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BARIUM 133

Chemical Symbol: Ba-133 Half-Life: 10.51 years
Atomic Number: 56 Decay Constant: 0.065951 years-1
Mass Number: 133 (77 neutrons) Decay Mode: Electron Capture
U.S. NRC Exempt Quantity Limit: 10 μCi (370 kBq) IAEA Exempt Quantity Limit: 2.7 μCi (100 kBq)

Gammas From Ba-133

Energy (keV) Intensity (%)
53.161 2.199
79.621 2.62
80.997 34.06
160.613 0.645
223.398 0.45
276.398 7.164
302.853 18.33
356.017 62.05
383.851 8.94

X-rays From Ba-133

Energy (keV) Intensity (%) Assignment
3.795 0.24 Cs Ll
4.142 0.11 Cs Lh
4.272 0.66 Cs Lα2
4.286 6 Cs Lα1
4.62 3.8 Cs Lβ1
4.649 0.56 Cs Lβ4
4.717 0.93 Cs Lβ3
4.781 0.048 Cs Lβ6
4.934 1.19 Cs Lβ2
5.281 0.54 Cs Lγ1
5.542 0.15 Cs Lγ2
5.553 0.22 Cs Lγ3
30.27 0.00401 Cs Kα3
30.625 34.9 Cs Kα2
30.973 64.5 Cs Kα1
34.92 5.99 Cs Kβ3
34.987 11.6 Cs Kβ1
35.252 0.123 Cs Kβ5
35.818 3.58 Cs Kβ2
35.907 0.74 Cs Kβ4

Betas From Ba-133

End-point Energy (keV) Intensity (%)
80.39 86
133.55 14


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.