鋁有28個同位素，只係得27Al比較穩定，其餘嘅都非常唔穩定。
| 符號
|
Z（p）
|
N（n）
|
質量（u）
|
半衰期
|
原子核自旋
|
相對豐度
|
相對豐度嘅變化量
|
|---|
| 激發能量
|
|---|
| 19Al
|
13
|
6
|
19.0(218)#
|
<(35) ns #
|
|
|
|
| 20Al
|
13
|
7
|
(20.0194)#
|
<3(5) ns #
|
|
|
|
| 21Al
|
13
|
8
|
21.02804(32)#
|
<35 ns
|
1/2+#
|
|
|
| 22Al
|
13
|
9
|
22.01952(10)#
|
59(3) ms
|
(3)+
|
|
|
| 23Al
|
13
|
10
|
23.007267(20)
|
470(30) ms
|
5/2+#
|
|
|
| 23mAl
|
|
~0.35 s
|
#79
|
|
|
| 24Al
|
13
|
11
|
23.9999389(30)
|
2.053(4) s
|
4+
|
|
|
| 24mAl
|
425.8(1) keV
|
131.3(25) ms
|
1+
|
|
|
| 25Al
|
13
|
12
|
24.9904281(5)
|
7.183(12) s
|
5/2+
|
|
|
| 26Al
|
13
|
13
|
25.98689169(6)
|
7.17(24)E+5 a
|
5+
|
|
|
| 26mAl
|
228.305(13) keV
|
6.3452(19) s
|
0+
|
|
|
| 27Al
|
13
|
14
|
26.98153863(12)
|
穩定
|
5/2+
|
1.0000
|
|
| 28Al
|
13
|
15
|
27.98191031(14)
|
2.2414(12) min
|
3+
|
|
|
| 29Al
|
13
|
16
|
28.9804450(13)
|
6.56(6) min
|
5/2+
|
|
|
| 30Al
|
13
|
17
|
29.982960(15)
|
3.60(6) s
|
3+
|
|
|
| 31Al
|
13
|
18
|
30.983947(22)
|
644(25) ms
|
(3/2,5/2)+
|
|
|
| 32Al
|
13
|
19
|
31.98812(9)
|
31.7(8) ms
|
1+
|
|
|
| 32mAl
|
955.7(4) keV
|
200(20) ns
|
(4+)
|
|
|
| 33Al
|
13
|
20
|
32.99084(8)
|
41.7(2) ms
|
(5/2+)#
|
|
|
| 34Al
|
13
|
21
|
33.99685(12)
|
56.3(5) ms
|
4-#
|
|
|
| 35Al
|
13
|
22
|
34.99986(19)
|
38.6(4) ms
|
5/2+#
|
|
|
| 36Al
|
13
|
23
|
36.00621(23)
|
90(40) ms
|
|
|
|
| 37Al
|
13
|
24
|
37.01068(36)
|
10.7(13) ms
|
|
|
|
| 38Al
|
13
|
25
|
38.01723(78)
|
7.6(6) ms
|
|
|
|
| 39Al
|
13
|
26
|
39.02297(158)
|
7.6(16) ms
|
3/2+#
|
|
|
| 40Al
|
13
|
27
|
40.03145(75)#
|
10# ms [>260 ns]
|
|
|
|
| 41Al
|
13
|
28
|
41.03833(86)#
|
2# ms [>260 ns]
|
3/2+#
|
|
|
| 42Al
|
13
|
29
|
42.04689(97)#
|
1# ms
|
|
|
|
備註：畫上#號嘅數據代表冇經過實驗嘅證明，只係理論推測，而用咗括號括係代表數據唔確定。
- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
