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Manganese 54

Chemical Symbol: Mn-54 Half-Life: 312.2 days
Atomic Number: 25 Decay Constant: 0.00222 days-1
Mass Number: 54 (29 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 Mn-54

Energy (keV)

Intensity (%)
834.848

99.976

X-rays From Mn-54

Energy (keV)

Intensity (%) Assignment
0.500 0.033

Cr Ll

0.510

0.024 Cr Lh
0.572 0.020

Cr Lα2

0.572

0.18 Cr Lα1
0.575 0.00075

Cr Lβ6

0.581

0.14 Cr Lβ1
0.652 0.010

Cr Lβ4

0.652

0.015 Cr Lβ3
5.295 4.9E-06

Cr Kα3

5.405

7.7 Cr Kα2
5.415 15.3

Cr Kα1

5.947

0.88 Cr Kβ3
5.947 1.72

Cr Kβ1

5.987

0.00066

Cr Kβ5

Betas From Mn-54

End-Point Energy (keV)

Intensity (%)
542.24

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.