Isotopes of Magnesium

List of known isotopes of the element Magnesium.

Isotope	t½	%	Spin/parity	Radius	Isotopic mass	Discovery
¹⁸Mg	0.12 ±10 MeV	syn.	0+	—	—	—
¹⁹Mg	1.14·10^-4 eV	syn.	1/2-	—	1.903·10⁷ ±64.41 keV/c²	2007
²⁰Mg	90.4 ±7 ms	syn.	0+	—	2.001·10⁷ ±2 keV/c²	1974
²¹Mg	122 ±3 ms	syn.	5/2+	—	2.101·10⁷ ±0.81 keV/c²	1963
²²Mg	3.875 ±12 s	syn.	0+	—	2.199·10⁷ ±0.17 keV/c²	1961
²³Mg	11.3 ±45 s	syn.	3/2+	—	2.299·10⁷ ±0.034 keV/c²	1939
²⁴Mg	stab.	78.96 ±0.049 %	0+	3.057 ±0.0016 fm	2.398·10⁷ ±0.013 keV/c²	1920
²⁵Mg	stab.	10.01 ±0.013 %	5/2+	3.028 ±0.0022 fm	2.498·10⁷ ±0.05 keV/c²	1920
²⁶Mg	stab.	11.02 ±0.038 %	0+	3.033 ±0.0018 fm	2.598·10⁷ ±0.031 keV/c²	1920
²⁷Mg	9.458 ±12 m	syn.	1/2+	—	2.698·10⁷ ±0.05 keV/c²	1934
²⁸Mg	20.91 ±9 h	syn.	0+	—	2.798·10⁷ ±0.28 keV/c²	1953
²⁹Mg	1.3 ±12 s	syn.	3/2+	—	2.898·10⁷ ±0.369 keV/c²	1971
³⁰Mg	335 ±17 ms	syn.	0+	—	2.999·10⁷ ±1.39 keV/c²	1971
³¹Mg	270 ±2 ms	syn.	1/2+	—	3.099·10⁷ ±3.3 keV/c²	1977
³²Mg	86 ±5 ms	syn.	0+	—	3.199·10⁷ ±3.5 keV/c²	1977
³³Mg	90.5 ±16 ms	syn.	3/2-	—	3.3·10⁷ ±2.859 keV/c²	1979
³⁴Mg	20 ±10 ms	syn.	0+	—	3.4·10⁷ ±7.4 keV/c²	1979
³⁵Mg	11.3 ±6 ms	syn.	(3/2- 5/2-)	—	3.501·10⁷ ±289.5 keV/c²	1989
³⁶Mg	7.6 ± ms	syn.	0+	—	3.602·10⁷ ±741 keV/c²	1989
³⁷Mg	8 ±4 ms	syn.	—	—	3.703·10⁷ ±750.3 keV/c²	1996
³⁸Mg	stab.	syn.	0+	—	3.803·10⁷ ±540 keV/c²	1997
³⁹Mg	180 ns	syn.	—	—	3.904·10⁷ ±551 keV/c²	—
⁴⁰Mg	stab.	syn.	0+	—	4.005·10⁷ ±537 keV/c²	2007

18MgMagnesium-18

Classification	z: 12; n: 6; m: 18
Half life	0.12 ±10 MeV
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	two-proton emission

Point at nuclide Decay chain of Magnesium-18

19MgMagnesium-19

Classification	z: 12; n: 7; m: 19
Half life	1.14·10^-4 eV
Natural abundance	synthetic nuclide
Spin/parity	1/2-
Decay modes	two-proton emission
Discovery	2007
Mass excess	31,830 ±60 keV
Binding energy	5,901 ±3.157 keV
Single-particle energy	488.5 ±111.4 keV
Q value for electron capture	18,900 ±60.91 keV

Point at nuclide Decay chain of Magnesium-19

20MgMagnesium-20

Classification	z: 12; n: 8; m: 20
Half life	90.4 ±7 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁺ decay; β⁺ decay + proton emission
Discovery	1974
Mass excess	17,470 ±1.863 keV
Binding energy	6,728 ±0.0931 keV
Single-particle energy	2,740 ±10.69 keV
Neutron separation energy	22,430 ±60.03 keV
Q value for electron capture	10,620 ±2.168 keV

Point at nuclide Decay chain of Magnesium-20

21MgMagnesium-21

Classification	z: 12; n: 9; m: 21
Half life	122 ±3 ms
Natural abundance	synthetic nuclide
Spin/parity	5/2+
Decay modes	electron capture + β⁺ decay; β⁺ decay + proton emission; β⁺ decay + α decay
Discovery	1963
Mass excess	10,900 ±0.755 keV
Binding energy	7,105 ±0.0359 keV
Single-particle energy	3,235 ±1.341 keV
Neutron separation energy	14,640 ±2.01 keV
Q value for electron capture	13,080 ±0.756 keV
β⁻ decay energy	-16,190 ±600 keV
Magnetic dipole moment	-0.983 ±0.007 μN

