Presentation Information
[18a-W9_323-9]Combined energy and TOF analyses of low-energy elastic recoil detection for analyzing surface hydrogen
〇Taku Suzuki1, Isao Sakaguchi1, Soshi Iimura1, Tomoaki Nishimura2, Bun Tsuchiya3 (1.NIMS, 2.Hosei Univ., 3.Meijo Univ.)
Keywords:
hydrogen,ion beam analysis
Low-energy elastic recoil detection analysis (low-energy ERDA) is a well-established surface analysis technique that uses a low-energy noble gas ion beam to study the atomic occupancy sites of light elements, such as hydrogen. In this method, recoiled particles are analyzed either by energy spectroscopy or by a time-of-flight (TOF) technique. However, two issues arise when applying low-energy ERDA to analyze surface hydrogen: (1) unavoidable surface contamination by residual hydrogen and (2) peak overlaps. The first issue can be addressed by using a hydrogen isotope, such as deuterium. Nonetheless, using deuterium introduces peak overlaps among recoil hydrogen, recoil deuterium, and the large scattering component. This complicates estimating the recoil deuterium yield, which is essential for analyzing the occupancy sites. The present study demonstrates that simultaneous TOF and energy analyses (TOF+EA) can overcome these challenges.