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Cadmium 109

Chemical Symbol: Cd-109 Half-Life: 461.9 days
Atomic Number: 48 Decay Constant: 0.001501 days-1
Mass Number: 109 (61 neutrons) Decay Mode: Electron Capture
U.S. NRC Exempt Quantity Limit: 10 μCi (370 kBq) IAEA Exempt Quantity Limit: 27 μCi (1000 kBq)

Gammas From Cd-109

Energy (keV)

Intensity (%)
88.04

3.61

X-rays From Cd-109

Energy (keV)

Intensity (%) Assignment
2.634 0.18

Ag Ll

2.806

0.097 Ag Lh
2.978 0.50

Ag Lα2

2.984

4.5 Ag Lα1
3.151 2.6

Ag Lβ1

3.203 0.14

Ag Lβ4

3.234

0.22 Ag Lβ3
3.256 0.030

Ag Lβ6

3.348

0.58 Ag Lβ2
3.52 0.28

Ag Lγ1

3.743

0.027 Ag Lγ2
3.75 0.045

Ag Lγ3

21.708

0.00122 Ag Kα3
21.99 29.5

Ag Kα2

22.163

55.7 Ag Kα1
24.912 4.76

Ag Kβ3

24.943

9.2 Ag Kβ1
25.144 0.067

Ag Kβ5

25.455

2.30 Ag Kβ2
25.511 0.487

Ag Kβ4

Betas From Cd-109

End-Point Energy (keV)

Intensity (%)
125.97

100


Reference(s):

  • Health Physics and Radiological Health, 4th Edition by Thomas E. Johnson PhD, Brian K. Birky Ph.D.
  • National Nuclear Data Center database – http://www.nndc.bnl.gov/
  • Table of Radioactive Isotopes (ToRI) database – http:/nucleardata.nuclear.lu.se/nucleardata/toi/

 

Prepared by:

Spectrum Techniques, LLC.