Isotopes of Aluminum

List of known isotopes of the element Aluminum.

Isotope	t½	%	Spin/parity	Radius	Isotopic mass	Discovery
²¹Al	35 ns	syn.	(5/2+)	—	2.102·10⁷ ±644 keV/c²	—
²²Al	91.1 ±5 ms	syn.	(4)+	—	2.201·10⁷ ±430 keV/c²	1982
²³Al	446 ±6 ms	syn.	5/2+	—	2.3·10⁷ ±0.37 keV/c²	1969
²⁴Al	2.053 ±4 s	syn.	4+	—	2.399·10⁷ ±0.244 keV/c²	1953
²⁵Al	7.183 ±12 s	syn.	5/2+	—	2.499·10⁷ ±0.069 keV/c²	1953
²⁶Al	717,000 ±24 a	syn.	5+	—	2.598·10⁷ ±0.071 keV/c²	1934
²⁷Al	stab.	100 %	5/2+	3.061 ±0.0031 fm	2.698·10⁷ ±0.05 keV/c²	1922
²⁸Al	2.245 ±2 m	syn.	3+	—	2.798·10⁷ ±0.052 keV/c²	1934
²⁹Al	6.56 ±6 m	syn.	5/2+	—	2.898·10⁷ ±0.37 keV/c²	1939
³⁰Al	3.62 ±6 s	syn.	3+	—	2.998·10⁷ ±2.077 keV/c²	1961
³¹Al	644 ±25 ms	syn.	5/2(+)	—	3.098·10⁷ ±2.4 keV/c²	1971
³²Al	33 ±2 ms	syn.	1+	—	3.198·10⁷ ±7.7 keV/c²	1971
³³Al	41.7 ±2 ms	syn.	(5/2)+	—	3.299·10⁷ ±7.5 keV/c²	1971
³⁴Al	56.3 ±5 ms	syn.	(4-)	—	3.399·10⁷ ±2.259 keV/c²	1977
³⁵Al	38.3 ±4 ms	syn.	(5/2+)	—	3.499·10⁷ ±7.9 keV/c²	1979
³⁶Al	90 ±40 ms	syn.	—	—	3.6·10⁷ ±160.5 keV/c²	1979
³⁷Al	10.7 ±13 ms	syn.	—	—	3.701·10⁷ ±193.5 keV/c²	1979
³⁸Al	9 ±7 ms	syn.	(0-)	—	3.801·10⁷ ±161 keV/c²	1989
³⁹Al	7.6 ±16 ms	syn.	(5/2+)	—	3.902·10⁷ ±322 keV/c²	1989
⁴⁰Al	260 ns	syn.	—	—	4.003·10⁷ ±322 keV/c²	1996
⁴¹Al	stab.	syn.	—	—	4.103·10⁷ ±429 keV/c²	1997
⁴²Al	170 ns	syn.	—	—	4.204·10⁷ ±537 keV/c²	2007
⁴³Al	170 ns	syn.	—	—	4.305·10⁷ ±644 keV/c²	2007

21AlAluminum-21

Classification	z: 13; n: 8; m: 21
Half life	35 ns
Natural abundance	synthetic nuclide
Spin/parity	(5/2+)
Decay modes	proton emission
Mass excess	27,090 ±600 keV
Binding energy	6,297 ±29 keV
Single-particle energy	-2,323 ±600 keV
Q value for electron capture	16,180 ±600 keV

Point at nuclide Decay chain of Aluminum-21

22AlAluminum-22

Classification	z: 13; n: 9; m: 22
Half life	91.1 ±5 ms
Natural abundance	synthetic nuclide
Spin/parity	(4)+
Decay modes	electron capture + β⁺ decay; β⁺ decay + proton emission; β⁺ decay with two-proton emission
Discovery	1982
Mass excess	18,200 ±401 keV
Binding energy	6,782 ±18 keV
Single-particle energy	-9 ±401 keV
Neutron separation energy	16,960 ±721 keV
Q value for electron capture	18,600 ±401 keV
β⁻ decay energy	-15,440 ±641 keV

