Double and single differential cross sections for secondary electron production in 6.0 MeV/u O8+ + H2O collisions

28th International Conference on Photonic, Electronic and Atomic Collisions

Ohsawa, D.^1 ; Tawara, H.^2 ; Soga, F.^3 ; Galassi, M.E.^4 ; Rivarola, R.D.^4

Radioisotope Research Center, Kyoto University, Kyoto

606-8502, Japan^1

National Institute for Fusion Science, Toki

509-5292, Japan^2

National Institute of Radiological Sciences, Chiba

263-8555, Japan^3

Instituto de Física Rosario, CONICET and Universidad Nacional de Rosario, Rosario, Argentina^4

关键词: Energy ranges;    Ionizing power;    Secondary electrons;    Single-differential cross sections;    Theoretical calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/10/102030/pdf
DOI  :  10.1088/1742-6596/488/10/102030

来源: IOP

【 摘 要 】

We discuss double and single differential cross sections (DDCSs and SDCS) for secondary electron production (30-1000 eV and 20-160°) in collisions of 6.0 MeV/u O8+ions with water vapor. All the DDCSs and SDCS were compared with previous experimental results obtained with 6.0 MeV/u C6+ions. The DDCSs of O8+ions showed nearly symmetric angular distributions around 90° in the energy range of 30-700 eV, which was quite consistent with those of C6+ions, while the SDCS of O8+ions showed about 1.7 times larger yield than that of C6+ions, due to a greater ionizing power of high-Z projectile. Comparison with theoretical calculations using CDW-EIS is also presented at the conference.