ID #

Nuclide

Half-life (yr)

Decay Mode

Variation

Technique

Mag of Modul

Peak Day

Author

Organization

1

226Ra

1600

alpha decay

Annual

ABSOLUTE

~1.5E−3

30

Siegert [1]

PTB

2

154Eu

8.59

beta minus decay

Annual

ABSOLUTE

~1.5E−3

30

Siegert [1]

PTB

1-2

NO

RATIO 1:2

0

NA

Siegert [1]

PTB

3

238Pu

78.74

alpha decay

Annual

ABSOLUTE

~2E−3

−15

Ellis [2]

Baylor College

4

3H

12.3

beta minus decay

Annual

ABSOLUTE

3.7E−3

45

Falkenberg [3]

Unknown

5

32Si

170

beta minus decay

Alburger [4]

Brookhaven

6

36Cl

3.01E+05

beta minus decay

Annual

RATIO 5:6

0.7E−3

40

Alburger [4]

Brookhaven

7

54Mn

312d

beta capture

Annual

ABSOLUTE

~1E−3

NA

Jenkins [5]

Purdue

8

60Co

5.27

beta minus decay

Annual

ABSOLUTE

~1.5E−3

~90

Parkhomov [6]

Moscow State

9

90Sr

28.9

beta minus decay

Annual

ABSOLUTE

~1.5E−3

~60

Parkhomov [6]

Moscow State