Point at nuclide Decay chain of Aluminum-22

23AlAluminum-23

Classification	z: 13; n: 10; m: 23
Half life	446 ±6 ms
Natural abundance	synthetic nuclide
Spin/parity	5/2+
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1969
Mass excess	6,748 ±0.345 keV
Binding energy	7,335 ±0.015 keV
Single-particle energy	140.9 ±0.3797 keV
Neutron separation energy	19,520 ±401 keV
Q value for electron capture	12,220 ±0.346 keV
β⁻ decay energy	-17,210 ±500 keV
β⁻ decay energy with neutron	-34,970 ±500 keV
Magnetic dipole moment	3.89 ±0.02 μN

Point at nuclide Decay chain of Aluminum-23

24AlAluminum-24

Classification	z: 13; n: 11; m: 24
Half life	2.053 ±4 s
Natural abundance	synthetic nuclide
Spin/parity	4+
Decay modes	electron capture + β⁺ decay; electron capture + α decay; electron capture + proton emission
Discovery	1953
Mass excess	-48.82 ±0.228 keV
Binding energy	7,649 ±0.0095 keV
Single-particle energy	1,864 ±0.2301 keV
Neutron separation energy	14,860 ±0.4132 keV
Q value for electron capture	13,880 ±0.228 keV
β⁻ decay energy	-10,800 ±19.47 keV
β⁻ decay energy with neutron	-32,070 ±500 keV
Magnetic dipole moment	2.99 ±0.09 μN

Point at nuclide Decay chain of Aluminum-24

25AlAluminum-25

Classification	z: 13; n: 12; m: 25
Half life	7.183 ±12 s
Natural abundance	synthetic nuclide
Spin/parity	5/2+
Decay modes	electron capture + β⁺ decay
Discovery	1953
Mass excess	-8,916 ±0.065 keV
Binding energy	8,021 ±0.0026 keV
Single-particle energy	2,271 ±0.065 keV
Neutron separation energy	16,930 ±0.2369 keV
Q value for electron capture	4,276 ±0.08 keV
β⁻ decay energy	-12,750 ±10 keV
β⁻ decay energy with neutron	-27,740 ±19.47 keV
Magnetic dipole moment	3.644 ±0.0012 μN
Electric quadrupole moment	0.24 ±0.02 b

Point at nuclide Decay chain of Aluminum-25

26AlAluminum-26

Classification	z: 13; n: 13; m: 26
Half life	717,000 ±24 a
Natural abundance	synthetic nuclide
Spin/parity	5+
Decay modes	electron capture + β⁺ decay
Discovery	1934
Mass excess	-12,220 ±0.066 keV
Binding energy	8,149 ±0.0026 keV
Single-particle energy	6,306 ±0.056 keV
Neutron separation energy	11,360 ±0.0717 keV
Q value for electron capture	4,004 ±0.072 keV
β⁻ decay energy	-5,070 ±0.0849 keV
β⁻ decay energy with neutron	-24,110 ±10 keV
Magnetic dipole moment	2.803 ±0.004 μN
Electric quadrupole moment	0.26 ±0.03 b

Point at nuclide Decay chain of Aluminum-26

27AlAluminum-27

Classification	z: 13; n: 14; m: 27
Half life	stable nuclide
Natural abundance	100 %
Spin/parity	5/2+
Discovery	1922
Mass excess	-17,200 ±0.047 keV
Binding energy	8,331 ±0.0018 keV
Single-particle energy	8,271 ±0.0557 keV
Neutron separation energy	13,050 ±0.0814 keV
Q value for electron capture	-2,611 ±0.06 keV
β⁻ decay energy	-4,813 ±0.0964 keV
β⁻ decay energy with neutron	-18,130 ±0.1176 keV
Magnetic dipole moment	3.64 ±2·10^-5 μN
Electric quadrupole moment	0.1466 ±0.001 b

