The stopping power and energy straggling of light ions in graphene oxide foils

0479632 - ÚJF 2018 RIV NL eng J - Journal Article
Mikšová, Romana - Macková, Anna - Malinský, Petr - Sofer, Z.
The stopping power and energy straggling of light ions in graphene oxide foils.
Nuclear Instruments & Methods in Physics Research Section B. Roč. 406, SEP (2017), s. 173-178. ISSN 0168-583X. E-ISSN 1872-9584
R&D Projects: GA MŠMT LM2015056; GA ČR GA16-05167S
Institutional support: RVO:61389005
Keywords : ion energy loss * ion energy straggling * graphene oxide
OECD category: Nuclear physics
Impact factor: 1.323, year: 2017

Energy-loss and straggling experiments were performed using 2-4 MeV H-1(+) and 7.4-9.0 MeV He-4(2+) ions in graphene oxide foils by the transmission technique. The thickness of the graphene oxide foils was determined using a detailed image analysis of a graphene oxide cut, which was used to refine the graphene oxide density. The density was determined by the standard technique of micro-balance weighing. The stoichiometry of the graphene oxide foils before the irradiation was determined by Rutherford backscattering spectrometry (RBS) and elastic recoil detection analysis (ERDA) using 2 and 2.5 MeV He-4(+). The measured energy stopping powers for hydrogen and helium ions in graphene oxide were compared with the predictions obtained from the SRIM-2013 code. The energy straggling was compared with that calculated using Bohr's, Bethe-Livingston and Yang predictions.

The results show that the stopping power of graphene oxide foils irradiated by both ion species decreases with increasing energies, the differences between the measured and predicted values being below 3.8%. The energy straggling determined in our experiment is higher than Bohr's and Bethe-Livingston predicted values, the predictions by Yang are in better agreement with our experiment.
Permanent Link: http://hdl.handle.net/11104/0275607