si = 1,1·10^−12
^240m1Pu	3,7 ns		0+	SF > 0
^241Pu	14,35 a	0,021 (β^−), 5,140 (α)	5/2+	β^− ≈ 100, α = 0,0025, SF ≈ 2,4·10^−14
^241m1Pu	21 µs			SF > 0
^241m2Pu	32 ns
^242Pu	3,733·10^5 a	4,984 (α)	0+	α ≈ 100, SF = 5,54·10^−4
^243Pu	4,956 h	0,528	7/2+	β^−
^243m1Pu	45 ns
^244Pu	8,00·10^7 a	4,666 (α)	0+	α = 99,879, SF = 0,121, 2β < 3·10^−11	100
^244m1Pu	0,4 ns		0+	SF ≤ 100
^245Pu	10,5 h	1,205	(9/2−)	β^−
^245m1Pu	90 ns
^246Pu	10,84 d	0,401	0+	β^−
^247Pu	2,27 d			β^−

₉₅ Americium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^232Am	79 s	? (ε), 7,2 (α)		ε ≈ 98, α ≈ 2, εSF = 0,069
^233Am		4,17 (εβ^+), 6,87 (α)		εβ^+ ≈ 100, α = 0,04
^234Am	2,32 min			ε ≈ 100, α = 0,039, εSF = 0,0066
^235Am	15 min			εβ^+ = ?, α = ?
^236Am		3,28 (ε), 6,45 (α)		ε = ?, α = ?
^237Am	73,0 min	1,73 (ε), 6,25 (α)	5/2(−)	ε ≈ 100, α = 0,025
^237m1Am	5 ns			SF = ?
^238Am	98 min	2,26 (εβ^+), 6,04 (α)	1+	εβ^+ ≈ 100, α = 1,0·10^−4
^238m1Am	35 µs
^239Am	11,9 h	0,803 (ε), 5,924 (α)	(5/2)−	ε ≈ 100, α = 0,010
^239m1Am	163 ns		(7/2+)
^240Am	50,8 h	1,379 (ε), 5,710 (α)	(3−)	ε = 100, α = 1,9·10^−4
^240m1Am	0,924 ms			SF = ?
^241Am	432,2 a	5,638 (α), 93,927 (^34Si)	5/2−	α ≈ 100, SF = 4,3·10^−10, ^34Si = 5·10^−13
^241m1Am	1,2 µs
^242Am	16,02 h	0,665 (β^−), 0,751 (ε)	1−	β^− = 82,7, ε = 17,3
^242m1Am	141 a	0,049 (β^−), 5,637 (α)	5−	IT ≈ 100, α = 0,459, SF < 4,7·10^−9
^242m2Am	14,0 ms	2,20 (β^−), 7,788 (α)		SF = ?, IT = ?
^243Am	7370 a	5,438 (α)	5/2−	α ≈ 100, SF = 3,7·10^−9
^243m1Am	5,5 µs
^244Am	10,1 h	1,428 (β^−)	(6−)	β^−
^244m1Am	6,5 µs			SF = ?
^244m2Am	26 min	1,516 (β^−), 0,164 (ε)	1+	β^− ≈ 100, ε = 0,0361
^245Am	2,05 h	0,894	(5/2)+	β^−
^245m1Am	0,64 µs
^246Am	39 min	2,376	(7−)	β^−
^246m1Am	25,0 min	2,376 (β^−), 0 (IT)	2(−)	β^− ≈ 100, IT < 0,01
^246m2Am	73 µs
^247Am	23,0 min	1,7	(5/2)	β^−
^248Am		3,1	(5/2)	β^−

₉₆ Curium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^233Cm	1 min		3/2+
^234Cm	51 s		0+	β^+ = 47, SF = 3
^235Cm	5 min		5/2+
^235pCm
^236Cm	10 min	1,71 (εβ^+), 7,1 (α)	0+	εβ^+ = ?, α = ?
^237Cm	20 min		5/2+	α = ?
^237pCm			7/2−
^238Cm	2,4 h	0,97 (ε), 6,62 (α)	0+	ε = 96,16, α = 3,84
^239Cm	2,9 h	1,7 (ε), 6,46 (α)	(7/2−)	ε ≈ 100, α < 0,1
^240Cm	27 d	6,397 (α), 0,215 (ε)	0+	α ≈ 100, ε < 0,5, SF = 3,9·10^−6
^240m1Cm	10 ps			SF ≤ 100
^240m2Cm	55 ns			SF ≈ 100
^241Cm	32,8 d	0,767 (ε), 6,185 (α)	1/2+	ε ≈ 100, α = 1,0
^241m1Cm	15,3 ns
^242Cm	162,8 d	6,216 (α), 96,51 (^34Si)	0+	α ≈ 100, SF = 6,37·10^−6, ^34Si = 1·10^−14
^242m1Cm	40 ps s
^242m2Cm	0,18 µs	2,80 (IT)		IT = ?, SF = ?
^243Cm	29,1 a	6,196 (α), 0,009 (ε)	5/2+	α ≈ 100, ε = 0,29 , SF = 5,3·10^−9
^243m1Cm	42 ns
^244Cm	18,10 a	5,902 (α)	0+	α ≈ 100, SF = 1,371·10^−4
^244m1Cm	34 ms	1,04 (IT)	6+	IT = 100, SF < 7,7·10^−10
^245Cm	8500 a	5,623 (α)	7/2+	α ≈ 100, SF = 6,1·10^−7
^245m1Cm	13,2 ns
^246Cm	4730 a	5,475 (α)	0+	α ≈ 100, SF = 0,0263
^247Cm	1,56·10^7 a	5,353	9/2−	α
^248Cm	3,40·10^5 a	5,162 (α)	0+	α = 91,61, SF = 8,39
^249Cm	64,15 min		1/2(+)	β^−
^250Cm	9000 a	5,169 (α), 0,90 (β^−)	0+	SF ≈ 86, α ≈ 8, β^− ≈ 6
^251Cm	16,8 min	1,42	(1/2+)	β^−
^252Cm	2 d		0+	β^−

