RADIONUCLIDE
DATA SHEET
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
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5.947
1.72
Cr Kβ1
5.987
0.00066
Cr Kβ5
Betas From Mn-54
End-Point Energy (keV)
Intensity (%)
542.24
100
Mn-54 Decay Scheme
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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.
106 Union Valley Road
Oak Ridge, TN 37830
Phone: 865.482.9937
Fax: 865.483.0473
Email: [email protected]
Website: www.spectrumtechniques.com
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