RADIONUCLIDE DATA SHEET CARBON 14 Chemical Symbol: C-14 Half-Life: 5700 years Atomic Number: 6 Decay Constant: 0.000122 years-1 Mass Number: 14 (8 neutrons) Decay Mode: Beta U.S. NRC Exempt Quantity Limit: 100 μCi (3700 kBq) IAEA Exempt Quantity Limit: 270 μCi (10000 kBq) Betas From C-14 End-Point Energy (keV) Intensity (%) 156.48 100 C-14 Decay Scheme Page 1 of 2 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 Page 2 of 2
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