Potassium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
32K |
32.02192 (54) |
|
|
|
20,420 (500) |
6,970 (16) |
p ? |
|
33K |
33.00726 (21) |
|
<25 |
ns |
6,760 (200) |
7,416 (6) |
p ? |
|
34K |
33.99841 (32) |
|
<40 |
ns |
-1,480 (300) |
7,678 (9) |
p ? |
|
35K |
34.988010 (21) |
|
178 |
ms |
-11,169 (20) |
7,965.7 (5.7) |
B+ |
100 |
36K |
35.9812922 (84) |
|
342 |
ms |
-17,426.2 (7.8) |
8,142.5 (2.2) |
B+ |
100 |
37K |
36.97337589 (10) |
|
1.226 |
s |
-24,800.199 (94) |
8,339.847 (3) |
B+ |
100 |
38K |
37.96908118 (48) |
|
7.636 |
m |
-28,800.69 (45) |
8,438.06 (1.2) |
B+ |
100 |
39K |
38.96370668 (20) |
93.2581 (44) |
stable |
|
-33,807.01 (19) |
8,557.020 (5) |
|
|
40K |
39.96399848 (21) |
0.0117 (1) |
1.251 |
Gy |
-33,535.21 (19) |
8,538.083 (5) |
|
|
41K |
40.96182576 (21) |
6.7302 (44) |
stable |
|
-35,559.07 (19) |
8,576.061 (5) |
|
|
42K |
41.96240281 (24) |
|
12.36 |
h |
-35,021.56 (22) |
8,551.245 (5) |
B- |
100 |
43K |
42.9607155 (96) |
|
22.3 |
h |
-36,593.2 (8.9) |
8,576.6 (2.1) |
B- |
100 |
44K |
43.961557 (38) |
|
22.13 |
m |
-35,810 (36) |
8,547.3 (8.1) |
B- |
100 |
45K |
44.960699 (11) |
|
17.3 |
m |
-36,608 (10) |
8,554.5 (2.3) |
B- |
100 |
46K |
45.961977 (17) |
|
105 |
s |
-35,418 (16) |
8,518.1 (3.4) |
B- |
100 |
47K |
46.9616785 (85) |
|
17.5 |
s |
-35,696.3 (8) |
8,514.5 (1.7) |
B- |
100 |
48K |
47.965514 (26) |
|
6.8 |
s |
-32,124 (24) |
8,430.9 (5) |
B- |
100 |
49K |
48.967451 (75) |
|
1.26 |
s |
-30,319 (70) |
8,387 (1.4) |
B- |
100 |
50K |
49.97278 (30) |
|
472 |
ms |
-25,350 (280) |
8,281 (5.6) |
B- |
100 |
51K |
50.97638 (54) |
|
365 |
ms |
-22,000 (500) |
8,210 (10) |
B- |
100 |
52K |
51.98261 (75) |
|
105 |
ms |
-16,200 (700) |
8,100 (13) |
B- |
100 |
53K |
52.98712 (75) |
|
30 |
ms |
-12,000 (700) |
8,020 (13) |
B- |
100 |
54K |
53.99420 (97) |
|
10 |
ms |
-5,400 (900) |
7,900 (17) |
B- |
100 |
55K |
54.9997 (11) |
|
3 |
ms |
-300 (1000) |
7,810 (18) |
B- ? |
|
32mK |
32.02192 (54) |
|
|
|
20,420 (500) |
6,970 (16) |
p ? |
|
38mK |
37.96908118 (48) |
|
923.9 |
ms |
-28,800.69 (45) |
8,438.06 (1.2) |
B+ |
100 |
40mK |
39.96399848 (21) |
|
336 |
ns |
-33,535.21 (19) |
8,538.083 (5) |
IT |
100 |
38m1K |
37.96908118 (48) |
|
21.98 |
us |
-28,800.69 (45) |
8,438.06 (1.2) |
IT |
100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005