Lattice location of O¹⁸ in ion implanted Fe crystals by Rutherford backscattering spectrometry, channeling and nuclear reaction analysis

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• 作者：Mathayan Vairavel ; Balakrishnan Sundaravel ; ^{bsundar@igcar.gov.in" class="auth_mail" title="E-mail the corresponding author} ; Binaykumar Panigrahi
• 关键词：Oxygen interstitial ; Ion implantation ; Ion channeling
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2016
• 出版时间：15 September 2016
• 年：2016
• 卷：383
• 期：Complete
• 页码：47-51
• 全文大小：514 K

文摘

There are contradictory theoretical predictions of lattice location of oxygen interstitial atom at tetrahedral and octahedral interstices in bcc Fe. For validating these predictions, 300 keV O¹⁸ ions with fluence of 5 × 10¹⁵ ions/cm² are implanted into bcc Fe single crystals at room temperature and annealed at 400 °C. The Rutherford backscattering spectrometry (RBS) and nuclear reaction analysis (NRA)/channeling measurements are carried out with 850 keV protons. The lattice location of implanted O¹⁸ is analysed using the α-particles yield from O¹⁸(p,α)N¹⁵ nuclear reaction. The tilt angular scans of α-particle yield along 〈110〉 and 〈100〉 axial directions are performed at room temperature. Lattice location of O¹⁸ is found to be at tetrahedral interstitial site by comparing the experimental scan with simulated scans using FLUX7 software.