EBS/C proton spectra from a virgin diamond crystal

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

卷:381

Article

Erich, M.¹  Kokkoris, M.²  Fazinic, S.³  Petrovic, S.¹ 

[1] Univ Belgrade, Vinca Inst Nucl Sci, Phys Lab, POB 552, Belgrade, Serbia

[2] Natl Tech Univ Athens, Dept Phys, Zografou Campus, Athens 15780, Greece

[3] Rudjer Boskovic Inst, Dept Expt Phys, Lab Ion Beam Interact, Bijenicka Cesta 54, Zagreb 10000, Croatia

关键词: EBS/C;    Dechanneling;    Diamond;    Carbon;    Computer simulation;   

DOI  :  10.1016/j.nimb.2016.05.030

来源: Elsevier

【 摘 要 】

In the present work, elastic backscattering channeling spectra, EBS/C, of protons in a (100) diamond crystal were experimentally and theoretically studied via a new computer simulation code. Proton incident energies for EBS/C spectra were in the energy range from 1.0 MeV to 1.9 MeV. The energy range was chosen in order to explore a distinct strong resonance of the C-12(p,p(0))C-12 elastic scattering at 1737 key. The computer simulation code applied for the fitting of the experimental spectra in the random mode was compared with the corresponding SIMNRA results. In the channeling mode, it assumes a Gompertz type sigmoidal dechanneling function, which has two fitting parameters, x(c), and k, the dechanneling range and rate, respectively. It also uses a, ratio of the channeling to random energy losses, as a fitting parameter. It was observed that x(c) increases, k decreases and a stays relatively constant with the proton incident energy. These observations confirm the physical interpretation of the fitting parameters. Also, they constitute the basics for the further development of the code for the quantification of induced amorphization and depth profiling of implanted ions. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free