Annealing behaviour of ion tracks in olivine, apatite and britholite

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• 作者：B. Afra^a ; M. Lang^b ; T. Bierschenk^a ; M.D. Rodriguez^a ; W.J. Weber^c ; ^d ; C. Trautmann^e ; ^f ; R.C. Ewing^b ; N. Kirby^g ; P. Kluth^a ; ^{patrick.kluth@anu.edu.au" class="auth_mail}
• 关键词：SAXS ; Ion track ; Apatite ; Olivine ; Britholite ; Activation energy
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：1 May, 2014
• 年：2014
• 卷：326
• 期：Complete
• 页码：126-130
• 全文大小：1403 K

文摘

Ion tracks were created in olivine from San Carlos, Arizona (95% Mg₂SiO₄), apatite (Ca₅(PO4)₃(F,Cl,O)) from Durango, Mexico, and synthetic silicates with the apatite structure: Nd₈Sr₂(SiO₄)₆O₂ and Nd₈Ca₂(SiO₄)₆O₂ using 1.6 and 2.2 GeV Au ions. The morphology and annealing behaviour of the tracks were investigated by means of synchrotron based small angle X-ray scattering in combination with ex situ annealing. Tracks in olivine annealed above 鈭?00 掳C undergo a significant change in track radius due to recrystallisation of the damage tracks. At temperatures higher than 620 掳C, the scattering images indicate fragmentation of the track cylinders into smaller subsections. Ion tracks were annealed at elevated temperatures up to 400 掳C in the Durango and Ca-britholite, and up to 560 掳C in Sr-britholite. While there was a significant change in the track radii in the Durango apatite, tracks in the two synthetic samples remained almost unchanged.