Point at nuclide

28AlAluminum-28

Classification	z: 13; n: 15; m: 28
Half life	2.245 ±2 m
Natural abundance	synthetic nuclide
Spin/parity	3+
Decay modes	β⁻ decay
Discovery	1934
Mass excess	-16,860 ±0.049 keV
Binding energy	8,309 ±0.0018 keV
Single-particle energy	9,553 ±0.0678 keV
Neutron separation energy	7,725 ±0.011 keV
Q value for electron capture	-1,831 ±0.266 keV
β⁻ decay energy	4,642 ±0.0486 keV
β⁻ decay energy with neutron	-12,540 ±0.097 keV
Magnetic dipole moment	3.241 ±0.005 μN
Electric quadrupole moment	0.172 ±0.012 b

Point at nuclide Decay chain of Aluminum-28

29AlAluminum-29

Classification	z: 13; n: 16; m: 29
Half life	6.56 ±6 m
Natural abundance	synthetic nuclide
Spin/parity	5/2+
Decay modes	β⁻ decay
Discovery	1939
Mass excess	-18,210 ±0.345 keV
Binding energy	8,348 ±0.0119 keV
Single-particle energy	10,470 ±0.4322 keV
Neutron separation energy	9,428 ±0.3481 keV
Q value for electron capture	-7,596 ±0.488 keV
β⁻ decay energy	3,687 ±0.3447 keV
β⁻ decay energy with neutron	-4,787 ±0.3447 keV

Point at nuclide Decay chain of Aluminum-29

30AlAluminum-30

Classification	z: 13; n: 17; m: 30
Half life	3.62 ±6 s
Natural abundance	synthetic nuclide
Spin/parity	3+
Decay modes	β⁻ decay
Discovery	1961
Mass excess	-15,870 ±1.936 keV
Binding energy	8,261 ±0.0645 keV
Single-particle energy	12,540 ±1.966 keV
Neutron separation energy	5,727 ±1.966 keV
Q value for electron capture	-6,983 ±2.329 keV
β⁻ decay energy	8,568 ±1.935 keV
β⁻ decay energy with neutron	-2,041 ±1.935 keV
Magnetic dipole moment	3.012 ±0.007 μN

Point at nuclide Decay chain of Aluminum-30

31AlAluminum-31

Classification	z: 13; n: 18; m: 31
Half life	644 ±25 ms
Natural abundance	synthetic nuclide
Spin/parity	5/2(+)
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1971
Mass excess	-14,960 ±2.236 keV
Binding energy	8,225 ±0.0721 keV
Single-particle energy	13,350 ±2.583 keV
Neutron separation energy	7,157 ±2.957 keV
Q value for electron capture	-11,830 ±3.801 keV
β⁻ decay energy	7,998 ±2.236 keV
β⁻ decay energy with neutron	1,410 ±2.235 keV
Magnetic dipole moment	3.832 ±0.005 μN
Electric quadrupole moment	0.134 ±0.002 b

Point at nuclide Decay chain of Aluminum-31

32AlAluminum-32

Classification	z: 13; n: 19; m: 32
Half life	33 ±2 ms
Natural abundance	synthetic nuclide
Spin/parity	1+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1971
Mass excess	-11,100 ±7.173 keV
Binding energy	8,100 ±0.2241 keV
Single-particle energy	15,260 ±7.803 keV
Neutron separation energy	4,219 ±7.512 keV
Q value for electron capture	-10,280 ±7.879 keV
β⁻ decay energy	12,970 ±7.178 keV
β⁻ decay energy with neutron	3,778 ±7.172 keV
Magnetic dipole moment	1.953 ±0.002 μN
Electric quadrupole moment	0.0255 ±3·10^-4 b

Point at nuclide Decay chain of Aluminum-32

33AlAluminum-33

Classification	z: 13; n: 20; m: 33
Half life	41.7 ±2 ms
Natural abundance	synthetic nuclide
Spin/parity	(5/2)+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1971
Mass excess	-8,498 ±6.986 keV
Binding energy	8,020 ±0.2117 keV
Single-particle energy	14,950 ±7.709 keV
Neutron separation energy	5,469 ±10.01 keV
Q value for electron capture	-13,470 ±7.476 keV
β⁻ decay energy	12,010 ±7.021 keV
β⁻ decay energy with neutron	7,508 ±6.992 keV
Magnetic dipole moment	4.09 ±0.005 μN
Electric quadrupole moment	0.141 ±0.003 b