Point at nuclide Decay chain of Magnesium-21

22MgMagnesium-22

Classification	z: 12; n: 10; m: 22
Half life	3.875 ±12 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1961
Mass excess	-400 ±0.159 keV
Binding energy	7,662 ±0.0072 keV
Single-particle energy	5,504 ±0.1648 keV
Neutron separation energy	19,370 ±0.7711 keV
Q value for electron capture	4,781 ±0.207 keV
β⁻ decay energy	-18,610 ±401 keV
β⁻ decay energy with neutron	-35,570 ±600 keV

Point at nuclide Decay chain of Magnesium-22

23MgMagnesium-23

Classification	z: 12; n: 11; m: 23
Half life	11.3 ±45 s
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	electron capture + β⁺ decay
Discovery	1939
Mass excess	-5,474 ±0.032 keV
Binding energy	7,901 ±0.0014 keV
Single-particle energy	7,581 ±0.1355 keV
Neutron separation energy	13,140 ±0.1624 keV
Q value for electron capture	4,056 ±0.032 keV
β⁻ decay energy	-12,230 ±0.3461 keV
β⁻ decay energy with neutron	-31,750 ±401 keV
Magnetic dipole moment	-0.5363 ±2.999·10^-4 μN
Electric quadrupole moment	0.114 ±0.003 b

Point at nuclide Decay chain of Magnesium-23

24MgMagnesium-24

Classification	z: 12; n: 12; m: 24
Half life	stable nuclide
Natural abundance	78.96 ±0.049 %
Spin/parity	0+
Discovery	1920
Mass excess	-13,940 ±0.013 keV
Binding energy	8,260 ±5.999·10^-4 keV
Single-particle energy	11,690 ±0.013 keV
Neutron separation energy	16,530 ±0.0343 keV
Q value for electron capture	-5,516 ±0.021 keV
β⁻ decay energy	-13,890 ±0.2282 keV
β⁻ decay energy with neutron	-28,760 ±0.3449 keV
Magnetic dipole moment	1.08 ±0.03 μN
Electric quadrupole moment	-0.29 ±0.03 b

Point at nuclide

25MgMagnesium-25

Classification	z: 12; n: 13; m: 25
Half life	stable nuclide
Natural abundance	10.01 ±0.013 %
Spin/parity	5/2+
Discovery	1920
Mass excess	-13,200 ±0.047 keV
Binding energy	8,223 ±0.0019 keV
Single-particle energy	12,060 ±0.0497 keV
Neutron separation energy	7,330 ±0.0471 keV
Q value for electron capture	-3,835 ±1.201 keV
β⁻ decay energy	-4,277 ±0.0447 keV
β⁻ decay energy with neutron	-21,220 ±0.2326 keV
Magnetic dipole moment	-0.8554 ±3·10^-5 μN
Electric quadrupole moment	0.199 ±0.002 b

Point at nuclide

26MgMagnesium-26

Classification	z: 12; n: 14; m: 26
Half life	stable nuclide
Natural abundance	11.02 ±0.038 %
Spin/parity	0+
Discovery	1920
Mass excess	-16,220 ±0.029 keV
Binding energy	8,333 ±0.0011 keV
Single-particle energy	14,140 ±1.2 keV
Neutron separation energy	11,090 ±0.0443 keV
Q value for electron capture	-9,354 ±3.502 keV
β⁻ decay energy	-4,005 ±0.0629 keV
β⁻ decay energy with neutron	-15,370 ±0.0629 keV
Magnetic dipole moment	1.1 ±0.3 μN
Electric quadrupole moment	-0.21 ±0.02 b

Point at nuclide

27MgMagnesium-27

Classification	z: 12; n: 15; m: 27
Half life	9.458 ±12 m
Natural abundance	synthetic nuclide
Spin/parity	1/2+
Decay modes	β⁻ decay
Discovery	1934
Mass excess	-14,590 ±0.047 keV
Binding energy	8,263 ±0.0018 keV
Single-particle energy	15,010 ±3.502 keV
Neutron separation energy	6,443 ±0.0388 keV
Q value for electron capture	-9,069 ±3.726 keV
β⁻ decay energy	2,610 ±0.0669 keV
β⁻ decay energy with neutron	-10,450 ±0.0737 keV
Magnetic dipole moment	-0.4106 ±0.0015 μN

Point at nuclide Decay chain of Magnesium-27

28MgMagnesium-28

Classification	z: 12; n: 16; m: 28
Half life	20.91 ±9 h
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1953
Mass excess	-15,020 ±0.261 keV
Binding energy	8,272 ±0.0093 keV
Single-particle energy	16,790 ±3.735 keV
Neutron separation energy	8,504 ±0.2651 keV
Q value for electron capture	-14,040 ±10.24 keV
β⁻ decay energy	1,830 ±0.2653 keV
β⁻ decay energy with neutron	-5,895 ±0.2651 keV

