On the beta decay-induced radiation damage

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:467

Article

Chen, Shengli^1,2  Bernard, David¹ 

[1] CEA, DEN, DER, SPRC,LEPh, F-13108 St Paul Les Durance, France

[2] Univ Grenoble Alpes, I MEP2, F-38402 St Martin Dheres, France

关键词: Displacement per Atom;    Beta decay;    Electron spectrum;    Residual nucleus;    Neutrino;   

DOI  :  10.1016/j.nimb.2020.01.017

来源: Elsevier

【 摘 要 】

The present work proposes the methods to calculate beta decay-induced atomic displacement damage, including the emitted electron-induced damage and the residual nucleus-induced damage using three-body kinematics. Compared with the standard Norgett-Robinson-Torrens (NRT) metric of the number of Displacements per Atom (DPA), the modified NRT proposed in the present work based on the definition of threshold displacement energy leads to 36% more DPA induced by the emitted electron of Mn-56 beta decay. The example of Mn-56 beta decay shows that the emitted electron-induced DPA is fewer than the DPA induced by the residual nucleus by a factor of 14. The residual recoil energy should be taken into account for elements such as iron, nickel, chromium, aluminum, and especially for silicon, whereas the maximum kinetic energy of beta decay residual is below the threshold of atomic displacement for tungsten.

【 授权许可】

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