Point at nuclide Decay chain of Aluminum-33

34AlAluminum-34

Classification	z: 13; n: 21; m: 34
Half life	56.3 ±5 ms
Natural abundance	synthetic nuclide
Spin/parity	(4-)
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1977
Mass excess	-2,998 ±2.105 keV
Binding energy	7,860 ±0.0619 keV
Single-particle energy	15,240 ±3.394 keV
Neutron separation energy	2,571 ±7.296 keV
Q value for electron capture	-11,330 ±7.207 keV
β⁻ decay energy	16,990 ±2.251 keV
β⁻ decay energy with neutron	9,445 ±2.217 keV
Magnetic dipole moment	2.157 ±0.016 μN
Electric quadrupole moment	0.038 ±0.005 b

Point at nuclide Decay chain of Aluminum-34

35AlAluminum-35

Classification	z: 13; n: 22; m: 35
Half life	38.3 ±4 ms
Natural abundance	synthetic nuclide
Spin/parity	(5/2+)
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with two-neutron emission
Discovery	1979
Mass excess	-223.8 ±7.359 keV
Binding energy	7,787 ±0.2103 keV
Single-particle energy	15,830 ±10.08 keV
Neutron separation energy	5,297 ±7.653 keV
Q value for electron capture	-15,870 ±269.7 keV
β⁻ decay energy	14,160 ±36.6 keV
β⁻ decay energy with neutron	11,690 ±7.402 keV

Point at nuclide Decay chain of Aluminum-35

36AlAluminum-36

Classification	z: 13; n: 23; m: 36
Half life	90 ±40 ms
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1979
Mass excess	5,950 ±149.5 keV
Binding energy	7,623 ±4.152 keV
Single-particle energy	16,970 ±308.3 keV
Neutron separation energy	1,897 ±149.6 keV
Q value for electron capture	-14,430 ±706.2 keV
β⁻ decay energy	18,380 ±165.8 keV
β⁻ decay energy with neutron	12,270 ±153.7 keV

Point at nuclide Decay chain of Aluminum-36

37AlAluminum-37

Classification	z: 13; n: 24; m: 37
Half life	10.7 ±13 ms
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1979
Mass excess	9,809 ±180.2 keV
Binding energy	7,531 ±4.871 keV
Single-particle energy	17,850 ±713.3 keV
Neutron separation energy	4,212 ±234.1 keV
Q value for electron capture	-18,410 ±721.8 keV
β⁻ decay energy	16,380 ±213.1 keV
β⁻ decay energy with neutron	14,170 ±194 keV

Point at nuclide Decay chain of Aluminum-37

38AlAluminum-38

Classification	z: 13; n: 25; m: 38
Half life	9 ±7 ms
Natural abundance	synthetic nuclide
Spin/parity	(0-)
Decay modes	β⁻ decay with neutron emission; β⁻ decay with two-neutron emission; β⁻ decay
Discovery	1989
Mass excess	16,470 ±150 keV
Binding energy	7,370 ±4 keV
Single-particle energy	19,030 ±715 keV
Neutron separation energy	1,411 ±234 keV
Q value for electron capture	-17,610 ±524.8 keV
β⁻ decay energy	20,640 ±183 keV
β⁻ decay energy with neutron	14,970 ±188 keV

Point at nuclide Decay chain of Aluminum-38

39AlAluminum-39

Classification	z: 13; n: 26; m: 39
Half life	7.6 ±16 ms
Natural abundance	synthetic nuclide
Spin/parity	(5/2+)
Decay modes	β⁻ decay; β⁻ decay with two-neutron emission; β⁻ decay with neutron emission
Discovery	1989
Mass excess	21,490 ±300 keV
Binding energy	7,260 ±8 keV
Single-particle energy	19,870 ±586 keV
Neutron separation energy	3,051 ±335 keV
Q value for electron capture	-21,290 ±594.2 keV
β⁻ decay energy	19,160 ±329 keV
β⁻ decay energy with neutron	17,580 ±318 keV