₉₇ Berkelium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^238Bk	144 s	5,0 (εβ^+)		εβ^+ ≈ 100, εSF = 0,048
^239Bk			(7/2+)
^240Bk	4,8 min	3,94 (εβ^+)		εβ^+ ≈ 100, εSF = 1·10^−3
^241Bk			(7/2+)
^242Bk	7,0 min	3,0 (εβ^+)		εβ^+ ≈ 100, SF > 0
^242m1Bk	9,5 ns
^242m2Bk	0,60 µs
^243Bk	4,5 h	1,508 (ε), 6,874 (α)	(3/2−)	ε ≈ 100, α ≈ 0,15
^243m1Bk	5 ns
^244Bk	4,35 h	2,26 (ε), 6,78 (α)	(1−)	ε ≈ 100, α = 0,006
^244m1Bk	820 ns			SF ≤ 100
^245Bk	4,94 d	0,81 (ε), 6,455 (α)	3/2−	ε ≈ 100, α = 0,12
^245m1Bk	2 ns
^246Bk	1,80 d	1,35 (ε), 6,07 (α)	2(−)	ε = 100, α < 0,2
^247Bk	1380 a	5,889	(3/2−)	α < 100
^248Bk	9 a	5,803	(6+)	α > 70
^248m1Bk	23,7 h	0,87 (β^−), 0,717 (ε), 5,803 (α)	1(−)	β^− = 70, ε = 30, α < 0,001
^249Bk	320 d	0,125 (β^−), 5,526 (α)	7/2+	β^− ≈ 100, α = 0,00145, SF = 4,76·10^−8
^250Bk	3,217 h	1,78	2−	β^−
^251Bk	55,6 min	1,093 (β^−), 5,57 (α)	(3/2−)	β^− ≈ 100, α ≈ 1·10^−5

₉₈ Californium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^237Cf	2,1 s			SF ≈ 10
^238Cf	21 ms		0+	SF ≈ 100
^239Cf	39 s	7,81 (α), 3,9 (ε)		α > 50, ε < 50
^240Cf	1,06 min	7,719 (α)	0+	α ≈ 87, SF ≈ 13
^241Cf	3,78 min	3,3 (ε), 7,66 (α)		ε ≈ 75, α ≈ 25
^242Cf	3,49 min	7,516 (α)	0+	α = 65, SF < 1,4·10^−2
^243Cf	10,7 min	2,22 (ε), 7,39 (α)	(1/2+)	ε ≈ 86, α ≈ 14
^244Cf	19,4 min	7,329	0+	α = 70
^245Cf	45,0 min	1,569 (ε), 7,256 (α)	(5/2+)	ε = 64, α = 36
^246Cf	35,7 h	6,862 (α), 0,12 (ε)	0+	α ≈ 100, SF = 2,3·10^−4, ε < 5·10^−4
^246m1Cf	45 ns
^247Cf	3,11 h	0,646 (ε), 6,527 (α)	(7/2+)	ε ≈ 100, α = 0,035
^248Cf	333,5 d	6,361 (α)	0+	α ≈ 100, SF = 0,0029
^249Cf	351 a	6,295 (α)	9/2−	α ≈ 100, SF = 4,4·10^−7
^250Cf	13,08 a	6,176 (α)	0+	α ≈ 100, SF = 0,077
^251Cf	898 a	6,176 (α)	1/2+	α
^252Cf	2,645 a	6,217 (α)	0+	α = 96,908, SF = 3,092
^253Cf	17,81 d	0,285 (β^−), 6,124 (α)	(7/2+)	β^− = 99,69, α = 0,31
^254Cf	60,5 d	5,926 (α)	0+	SF = 99,69, α = 0,31
^255Cf	85 min	0,7	(9/2+)	β^−
^256Cf	12,3 min	5,6 (α)	0+	SF = 100, β^− < 1, α ≈ 1·10^−6

