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