Fully differential cross sections for C<sup>6+</sup>single ionization of helium: the role of nucleus–nucleus interaction

Ciappina, M. F.; Cravero, Walter Rubén

doi:10.1088/0953-4075/39/9/007

Cited by 26 publications

(37 citation statements)

References 29 publications

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“…where ν = Z P Z T /v is a Sommerfeld parameter, and Z T is the asymptotic charge of the target ion T . Using the two-dimensional Fourier transforms, the corresponding probability amplitudes in the momentumspace can be obtained as [19,42]…”

Section: Theorymentioning

confidence: 99%

Fully differential cross sections for Li²⁺-impact ionization of Li(2s) and Li(2p)

Ghorbani¹,

Ghanbari-Adivi²,

Ciappina³

2018

J. Phys. B: At. Mol. Opt. Phys.

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A semiclassical impact parameter version of the continuum distorted wave-Eikonal initial state theory is developed to study the differential ionization of Li atoms in collisions with Li 2+ ions. Both post and prior forms of the transition amplitude are considered. The fully differential cross sections are calculated for the lithium targets in their ground and their first excited states and for the projectile ions at 16 MeV impact energy. The role of the internuclear interaction as well as the significance of the post-prior discrepancy in the ejected electron spectra are investigated. The obtained results for ejection of the electron into the azimuthal plane are compared with the recent measurements and with their corresponding values obtained using a fully quantum mechanical version of the theory. In most of the cases, the consistency of the present approach with the experimental and the quantum theoretical data is reasonable. However, for 2p-state ionization, in the cases where no experimental data exist, there is a considerable difference between the two theoretical approaches. This difference is questionable and further experiments are needed to judge which theory makes a more accurate description of the collision dynamics.

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Section: Theorymentioning

confidence: 99%

Fully differential cross sections for Li²⁺-impact ionization of Li(2s) and Li(2p)

Ghorbani¹,

Ghanbari-Adivi²,

Ciappina³

2018

J. Phys. B: At. Mol. Opt. Phys.

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“…The theoretical work that was carried out on the C 6+ and Au 24+/53+ systems has been dominated by the continuum distorted-wave eikonal-initial-state approximation (CDW-EIS) [1][2][3][4][5][6][7][8][9][10][11]18,21,23,25,27,[30][31][32][33]35,39,40], its earlier CDW incarnation [11,14,16,17,22,37], or related approximations [19,21,26,27,39,41], and by the classical trajectory Monte Carlo method (CTMC) [7,10,[12][13][14][15][16]19,[35][36][37][38]. Clearly, therefore, there is scope for a fresh approach.…”

Section: Introductionmentioning

confidence: 99%

Coincidence studies of He ionized byC6+,Au24+, and
McGovern
¹
,
Assafrão
²
,
Mohallem
³

et al. 2010
Phys. Rev. A

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A recently developed [Phys. Rev. A 79, 042707 (2009)] impact parameter coupled pseudostate approximation (CP) is applied to calculate triple differential cross sections for single ionization of He by C 6+ , Au 24+ , and Au 53+ projectiles at impact energies of 100 and 2 MeV/amu for C 6+ and 3.6 MeV/amu for Au 24+ and Au 53+ . For C 6+ , satisfactory, but not perfect, agreement is found with experimental measurements in coplanar geometry, but there is substantial disagreement with data taken in a perpendicular plane geometry. The CP calculations firmly contradict a projectile-nucleus interaction model which has been used to support the perpendicular plane measurements. For Au 24+ and Au 53+ , there is a complete lack of accord with the available experiments. However, for Au 24+ the theoretical position appears to be quite firm with clear indications of convergence in the CP approximation and very good agreement between CP and the completely different three-distorted-waves eikonal-initial-state (3DW-EIS) approximation. The situation for Au 53+ is different. At the momentum transfers at which the measurements were made, there are doubts about the convergence of the CP approximation and a factor of 2 difference between the CP and 3DW-EIS predictions. The discord between theory and experiment is even greater with the experiment giving cross sections a factor of 10 larger than the theory. A study of the convergence of the CP approximation shows that it improves rapidly with reducing momentum transfer. As a consequence, lower-order cross sections than the triple are quite well converged and present an opportunity for a more reliable test of the experiment.

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“…Furthermore, within the CDW-EIS scheme, it is possible to incorporate the interaction between the heavy nuclei, also known as N-N interaction, in a semiclassical way [26]. It has been shown that this approach is able to reproduce with reasonable agreement fully differential cross sections (FDCS) for single ionization of helium by heavy ions in a broad range of projectile velocities (see, e.g., [27][28][29][30]). …”

Section: Introductionmentioning

confidence: 99%

Interference pattern signatures in fully differential cross sections for single ionization of H₂molecules by fast protons

Ciappina¹,

Rivarola²

2007

J. Phys. B: At. Mol. Opt. Phys.

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Electron interference signatures present in fully differential cross sections for single ionization by 6 MeV protons in H 2 molecules are investigated. We employ a molecular version of the continuum-distorted wave-eikonal initial state model, where all the interactions present in the exit channel are considered on an equal footing. Calculations of fully differential cross sections are performed for different electron and projectile kinematical conditions and the range of validity of the theoretical approach is discussed. Furthermore, we explore the presence of interference patterns in differential cross sections for both aligned and randomly oriented targets in asymmetric coplanar geometries.

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Fully differential cross sections for C⁶⁺single ionization of helium: the role of nucleus–nucleus interaction

Cited by 26 publications

References 29 publications

Fully differential cross sections for Li²⁺-impact ionization of Li(2s) and Li(2p)

Fully differential cross sections for Li²⁺-impact ionization of Li(2s) and Li(2p)

Coincidence studies of He ionized byC6+,Au24+, and
McGovern
¹
,
Assafrão
²
,
Mohallem
³

et al. 2010
Phys. Rev. A

Interference pattern signatures in fully differential cross sections for single ionization of H₂molecules by fast protons

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Fully differential cross sections for C6+single ionization of helium: the role of nucleus–nucleus interaction

Cited by 26 publications

References 29 publications

Fully differential cross sections for Li2+-impact ionization of Li(2s) and Li(2p)

Fully differential cross sections for Li2+-impact ionization of Li(2s) and Li(2p)

Coincidence studies of He ionized byC6+,Au24+, andMcGovern1, Assafrão2, Mohallem3 et al. 2010Phys. Rev. A

Interference pattern signatures in fully differential cross sections for single ionization of H2molecules by fast protons

Contact Info

Product

Resources

About

Fully differential cross sections for C⁶⁺single ionization of helium: the role of nucleus–nucleus interaction

Fully differential cross sections for Li²⁺-impact ionization of Li(2s) and Li(2p)

Fully differential cross sections for Li²⁺-impact ionization of Li(2s) and Li(2p)

Coincidence studies of He ionized byC6+,Au24+, and
McGovern
¹
,
Assafrão
²
,
Mohallem
³

et al. 2010
Phys. Rev. A

Interference pattern signatures in fully differential cross sections for single ionization of H₂molecules by fast protons