Radionuclide

Energy (keV)

Intensity (%)

Uncertainty (keV)

U-238 series

²³⁴Th

^234mPa

63.3

92.4

1001

3.70

4.25

0.837

0.40

0.28

0.10

²²⁶Ra

186.21

3.64

0.04

²¹⁴Pb

295.22

351.93

18.42

35.60

0.04

0.07

²¹⁴Bi

609.32

1120.29

1377.67

1764.49

45.49

14.92

3.99

15.30

0.16

0.03

0.01

0.03

²¹⁰Pb

46.54

4.25

0.04

Th-232 series

²²⁸Ac

270.24

338.32

911.20

964.77

968.97

1588.2

3.46

11.27

25.80

4.99

15.80

3.22

0.06

0.09

0.4

0.09

0.3

0.08

²¹²Pb

238.63

300.09

43.60

3.30

0.5

0.04

²¹²Bi

727.33

6.67

²⁰⁸Tl

583.19

860.56

2614.51

85.0

12.5

99.75

0.3

0.1

0.004

U-235 series

²³⁵U

143.76

163.33

185.71

205.31

10.96

5.08

57.20

5.01

0.14

0.06

0.8

0.07