Coincidence Measurements of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ne</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-Ne Collisions

Kessel, Q. C.; McCaughey, Michael P.; Everhart, E.

doi:10.1103/physrev.153.57

Cited by 41 publications

(7 citation statements)

References 25 publications

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“…The present study of Kr + -Kr collisions is parallel to two recent coincidence investigations, the first a study 1 of Ar + -Ar, and the second a study 2 of Ne + -Ne. The results are analyzed according to the statistical model of Everhart and Kessel.…”

Section: Introductionsupporting

confidence: 52%

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Coincidence Measurements of Krypton-Krypton Collisions

1968

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In collisions of Kr + ions with Kr atoms at keV energies, both particles from the same encounter are recorded in coincidence. The charge states m of the scattered particle and n of the recoil particle are measured, and the relative probability of such an (m, n) event is determined, together with the inelastic energy loss associated with that event. These data are analyzed using the statistical model of Everhart and Kessel. This model, which assumes m and n to be statistically independent of each other, fits the data fairly well. Ionization potentials for Kr +5 through Kr +9 are estimated from the data curves as interpreted by the statistical model. There is an active region in the Kr + -Kr data at 25-keV incident energy and 9° scattering where the inelastic energy changes suddenly, and other anomalous effects are found. This is compared and contrasted with active regions previously found in Ne + -Ne and Ar + -Ar data.

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Section: Introductionsupporting

confidence: 52%

“…is obtained by differentiating Eq. (2). ] Except for this isotope contribution, data reduction to obtain natural linewidths from the measured linewidths is the same as that given in the Ar^-Ar study.…”

Section: Linewidthsmentioning

confidence: 99%

Coincidence Measurements of Krypton-Krypton Collisions

1968

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“…In the second half on the sixties similar other measurements were also published: e.g. Kessel et al, 1966;Kessel et al, 1967;McCaughey et a I ., 1968. In the seventies the research work in this field was broadened very much. The experimental techniques were improved in several respects.…”

Section: Short History Of the Stud I Es On I On-i Nd Uced Auger Elmentioning

confidence: 79%

Ion-Induced Auger Electron Processes in Gases

Berényi

1988

X-Ray Spectroscopy in Atomic and Solid State Physics

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“…Figure 1(b) shows Q plotted versus the distance of closest approach for the I-Xe combination. Previous measurements for Ne + -Ne, 7 Fig. 1(b) do force these inner two shells to interpenetrate, and the average x-ray absorption edges of these L andM shells are approximately 5.1 and 0.9 keV, respectively.…”

mentioning

confidence: 97%

“…6 The energy scale is calibrated by assuming the peak on the dissociative-attachment cross section occurs at 9.9 eV. 7 This mode of operation is much like that used by Rapp and Briglia. 8 In Fig.…”

mentioning

confidence: 99%

Inelastic Energy Loss and X-ray Emission in Large-Angle Atomic Collisions

Kessel¹,

Rose²,

Гродзинс

1969

Phys. Rev. Lett.

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Unusually large inelastic energy losses have been measured for single collisions of argon ions with argon atoms and of iodine ions with xenon atoms using ion energies from 0.5 to 6 MeV and scattering angles from 4 to 20 deg. These losses, as high as 28 keV, are attributed in part to the production of inner-shell vacancies. The measurement of the energies of x rays from these collisions support this hypothesis.When heavy ions collide at energies greater than a few keV, their outer shells of electrons interpenetrate. During such a process, electrons in these shells may become excited, thus transferring some of the collision's kinetic energy to potential energy. A measurement of this inelastic energy loss Q is thus a measurement of the excitation energy transferred to the two atoms by the collision. Nearly all experiments concerning the collisions of heavy ions with heavy atoms investigate only the excitation of the one or two outermost electron shells, and these collisions usually result in inelastic losses of less than 2 keV. The purpose of the present experiment was to study the effects which arise when the innermost electron shells of heavy ions interpenetrate. Projectiles having energies up to 6 MeV were used and the study was limited to those collisions in which the incident ions were deflected through large (4-20 deg) angles. It was found, for example, that 1.5-MeV Ar + -Ar collisions, which force the argon K shells to interpenetrate, produce a sudden increase in Q. This increase can be attributed to the collisional production of a /C-shell vacancy. For the I w+ -Xe collisions, some Q values of nearly 30 keV were observed, and again, much of this loss must be due to the production of L-and M-shell vacancies during the collision.A 3-MV tandem Van de Graaff accelerator provided Ar + ions with energies from 0.5 to 1.5 MeV, I 2 + ions at 3 MeV, and I*+ ions at 6 MeV. The coincidence method 1 was used to determine

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Coincidence Measurements ofNe+-Ne Collisions

Cited by 41 publications

References 25 publications

Coincidence Measurements of Krypton-Krypton Collisions

Coincidence Measurements of Krypton-Krypton Collisions

Ion-Induced Auger Electron Processes in Gases

Inelastic Energy Loss and X-ray Emission in Large-Angle Atomic Collisions

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