Coincidence measurements of slow recoil ions with projectile ions in 42-MeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ar</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">q</mml:mi><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-Ar collisions

Tonuma, T.; Kumagai, H.; Matsuo, Takashi; Tawara, H.

doi:10.1103/physreva.40.6238

Cited by 28 publications

(17 citation statements)

References 18 publications

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“…The ratio of cross-sections for 2-and for 1-capture is found to be 0.24. This value is comparable to those quoted by earlier investigators [20,21].…”

Section: The Charge Changing Cross-sectionssupporting

confidence: 93%

“…Similar shifts have also been observed by other investigators [20,28] and have been explained by considering the fact that the magnitude of ionization due to vacancy cascades which follow the production of two holes in the Ä-shell is much larger than those due to the production of one hole. However, a small increase is noted in the recoil fractions for the two processes.…”

Section: Recoil Ion Fraction and Average Charge Statesupporting

confidence: 66%

“…Corresponding to each additional electron lost by the projectile during the interaction, the average of the charge state of the recoil ions increases by unity (see, figure 5d). This feature, as observed by other workers also [20,28], points to the fact that with the increasing number of the lost electrons from the projectile during the interaction, an additional electron is ejected from the same shell of the argon atom as it happens in the case of 1-electron loss. The average recoil ion charge state (see figure 8a and 8b) increases with the charge state of the incident projectile.…”

Section: Recoil Ion Fraction and Average Charge Statementioning

confidence: 53%

“…One of the interesting features observed for Si ½¼· ion interacting with argon is that the recoil ion distributions for 1 -capture and for 1 -loss processes are similar for the same average recoil charge state. This observation suggests that both, the loss ionization and the capture ionization processes occur at the similar impact parameters [20]. …”

Section: Recoil Ion Cross-sectionsmentioning

confidence: 88%

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Multiple ionization of argon in coincidence with projectile ions in 60–120 MeV Si q+-Ar collisions

et al. 1999

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A projectile ion-recoil ion coincidence technique has been employed to study the multiple ionization and the charge transfer processes in collisions of 60-120 MeV Si Õ· (Õ -½ ) ions with neutral argon atoms. The relative contribution of different ionization channels, namely; direct ionization, electron capture and electron loss leading to the production of slow moving multiply charged argon recoil ions have been investigated. The data reported on the present collision system result from a direct measurement in the considered impact energy for the first time. The total ionization cross-sections for the recoil ions are shown to scale as Õ ½ / ¼ Ô , where Ô is the energy in MeV of the projectile and Õ its charge state.The recoil fractions for the cases of total-and direct ionizations are found to decrease with increasing recoil charge state . The total ionization fractions of the recoils are seen to depend on Õ and to show the presence of a 'shell-effect' of the target. Further, the fractions are found to vary as ½ ¾ upto · . The average recoil charge state increases slowly with Õ and with the number of lost or captured electrons from or into the projectile respectively. The projectile charge changing cross-sections Õ Õ ¼ are found to decrease with increasing Õ for loss ionization and to increase with Õ for direct-and capture ionization processes respectively. The physics behind various scaling rules that are found to follow our data for different ionization processes is reviewed and discussed.

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“…The ratio of cross-sections for 2-and for 1-capture is found to be 0.24. This value is comparable to those quoted by earlier investigators [20,21].…”

Section: The Charge Changing Cross-sectionssupporting

confidence: 93%

Section: Recoil Ion Fraction and Average Charge Statesupporting

confidence: 66%

Section: Recoil Ion Fraction and Average Charge Statementioning

confidence: 53%

Section: Recoil Ion Cross-sectionsmentioning

confidence: 88%

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Multiple ionization of argon in coincidence with projectile ions in 60–120 MeV Si q+-Ar collisions

et al. 1999

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“…The gas target absolute pressure in set-ups based on a differentially gas cell can be measured directly with a capacitive manometer gauge. 3,8,9,15,21 We illustrate the method presenting measurements of ionization of helium atom, resulting from collisions with C 3 + ions. In order to check the accuracy of our method, we compare our results to the works of Santos and co-workers, 2 where a time of flight spectrometer inside a gas cell target was used to study the collision between C 3 + and rare gas atoms.…”

Section: Introductionmentioning

confidence: 99%

Electron-recoil ion and recoil ion-projectile coincidence techniques applied to obtain absolute partial collision cross sections

Wolff

Souza

Tavares

et al. 2012

Review of Scientific Instruments

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We present in detail an alternative experimental set-up and data analysis, based on the electron-recoil ion and recoil ion-projectile coincidence techniques, that enable the measurement of partial pure ionization and partial charge exchange cross sections for an effusive gas jet set-up, where the absolute target density and recoil ion efficiency cannot be measured directly. The method is applied to the ionization of helium atoms due to collision with partially stripped C(3 +) projectiles. In order to check the method, the results are compared to data available in the literature where the target density and recoil ion detection efficiency were measured directly. The pure ionization channel is compared to the electron capture channel.

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Electron Loss and Capture Processes in Collisions of Heavy Many-Electron Ions with Neutral Atoms

Shevelko

Litsarev

Stöhlker

et al. 2012

Atomic Processes in Basic and Applied Physics

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Coincidence measurements of slow recoil ions with projectile ions in 42-MeVArq+-Ar collisions

Cited by 28 publications

References 18 publications

Multiple ionization of argon in coincidence with projectile ions in 60–120 MeV Si q+-Ar collisions

Multiple ionization of argon in coincidence with projectile ions in 60–120 MeV Si q+-Ar collisions

Electron-recoil ion and recoil ion-projectile coincidence techniques applied to obtain absolute partial collision cross sections

Electron Loss and Capture Processes in Collisions of Heavy Many-Electron Ions with Neutral Atoms

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