Point at nuclide Decay chain of Magnesium-28

29MgMagnesium-29

Classification	z: 12; n: 17; m: 29
Half life	1.3 ±12 s
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	β⁻ decay
Discovery	1971
Mass excess	-10,620 ±0.345 keV
Binding energy	8,113 ±0.0119 keV
Single-particle energy	16,910 ±10.25 keV
Neutron separation energy	3,663 ±0.4321 keV
Q value for electron capture	-13,300 ±7.345 keV
β⁻ decay energy	7,595 ±0.4873 keV
β⁻ decay energy with neutron	-1,833 ±0.3479 keV
Magnetic dipole moment	0.9779 ±5.999·10^-4 μN
Electric quadrupole moment	-0.16 ±0.04 b

Point at nuclide Decay chain of Magnesium-29

30MgMagnesium-30

Classification	z: 12; n: 18; m: 30
Half life	335 ±17 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1971
Mass excess	-8,882 ±1.295 keV
Binding energy	8,054 ±0.0432 keV
Single-particle energy	18,850 ±7.45 keV
Neutron separation energy	6,340 ±1.339 keV
Q value for electron capture	-17,360 ±4.901 keV
β⁻ decay energy	6,982 ±2.328 keV
β⁻ decay energy with neutron	1,255 ±1.34 keV

Point at nuclide Decay chain of Magnesium-30

31MgMagnesium-31

Classification	z: 12; n: 19; m: 31
Half life	270 ±2 ms
Natural abundance	synthetic nuclide
Spin/parity	1/2+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1977
Mass excess	-3,123 ±3.074 keV
Binding energy	7,869 ±0.0992 keV
Single-particle energy	18,880 ±5.638 keV
Neutron separation energy	2,312 ±3.335 keV
Q value for electron capture	-15,370 ±14.3 keV
β⁻ decay energy	11,820 ±3.8 keV
β⁻ decay energy with neutron	4,670 ±3.632 keV
Magnetic dipole moment	-0.8834 ±1.499·10^-4 μN

Point at nuclide Decay chain of Magnesium-31

32MgMagnesium-32

Classification	z: 12; n: 20; m: 32
Half life	86 ±5 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1977
Mass excess	-829 ±3.26 keV
Binding energy	7,803 ±0.1019 keV
Single-particle energy	20,360 ±14.34 keV
Neutron separation energy	5,778 ±4.48 keV
Q value for electron capture	-19,470 ±37.4 keV
β⁻ decay energy	10,270 ±7.878 keV
β⁻ decay energy with neutron	6,050 ±3.953 keV

Point at nuclide Decay chain of Magnesium-32

33MgMagnesium-33

Classification	z: 12; n: 21; m: 33
Half life	90.5 ±16 ms
Natural abundance	synthetic nuclide
Spin/parity	3/2-
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1979
Mass excess	4,962 ±2.663 keV
Binding energy	7,636 ±0.0807 keV
Single-particle energy	20,960 ±37.35 keV
Neutron separation energy	2,279 ±4.209 keV
Q value for electron capture	-18,820 ±449.9 keV
β⁻ decay energy	13,460 ±7.476 keV
β⁻ decay energy with neutron	7,990 ±7.651 keV
Magnetic dipole moment	-0.7455 ±5·10^-4 μN
Electric quadrupole moment	0.13 ±0.09 b

Point at nuclide Decay chain of Magnesium-33

34MgMagnesium-34

Classification	z: 12; n: 22; m: 34
Half life	20 ±10 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1979
Mass excess	8,323 ±6.893 keV
Binding energy	7,550 ±0.2027 keV
Single-particle energy	22,740 ±449.9 keV
Neutron separation energy	4,710 ±7.389 keV
Q value for electron capture	-23,360 ±599.4 keV
β⁻ decay energy	11,320 ±7.207 keV
β⁻ decay energy with neutron	8,749 ±9.814 keV

Point at nuclide Decay chain of Magnesium-34

35MgMagnesium-35

Classification	z: 12; n: 23; m: 35
Half life	11.3 ±6 ms
Natural abundance	synthetic nuclide
Spin/parity	(3/2- 5/2-)
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with three-neutron emission
Discovery	1989
Mass excess	15,630 ±269.6 keV
Binding energy	7,356 ±7.704 keV
Single-particle energy	23,320 ±657.2 keV
Neutron separation energy	754.8 ±269.7 keV
Q value for electron capture	-22,200 ±722.2 keV
β⁻ decay energy	15,860 ±269.7 keV
β⁻ decay energy with neutron	10,560 ±269.6 keV

