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A combined electron-ion spectrometer for studying complete kinematics of molecular dissociation upon shell selective ionization
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10.1063/1.4811796
/content/aip/journal/rsi/84/7/10.1063/1.4811796
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/7/10.1063/1.4811796
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The combined electron ion spectrometer. The horizontal thick dashed line denotes the projectile beam molecular beam plane. The slits of the CMA are shown exaggerated for clarity. The figure is approximately to scale.

Image of FIG. 2.
FIG. 2.

Simulated trajectories of C, N, and O ions with 7 eV initial kinetic energy. Black contours are the equipotential lines.

Image of FIG. 3.
FIG. 3.

Simulated trajectory of electrons with 70 eV energy. Middle one (green) is the trajectory for electrons with ideal angle of ejection. Outer (red) and inner (blue) trajectories are for electrons with ejection angle varying by +2° and −2° respectively from the ideal ejection angle. Black contours are the equipotential lines.

Image of FIG. 4.
FIG. 4.

Electron spectrum of Argon at 155 eV photon energy. The dots are the experimental data. The black line is generated by Savitzky–Golay smoothing. The 3 and 3 binding energy values are taken from the NIST database, while positions of the satellite lines are taken from Kikas

Image of FIG. 5.
FIG. 5.

Time of flight spectrum of Argon corresponding to ionization of 3 shell by 155 eV photons.

Image of FIG. 6.
FIG. 6.

Auger electron spectrum of Argon at 250.6 eV photon energy. The dots are the experimental data. The black line is generated by 5-point Savitzky–Golay smoothing. Line identification is done following Werme.

Image of FIG. 7.
FIG. 7.

Time of flight spectrum of Argon corresponding to ( , ), ( , ) Auger transitions. The small Ar signal is due to the electron continuum which lies under the Auger peak.

Image of FIG. 8.
FIG. 8.

Electron spectrum of CO at 155 eV photon energy. Dots are experimental data. The black curve is the sum of multiple Gaussian fits, the latter shown by dashed curves. The fit extends only up to the double ionization threshold, as beyond this energy the two ejected electrons share the energy continuously, leading to a continuum distribution. and indicate the single and double ionization potentials, taken from the NIST database and Hochlaf , respectively. Line identification in the range 22 eV – 40 eV follows Eland

Image of FIG. 9.
FIG. 9.

Time of flight spectrum of CO corresponding to different excitation energies as described in the text.

Image of FIG. 10.
FIG. 10.

Kinetic Energy Release distribution for the channel CO → O + C corresponding to different excitation energies as described in the text. Curves are offset for clarity.

Image of FIG. 11.
FIG. 11.

Ion-ion correlation map for the channel CO → C + O, which opens when the excitation energy is just above the double ionization threshold (case (c) described in the text). The inset shows the kinetic energy release distribution for this channel.

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/content/aip/journal/rsi/84/7/10.1063/1.4811796
2013-07-01
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A combined electron-ion spectrometer for studying complete kinematics of molecular dissociation upon shell selective ionization
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/7/10.1063/1.4811796
10.1063/1.4811796
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