₉₉ Einsteinium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^241Es	9 s			α
^242Es	40 s	5,6 (ε)		α ≈ 100, εSF = 1,4
^243Es	21 s	4,0 (ε), 8,072 (α)		ε < 70, α > 30
^244Es	37 s	4,56 (ε), 7,95 (α)		ε = 96, α = 4, εSF = 0,01
^245Es	1,1 min	3,05 (ε), 7,909 (α)	(3/2−)	ε = 60, α = 40
^246Es	7,7 min	3,88 (ε), 7,74 (α)	(4−, 6+)	ε = 90,1, α = 9,9, εSF = 0,003
^247Es	4,55 min	2,48 (ε), 7,49 (α)	(7/2+)	ε ≈ 93, α ≈ 7
^248Es	27 min		(2−, 0+)	ε ≈ 100, α ≈ 0,25, εSF = 3·10^−5
^249Es	102,2 min	1,45 (ε), 6,94 (α)	7/2(+)	ε ≈ 100, α = 0,57
^250Es	8,6 h	2,10 (ε), 6,88 (α)	(6+)	ε > 97, α < 3
^250m1Es	2,22 h	2,10 (ε), 6,88 (α)	1(−)	ε ≈ 100, α < 1
^251Es	33 h	0,376 (ε), 6,597 (α)	(3/2−)	ε ≈ 100, α = 0,49
^252Es	471,7 d	6,76 (α), 1,26 (ε), 0,48 (β^−)	(5−)	α = 76, ε = 24, β^− ≈ 0,01
^253Es	20,47 d	6,739 (α)	7/2+	α ≈ 100, SF = 8,9·10^−6
^254Es	275,7 d	6,628 (α), 0,654 (ε), 1,09 (β^−)	(7+)	α ≈ 100, ε < 1·10^−4, β^− = 1,74·10^−6, SF < 3·10^−6
^254m1Es	39,3 h	1,168 (β^−), 0,078 (IT), 6,696 (α), 0,732 (ε)	2+	β^− ≈ 100, α = 0,33, IT < 3, ε = 0,078, SF < 0,045
^255Es	39,8 d	0,288 (β^−), 6,436 (α)	(7/2+)	β^− = 92,0, α = 8,0, SF = 0,0045
^256Es	25,4 min	1,67	(1+)	β^−
^256m1Es	7,6 h	1,67 (β^−)	(8+)	β^− ≈ 100, SF = 0,002
^257Es	7,8 d			SF = ?, β^− = ?

₁₀₀ Fermium

Iso­top	Halb­werts­zeit	Zerfalls­energie (MeV)	Spin / Parität	Zerfalls­art(en) (%)	Masse (u)
^242Fm	0,8 ms		0+	SF
^243Fm	0,18 s	8,69 (α)		α < 100, SF < 0,5, ε = ?
^244Fm	3,3 ms		0+	SF
^245Fm	4,2 s	8,44 (α)		α ≈ 100, SF < 0,11
^246Fm	1,1 s	8,374 (α), 2,16 (ε)	0+	α = 92, SF = 7,3, ε < 1
^247Fm	35 s	8,19 (α)		α > 50, εβ^+ < 50
^247m1Fm	9,2 s			α < 100
^248Fm	36 s	8,002 (α), 1,6 (ε)	0+	α = 93, ε ≈ 7, SF = 0,10
^249Fm	2,6 min	2,44 (ε), 7,81 (α)	(7/2+)	ε ≈ 85, α ≈ 15
^250Fm	30 min	7,557 (α), 0,8 (ε)	0+	α > 90, ε < 10, SF = 0,0069
^250m1Fm	1,8 s	1,0 (IT)		IT > 80, SF < 8·10^−5
^251Fm	5,30 h	1,474 (ε), 7,425 (α)	(9/2−)	ε = 98,20, α = 1,80
^252Fm	25,39 h	7,153 (α)	0+	α ≈ 100, SF = 0,00232
^253Fm	3,00 d	0,333 (ε), 7,197 (α)	1/2+	ε = 88, α = 12
^254Fm	3,240 h	7,307 (α)	0+	α ≈ 100, SF = 0,0592
^255Fm	20,07 h	7,241 (α)	7/2+	α ≈ 100, SF = 2,3·10^−5
^256Fm	157,6 min	7,027 (α)	0+	SF = 91,9, α = 8,1
^256m1Fm	70 ns			IT > 80, SF = ?
^257Fm	100,5 d	6,864 (α)	(9/2+)	α = 99,790, SF = 0,210
^258Fm	370 µs		0+	SF
^259Fm	1,5 s			SF
^260Fm	4 ms			SF

Quellen

Siehe a​uch Liste d​er Isotope#Weblinks