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Zinc 65

Chemical Symbol: Zn-65 Half-Life: 243.93 days
Atomic Number: 25 Decay Constant: 0.002842 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 Zn-65

Energy (keV)

Intensity (%)
344.95

0.003

770.6

0.003
1115.546

50.6

X-rays From Zn-65

Energy (keV)

Intensity (%)

Assignment

0.811 0.046

Cu Ll

0.831

0.027 Cu Lh
0.929 0.063

Cu Lα2

0.929

0.57 Cu Lα1
0.931 0.00079

Cu Lβ6

0.949

0.37 Cu Lβ1
1.022 0.019

Cu Lβ4

1.022

0.028 Cu Lβ3
7.883 2.34E-05

Cu Kα3

8.028

11.9 Cu Kα2
8.048 23.4

Cu Kα1

8.905

1.43 Cu Kβ3
8.905 2.78

Cu Kβ1

8.977

0.00327 Cu Kβ5
8.979 1.18E-07

Cu Kβ4

Betas From Zn-65

End-Point Energy (keV)

Intensity (%)

236.34

50.6

329.9

1.403
1351.9

48

 

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.