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- W2001904971 abstract "Loss of low-Z elements (H, C, N, O, etc.) during heavy ion Elastic Recoil Detection Analysis (ERDA) has been investigated for various molecular target materials, using beams of 79Br, 127I, 197Au and 209Bi at 1.1 MeV/amu. Ceramic targets such as Nb2O5 and UO2 exhibit negligible oxygen loss even at fluences 100 times larger than that typically required during ERDA to determine the stoichiometry of a given material (1012–1013 ions/cm2). However, silicon oxynitride targets and various organic materials (photoresist, polyethylene and polycarbonate films) exhibit observable losses of hydrogen, nitrogen, oxygen and even carbon in some cases. Thus ERDA of such materials requires small corrections to determine the original target composition. For all beams, the energy loss of the incident ion due to nuclear stopping is far too small to be responsible for the observed elemental depletion; hence the much larger electronic stopping must be the primary cause. In the silicon oxynitride and photoresist targets, the observed loss rates of H, C, N or O, normalised by the corresponding recoil cross section σR, are roughly the same for all four beams. At a constant velocity of 1.1 MeV/amu, σR depends approximately on Z12 and the electronic energy loss is approximately proportional to Z1. We therefore conclude that the depletion rate of low-Z elements also depends roughly on the square of the electronic energy loss." @default.
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- W2001904971 date "1998-03-01" @default.
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- W2001904971 title "Radiation damage during heavy ion elastic recoil detection analysis of insulating materials" @default.
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- W2001904971 doi "https://doi.org/10.1016/s0168-583x(97)00886-0" @default.
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