Point at nuclide Decay chain of Magnesium-35

36MgMagnesium-36

Classification	z: 12; n: 24; m: 36
Half life	7.6 ± ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1989
Mass excess	20,380 ±690.2 keV
Binding energy	7,244 ±19.17 keV
Single-particle energy	24,740 ±962 keV
Neutron separation energy	3,330 ±741 keV
Q value for electron capture	-25,530 ±973.8 keV
β⁻ decay energy	14,420 ±706.2 keV
β⁻ decay energy with neutron	12,530 ±690.2 keV

Point at nuclide Decay chain of Magnesium-36

37MgMagnesium-37

Classification	z: 12; n: 25; m: 37
Half life	8 ±4 ms
Natural abundance	synthetic nuclide
Decay modes	neutron emission; β⁻ decay with neutron emission; β⁻ decay
Discovery	1996
Mass excess	28,210 ±698.9 keV
Binding energy	7,055 ±18.89 keV
Single-particle energy	24,980 ±980 keV
Neutron separation energy	240 ±110 keV
Q value for electron capture	-24,930 ±980 keV
β⁻ decay energy	18,400 ±721.8 keV
β⁻ decay energy with neutron	14,180 ±714.7 keV

Point at nuclide Decay chain of Magnesium-37

38MgMagnesium-38

Classification	z: 12; n: 26; m: 38
Half life	stable nuclide
Natural abundance	synthetic nuclide
Spin/parity	0+
Discovery	1997
Mass excess	34,070 ±503 keV
Binding energy	6,928 ±13 keV
Single-particle energy	26,340 ±851 keV
Neutron separation energy	2,209 ±861 keV
β⁻ decay energy	17,600 ±525 keV
β⁻ decay energy with neutron	16,190 ±534 keV

Point at nuclide

39MgMagnesium-39

Classification	z: 12; n: 27; m: 39
Half life	180 ns
Natural abundance	synthetic nuclide
Decay modes	neutron emission
Mass excess	42,770 ±513 keV
Binding energy	6,734 ±13 keV
Single-particle energy	26,410 ±880 keV
Neutron separation energy	-630 ±100 keV
β⁻ decay energy	21,280 ±594 keV
β⁻ decay energy with neutron	18,230 ±534 keV

Point at nuclide Decay chain of Magnesium-39

40MgMagnesium-40

Classification	z: 12; n: 28; m: 40
Half life	stable nuclide
Natural abundance	synthetic nuclide
Spin/parity	0+
Discovery	2007
Mass excess	49,550 ±500 keV
Binding energy	6,598 ±13 keV
Single-particle energy	27,710 ±896 keV
Neutron separation energy	1,297 ±716 keV
β⁻ decay energy	20,720 ±583 keV
β⁻ decay energy with neutron	19,980 ±583 keV

Point at nuclide

Isotopes of Magnesium

18MgMagnesium-18ads_clickcall_splitdownload

19MgMagnesium-19ads_clickcall_splitdownload

20MgMagnesium-20ads_clickcall_splitdownload

21MgMagnesium-21ads_clickcall_splitdownload

22MgMagnesium-22ads_clickcall_splitdownload

23MgMagnesium-23ads_clickcall_splitdownload

24MgMagnesium-24ads_clickdownload

25MgMagnesium-25ads_clickdownload

26MgMagnesium-26ads_clickdownload

27MgMagnesium-27ads_clickcall_splitdownload

28MgMagnesium-28ads_clickcall_splitdownload

29MgMagnesium-29ads_clickcall_splitdownload

30MgMagnesium-30ads_clickcall_splitdownload

31MgMagnesium-31ads_clickcall_splitdownload

32MgMagnesium-32ads_clickcall_splitdownload

33MgMagnesium-33ads_clickcall_splitdownload

34MgMagnesium-34ads_clickcall_splitdownload

35MgMagnesium-35ads_clickcall_splitdownload

36MgMagnesium-36ads_clickcall_splitdownload

37MgMagnesium-37ads_clickcall_splitdownload

38MgMagnesium-38ads_clickdownload

39MgMagnesium-39ads_clickcall_splitdownload

40MgMagnesium-40ads_clickdownload

18MgMagnesium-18

19MgMagnesium-19

20MgMagnesium-20

21MgMagnesium-21

22MgMagnesium-22

23MgMagnesium-23

24MgMagnesium-24

25MgMagnesium-25

26MgMagnesium-26

27MgMagnesium-27

28MgMagnesium-28

29MgMagnesium-29

30MgMagnesium-30

31MgMagnesium-31

32MgMagnesium-32

33MgMagnesium-33

34MgMagnesium-34

35MgMagnesium-35

36MgMagnesium-36

37MgMagnesium-37

38MgMagnesium-38

39MgMagnesium-39

40MgMagnesium-40