Development of an electron-ion coincidence apparatus for molecular-frame electron energy loss spectroscopy studies.

Watanabe, Noboru; Hirayama, Tsukasa; Yamada, So; Takahashi, Masahiko

Watanabe, Noboru; Hirayama, Tsukasa; Yamada, So; Takahashi, Masahiko.

Afiliación

Watanabe N; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
Hirayama T; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
Yamada S; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.
Takahashi M; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.

Rev Sci Instrum ; 89(4): 043105, 2018 Apr.

Article en En | MEDLINE | ID: mdl-29716374

RESUMEN

We report details of an electron-ion coincidence apparatus, which has been developed for molecular-frame electron energy loss spectroscopy studies. The apparatus is mainly composed of a pulsed electron gun, an energy-dispersive electron spectrometer, and an ion momentum imaging spectrometer. Molecular-orientation dependence of the high-energy electron scattering cross section can be examined by conducting measurements of vector correlation between the momenta of the scattered electron and fragment ion. Background due to false coincidences is significantly reduced by introducing a pulsed electron beam and pulsing scheme of ion extraction. The experimental setup has been tested by measuring the inner-shell excitation of N2 at an incident electron energy of 1.5 keV and a scattering angle of 10.2°.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2018 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

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