Argon Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
30Ar |
30.02156 (32) |
|
<20 |
ns |
20,080 (300) |
6,930 (10) |
2p ? |
|
31Ar |
31.01212 (22) |
|
14.4 |
ms |
11,290 (210) |
7,253 (7) |
B+ |
100 |
32Ar |
31.9976380 (19) |
|
98 |
ms |
-2,200.2 (1.8) |
7,700.00 (5.6) |
B+ |
100 |
33Ar |
32.98992571 (48) |
|
173 |
ms |
-9,384.14 (44) |
7,928.95 (1.3) |
B+ |
100 |
34Ar |
33.98027124 (41) |
|
845 |
ms |
-18,377.22 (39) |
8,197.64 (1.1) |
B+ |
100 |
35Ar |
34.97525759 (80) |
|
1.775 |
s |
-23,047.41 (75) |
8,327.47 (2.1) |
B+ |
100 |
36Ar |
35.967545105 (28) |
0.3365 (30) |
stable |
|
-30,231.540 (27) |
8,519.909 (1) |
|
|
37Ar |
36.96677632 (22) |
|
35.04 |
d |
-30,947.66 (20) |
8,527.139 (6) |
EC |
100 |
38Ar |
37.96273239 (36) |
0.0632 (5) |
stable |
|
-34,714.55 (34) |
8,614.273 (9) |
|
|
39Ar |
38.9643132 (54) |
|
269 |
y |
-33,242.0 (5) |
8,562.6 (1.3) |
B- |
100 |
40Ar |
39.9623831225 (29) |
99.6003 (30) |
stable |
|
-35,039.8960 (27) |
8,595 (0) |
|
|
41Ar |
40.96450061 (36) |
|
109.61 |
m |
-33,067.47 (33) |
8,534.371 (8) |
B- |
100 |
42Ar |
41.9630457 (62) |
|
32.9 |
y |
-34,422.7 (5.8) |
8,555.6 (1.4) |
B- |
100 |
43Ar |
42.9656361 (57) |
|
5.37 |
m |
-32,009.8 (5.3) |
8,488.2 (1.2) |
B- |
100 |
44Ar |
43.9649240 (17) |
|
11.87 |
m |
-32,673.1 (1.6) |
8,493.84 (3.6) |
B- |
100 |
45Ar |
44.96803996 (59) |
|
21.48 |
s |
-29,770.59 (55) |
8,419.95 (1.2) |
B- |
100 |
46Ar |
45.968094 (44) |
|
8.4 |
s |
-29,720 (41) |
8,411.3 (8.9) |
B- |
100 |
47Ar |
46.97219 (11) |
|
580 |
ms |
-25,910 (100) |
8,323 (2.1) |
B- |
100 |
48Ar |
47.97454 (32) |
|
500 |
ms |
-23,720 (300) |
8,272 (6) |
B- ? |
|
49Ar |
48.98052 (54) |
|
170 |
ms |
-18,150 (500) |
8,150 (10) |
B- |
100 |
50Ar |
49.98443 (75) |
|
85 |
ms |
-14,500 (700) |
8,080 (14) |
B- |
100 |
51Ar |
50.99163 (75) |
|
60 |
ms |
-7,800 (700) |
7,950 (14) |
B- ? |
|
52Ar |
51.99678 (97) |
|
10 |
ms |
-3,000 (900) |
7,860 (17) |
B- ? |
|
53Ar |
53.0049 (11) |
|
3 |
ms |
4,600 (1000) |
7,720 (19) |
B- ? |
|
32mAr |
31.9976380 (19) |
|
|
|
-2,200.2 (1.8) |
7,700.00 (5.6) |
IT ? |
|
Data Source: ENSDF March 2005
©Radiochemistry Society 2005