Continuum Distorted Wave Methods in Ion—Atom Collisions

Crothers, D S F; Dubé, Louis J.

doi:10.1016/s1049-250x(08)60177-9

Cited by 96 publications

(45 citation statements)

References 337 publications

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“…Hence the wave functions (11) and (12) fulfill requirements settled for atomic or pure three-body Coulomb collision systems [36,40]. Beyond the correct asymptotic behavior, the CDW wave function describes the active electron's moving in the combined electric field created by the projectile and target core.…”

Section: Theorymentioning

confidence: 92%

“…The CDW-EIS model is a first-order method which proved to be very successful for describing atomic collisions at medium and high impact energies [36,37] and its extension to molecular collisions have been provided in [21][22][23]30]. The effect of the projectile on the electronic state is taken into account by using the eikonal distorted-wave function,…”

Section: Theorymentioning

confidence: 99%

“…respectively, where Coulomb distortions are employed in both initial and final channels [36]. The justification of using eikonal distortion is related to incorrect normalization of the initial state with the Coulomb distortion factor, which results in overestimation of cross sections at low impact energies [38,39].…”

Section: Theorymentioning

confidence: 99%

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Single and multiple electron removal and fragmentation in collisions of protons with water molecules

et al. 2016

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Single and multiple electron removal processes (capture and ionization) in proton-H 2 O collisions have been investigated applying the continuum distorted wave with eikonal initial-state model within the framework of independent electron approach. Probabilities and cross sections for electron capture are derived from the same quantities evaluated for ionization using the continuity of transition quantities across the ionization threshold. Dissociation and fragmentation cross sections for the H 2 O q+ (q = 1-3) ions have been evaluated by considering branching ratios that include the effect of multiple electron removal transitions. The results are compared with experimental and other theoretical data in the range of impact energies from 30 kev to 5 MeV. Generally, the evaluated cross sections and fragmentation yields show good agreement with experiments at impact energies above 100-150 keV.

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Section: Theorymentioning

confidence: 92%

Section: Theorymentioning

confidence: 99%

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Single and multiple electron removal and fragmentation in collisions of protons with water molecules

et al. 2016

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“…The single particle scattering equation is solved within the framework of the CDW-EIS approximation, where unperturbed atomic orbitals in both the incoming and outgoing channels have been evaluated on the same V Li potential, see refs. [16,22,23,26] for more details. Here we note that a similar formalism, including transition amplitudes from a basis generator method calculation, was used in our recent study of excitation and ionization in the 1.5-MeV/amu O 8+ -Li collision system [27].…”

Section: Theorymentioning

confidence: 99%

“…The problem can be addressed in the distorted wave formalism [16] or in term of a polarization potential [17]. To describe the polarization potential, several functional forms have been suggested [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Differential cross sections for single ionization of Li in collisions with fast protons andO8+ions

2014

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We study the process of single ionization of Li in collisions with H + and O 8+ projectile ions at 6MeV and 1.5-MeV/amu impact energies, respectively. Using the frameworks of the independentelectron model and the impact parameter picture, fully (FDCS) and doubly (DDCS) differential cross sections are evaluated in the continuum distorted-wave with eikonal initial-state approxima- respectively. For O 8+ impact inclusion of the heavy particle (NN) interaction in the calculations is crucial and effects of polarization due to the presence of the projectile ion have also to be taken into account for getting very good agreement with the measured data. Our calculation reproduces the satellite peak structure seen in the FDCS for the Li(2s) measurement, which we explain as being formed by a combination of the binary and NN interactions.

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Magnetically quantized continuum distorted‐wave theory in atomic and molecular collisions

O'Rourke¹,

McSherry²,

Crothers³

2004

Int J of Quantum Chemistry

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ABSTRACT:The continuum distorted-wave eikonal initial-state (CDW-EIS) theory of Crothers and McCann (J Phys B 1983, 16, 3229) used to describe ionization in ion-atom collisions is generalized (G) to GCDW-EIS to incorporate the azimuthal angle dependence of each CDW in the final-state wave function. This is accomplished by the analytic continuation of hydrogenic-like wave functions from below to above threshold, using parabolic coordinates and quantum numbers including magnetic quantum numbers, thus providing a more complete set of states. At impact energies lower than 25 keVu Ϫ1 , the total ionization cross-section falls off, with decreasing energy, too quickly in comparison with experimental data. The idea behind and motivation for the GCDW-EIS model is to improve the theory with respect to experiment by including contributions from nonzero magnetic quantum numbers. We also therefore incidentally provide a new derivation of the theory of continuum distorted waves for zero magnetic quantum numbers while simultaneously generalizing it.

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Continuum Distorted Wave Methods in Ion—Atom Collisions

Cited by 96 publications

References 337 publications

Single and multiple electron removal and fragmentation in collisions of protons with water molecules

Single and multiple electron removal and fragmentation in collisions of protons with water molecules

Differential cross sections for single ionization of Li in collisions with fast protons andO8+ions

Magnetically quantized continuum distorted‐wave theory in atomic and molecular collisions

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