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Answer to Question #1056 Submitted to "Ask the Experts"

Category: Radiation Basics — Beta Particles (negative and positive) and Electrons

The following question was answered by an expert in the appropriate field:

Q
Can you tell me which of the following radionuclides are Auger emitters? 109mAg, 241Am, 198Au, 7Be, 83Br, 144Ce144Pr, 242Cm, 60Co, 137Cs, 64Cu, 155Eu, 59Fe, 130I, 131I, 132I, 133I, 135I, 115mIn, 115mCd, 141La, 54Mn, 99Mo, 24Na, 95Nb, 95mNb, 239Np, 111mPd, 112Pd, 106Rh, 126Sb, 153Sm, 90Sr, 161Tb, 99mTc, 127mTe, 237U, 240U, 181W, 185W, 95Zr.
A
Auger electron emission is the result of atomic "relaxation" that can occur when an inner-shell electron vacancy is filled. It can happen in any atom that has an electron structure that supports the transition and is not peculiar to radionuclides. I believe that all elements, with the exception of hydrogen and helium, are capable of producing Auger electrons. An excellent online reference for radionuclide data can be found at the National Nuclear Data Center Web site. The Wallet Cards feature provides nuclide radiations with Auger emissions given as type [E AU].

Robert L. Coleman
Oak Ridge National Laboratory
Answer posted on 20 July 2001. The information and material posted on this Web site is intended as general reference information only. Specific facts and circumstances may alter the concepts and applications of materials and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice specific to whatever facts and circumstances are presented in any given situation. Answers are correct at the time they are posted on the Web site. Be advised that over time, some requirements could change, new data could be made available, or Internet links could change. For answers that have been posted for several months or longer, please check the current status of the posted information prior to using the responses for specific applications.
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