Point at nuclide Decay chain of Aluminum-39

40AlAluminum-40

Classification	z: 13; n: 27; m: 40
Half life	260 ns
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with two-neutron emission; β⁻ decay with neutron emission
Discovery	1996
Mass excess	28,820 ±300 keV
Binding energy	7,097 ±7 keV
Single-particle energy	21,240 ±594 keV
Neutron separation energy	740 ±424 keV
Q value for electron capture	-20,730 ±583 keV
β⁻ decay energy	23,150 ±324 keV
β⁻ decay energy with neutron	18,420 ±329 keV

Point at nuclide Decay chain of Aluminum-40

41AlAluminum-41

Classification	z: 13; n: 28; m: 41
Half life	stable nuclide
Natural abundance	synthetic nuclide
Discovery	1997
Mass excess	34,590 ±400 keV
Binding energy	6,980 ±10 keV
Single-particle energy	22,240 ±640 keV
Neutron separation energy	2,302 ±500 keV
β⁻ decay energy	21,390 ±500 keV
β⁻ decay energy with neutron	20,850 ±418 keV

Point at nuclide

42AlAluminum-42

Classification	z: 13; n: 29; m: 42
Half life	170 ns
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with two-neutron emission
Discovery	2007
Mass excess	41,990 ±500 keV
Binding energy	6,829 ±12 keV
Single-particle energy	23,390 ±707 keV
Neutron separation energy	672 ±640 keV
β⁻ decay energy	25,150 ±583 keV
β⁻ decay energy with neutron	20,710 ±583 keV

Point at nuclide Decay chain of Aluminum-42

43AlAluminum-43

Classification	z: 13; n: 30; m: 43
Half life	170 ns
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with two-neutron emission
Discovery	2007
Mass excess	48,270 ±600 keV
Binding energy	6,712 ±14 keV
Neutron separation energy	1,791 ±781 keV
β⁻ decay energy	23,940 ±721 keV
β⁻ decay energy with neutron	23,350 ±671 keV

Point at nuclide Decay chain of Aluminum-43

Isotopes of Aluminum

21AlAluminum-21ads_clickcall_splitdownload

22AlAluminum-22ads_clickcall_splitdownload

23AlAluminum-23ads_clickcall_splitdownload

24AlAluminum-24ads_clickcall_splitdownload

25AlAluminum-25ads_clickcall_splitdownload

26AlAluminum-26ads_clickcall_splitdownload

27AlAluminum-27ads_clickdownload

28AlAluminum-28ads_clickcall_splitdownload

29AlAluminum-29ads_clickcall_splitdownload

30AlAluminum-30ads_clickcall_splitdownload

31AlAluminum-31ads_clickcall_splitdownload

32AlAluminum-32ads_clickcall_splitdownload

33AlAluminum-33ads_clickcall_splitdownload

34AlAluminum-34ads_clickcall_splitdownload

35AlAluminum-35ads_clickcall_splitdownload

36AlAluminum-36ads_clickcall_splitdownload

37AlAluminum-37ads_clickcall_splitdownload

38AlAluminum-38ads_clickcall_splitdownload

39AlAluminum-39ads_clickcall_splitdownload

40AlAluminum-40ads_clickcall_splitdownload

41AlAluminum-41ads_clickdownload

42AlAluminum-42ads_clickcall_splitdownload

43AlAluminum-43ads_clickcall_splitdownload

21AlAluminum-21

22AlAluminum-22

23AlAluminum-23

24AlAluminum-24

25AlAluminum-25

26AlAluminum-26

27AlAluminum-27

28AlAluminum-28

29AlAluminum-29

30AlAluminum-30

31AlAluminum-31

32AlAluminum-32

33AlAluminum-33

34AlAluminum-34

35AlAluminum-35

36AlAluminum-36

37AlAluminum-37

38AlAluminum-38

39AlAluminum-39

40AlAluminum-40

41AlAluminum-41

42AlAluminum-42

43AlAluminum-43