Coincident detection of electrons ejected at large angles and target recoil ions produced in multiply ionizing collisions for the 1-MeV/u<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">q</mml:mi><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>+Ar collision system

Gaither, C.C.; Breinig, M.; Berryman, J.W.; Hasson, B.F.; Richards, John D.; Price, Kyle

doi:10.1103/physreva.47.3878

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1994

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“…The spectrometer is one of four analyzers of a multispectrometer apparatus previously described [14]. The gas cell of this apparatus has a length of 13 mm.…”

Section: And Proceduresmentioning

confidence: 99%

Backward ejected electrons produced by 1-MeV/uOq+(q=3–8) projectile ions colliding with argon gas

Breinig¹,

Berryman²,

Segner³

et al. 1994

Phys. Rev. A

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The cross sections for ejecting electrons into a cone of half-angle -2' centered on the backward direction have been measured as a function of electron energy for 1-MeV/u Oq+ (q =3-8) projectiles colliding with Ar. For 0'+ and 0 + projectiles, the cross sections have also been measured in coincidence with exit charge states (q +1) and (q +2) of the projectile. A prominent feature in all spectra is a target LMM Auger peak. The cross sections for producing Ar LMM Auger electrons are nearly independent of projectile incident charge states. A projectile electron-loss peak is produced when the projectile brings loosely bound L-shell electrons into the collision. The shape of this peak is independent of the projectile exit charge state within experimental error. The measured electron-loss production cross sections at 180 are compared with the predictions of various on-shell approximations to the impulse approximation. Peak height and position are sensitive functions of the on-shell approximation used. The predictions of the elastic scattering model agree well with the data.

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“…The spectrometer is one of four analyzers of a multispectrometer apparatus previously described [14]. The gas cell of this apparatus has a length of 13 mm.…”

Section: And Proceduresmentioning

confidence: 99%