Ion-momentum imaging of dissociative-electron-attachment dynamics in CO2, N2O, HCCH and CF4

29th International Conference on Photonic, Electronic, and Atomic Collisions

Fogle, M.^1,3 ; Landers, A.L.^1,3 ; Moradmand, A.^1,3 ; Sartor, J.^1,3 ; Slaughter, D.S.^2 ; Haxton, D.J.^2 ; Rescignot, T.N.^2 ; McCurdy, C.W.^1,2,3 ; Weber, Th.^2 ; Belkacem, A.^2 ; Orel, A.E.^1,3 ; Matsika, S.^4

Department of Physics, Auburn University, Auburn

AL

36849, United States^1

Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley

CA

94720, United States^2

Department of Chemistry and Applied Science, University of California, Davis

CA

95616, United States^3

Department of Physics, Temple University, Philadelphia

PA

19122, United States^4

关键词: Ab initio;    Dissociation dynamics;    Dissociative electron attachment;    Ion momentum;    Scattering calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/7/072028/pdf
DOI  :  10.1088/1742-6596/635/7/072028

来源: IOP

【 摘 要 】

We present experimental results for dissociative electron attachment to CO2, N2O, HCCH and CF4from an ion-momentum imaging technique. From our measured ion-momentum results we extract fragment kinetic energies and angular distributions. We directly observe the dissociation dynamics associated with the formation of transitory negative ions. We compare the experimental results with ab initio electronic structure and fixed-nuclei scattering calculations and obtain good agreement.