Collisional ionization and excitation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>: Dependence on the orientation of the internuclear axis

Edwards, A. K.; Wood, R. M.; Ma, Mangan; Ezell, R.L.

doi:10.1103/physreva.46.6970

Cited by 25 publications

(14 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A strong alignment effect as predicted by theory was later confirmed experimentally in O 81 transfer ionization collisions with D 2 [6,7]. However, in this experiment as well as in proton collisions with H 2 [8,9] no alignment dependence was revealed in double ionization and ionization-excitation. This result was supported by calculations in the first Born approximation (cited in [10]) which showed that pure ionization of H 2 by proton impact shows relatively little (typically 20%) alignment dependence.…”

supporting

confidence: 64%

Orientation Effects in Multiple Ionization of Molecules by Fast Ions

et al. 1997

View full text Add to dashboard Cite

The multiple ionization and dissociation of N 2 molecules by fast He 1 ions was studied by the coincident measurement of correlated fragment-ion momenta using a position-and time-sensitive multiparticle detector. The dependence of the cross section on the alignment of the molecular axis with respect to the beam axis was determined. The results show that for higher degrees of ionization the cross section has a pronounced minimum for molecules oriented perpendicular to the beam. The quantitative interpretation of the observed results is based on an extended version of the statistical energy deposition model. [S0031-9007(97)03955-0]

show abstract

supporting

confidence: 64%

Orientation Effects in Multiple Ionization of Molecules by Fast Ions

et al. 1997

View full text Add to dashboard Cite

show abstract

“…Unlike fragmentation of more complex molecules, where the photoejection of an electron is usually followed by molecular rearrangement which eventually leads to fragmentation, double photoionization of D 2 leaves two bare ions in a mutually repulsive Coulomb potential. Thus detection of the momentum vectors of the two outgoing nuclei provides a direct image of the spatial alignment of the two nuclear centers at the instant of double ionization [4,5].…”

mentioning

confidence: 99%

Double Photoionization of Spatially AlignedD2

et al. 1998

View full text Add to dashboard Cite

The four-body breakup of spatially aligned D 2 by 58.8 eV photons from the Advanced Light Source has been investigated by measuring the three dimensional momentum vectors of both fragment ions and one of the two electrons in coincidence. Energy and angular correlation between ions and electrons is discussed. We find rotational symmetry of the electron angular distribution around the polarization vector of the light and significant differences between helium and D 2 as well as between molecular alignment parallel and perpendicular to the polarization axis. [S0031-9007(98)

show abstract

“…3. 12,11,14 Such observations may be useful in testing the limits of applicability of our approximations.…”

Section: The Geometrical Structure Factormentioning

confidence: 96%

“…9 However, understanding and analysis of interactions of molecules and clusters often involves transitions of more than one electron. A more specific example of a case in which multiple electron transitions may be significant is Coulomb explosions [10][11][12][13][14][15] in which a molecule or cluster is quickly stripped of some of its electrons and breaks into mutually repulsive fragments. So processes involving multielectron transitions are clearly of interest.…”

Section: Independent Center Independent Electron Approximation For Dmentioning

confidence: 99%

Independent center, independent electron approximation for dynamics of molecules and clusters

McGuire

Straton

Wang

et al. 1996

The Journal of Chemical Physics

View full text Add to dashboard Cite

A formalism is developed for evaluating probabilities and cross sections for multiple-electron transitions in scattering of molecules and clusters by charged collision partners. First, the molecule is divided into subclusters each made up of identical centers (atoms). Within each subcluster coherent scattering from identical centers may lead to observable phase terms and a geometrical structure factor. Then, using a mean field approximation to describe the interactions between centers we obtain AI∼∑k∏keiδkIAIk. Second, the independent electron approximation for each center may be obtained by neglecting the correlation between electrons in each center. The probability amplitude for each center is then a product of single electron transition probability amplitudes, aIki, i.e. AIk≊∏iaiki. Finally, the independent subcluster approximation is introduced by neglecting the interactions between different subclusters in the molecule or cluster. The total probability amplitude then reduces to a simple product of amplitudes for each subcluster, A≊∏IAI. Limitations of this simple approximation are discussed.

show abstract

Collisional ionization and excitation ofH2: Dependence on the orientation of the internuclear axis

Cited by 25 publications

References 31 publications

Orientation Effects in Multiple Ionization of Molecules by Fast Ions

Orientation Effects in Multiple Ionization of Molecules by Fast Ions

Double Photoionization of Spatially AlignedD2

Independent center, independent electron approximation for dynamics of molecules and clusters

Contact Info

Product

Resources

About