Modelling the transient processes produced under heavy particle irradiation

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

卷:269

Article

Lazanu, Sorina¹  Lazanu, Ionel²  Ciobanu, Gheorghe² 

[1] Natl Inst Mat Phys, Bucharest, Romania

[2] Univ Bucharest, Fac Phys, Bucharest, Romania

关键词: Energy loss;    Transient processes;    Thermal spike model;    Ions;    Semiconductors;    Astroparticle applications;   

DOI  :  10.1016/j.nimb.2010.12.064

来源: Elsevier

【 摘 要 】

A new model for the thermal spike produced by the nuclear energy loss, as source of transient processes, is derived analytically, for power law dependences of the diffusivity on temperature, as solution of the heat equation. The contribution of the ionizing energy loss to the spike is not included. The range of validity of the model is analysed, and the results are compared with numerical solutions obtained in the frame of the previous model of the authors, which takes into account both nuclear and ionization energy losses, as well as the coupling between the two subsystems in crystalline semiconductors. Particular solutions are discussed and the errors induced by these approximations are analysed. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free