Experimental study of the ionisation of atomic hydrogen by fast H<sup>+</sup>and He<sup>2+</sup>ions

Shah, M B; Gilbody, H B

doi:10.1088/0022-3700/14/14/009

Cited by 203 publications

(144 citation statements)

References 25 publications

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“…4 and on the Fano plot of Fig. 5 is in good agreement with the experimental data at high energy, especially that of Shah and Gilbody (1981), which is the most accurate for this target. At low energies, however, the data are less reliable and the uncertainties greater.…”

Section: Atomic Hydrogensupporting

confidence: 83%

“…1 1. Shah and Gilbody (1982) favor an A value of about 0.8, while the data of Hooper (1961) and of Rudd et al (1983) yield A values of about 0.6. Therefore the optical value of 0.71 was used here and the other three parameters adjusted to fit the data.…”

Section: Xenonmentioning

confidence: 91%

“…Consequently the slight adjustment of A to the theoretical value was made, and the other parameters varied to fit the data. The resulting Fite (1960); 0, Gilbody and Ireland (1963); 0, Park et al (1977); A, Shah and Gilbody (1981); 0, Park (1983).…”

Section: Atomic Hydrogenmentioning

confidence: 98%

“…The solid curve is the recommended fit; the dashed curve is the DWBA calculation. Experimental data points: V, Fite (1960); 0 , Gilbody and Ireland (1963);0, Park et al (1977); A, Shah and Gilbody (1981); 0, Park (1983). Keene (1949); 0 , Gilbody and Hasted (1957) and Gilbody and Lee (1963); A, Fedorenko et al (1960); + , Hooper (1961); 0, Solov'ev et al (1962); a, Rudd and Jorgensen (1963);@, De Heer et al (1966);x, Desesquelles et al (1966); '$+, Rudd et al (1966) and Rudd and Madison (1976); @ ( E , 2 1000 keV), Pivovar and Levchenko (1967);n (Ep 5 100 keV), Becker and Scharmann (1969); 0, Puckett and Martin (1970); e, Stolterfoht (1971a); @ (Ep < 11 keV), Latypov and Shaporenko (1973); @, Toburen, from Rudd et al (1976); B, Manson et al, from Rudd et a2.…”

Section: Heliummentioning

confidence: 99%

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Electron production in proton collisions: total cross sections

et al. 1985

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Existing data on the ionization of neutral atoms and molecules by proton impact are reviewed, and electron production cross-section data are collected. The three major experimental methods are discussed and possible sources of error identified. Some theoretical cross sections are discussed, and well-established methods of relating them to measured cross sections are reviewed. A mathematical equation is fitted to the weighted experimental data for each target, and these fits are adjusted to be consistent with appropriate theoretical calculations and with electron impact and photoionization data. Recommended values of total cross sections for proton-impact ionization are given.

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Section: Atomic Hydrogensupporting

confidence: 83%

Section: Xenonmentioning

confidence: 91%

Section: Atomic Hydrogenmentioning

confidence: 98%

Section: Heliummentioning

confidence: 99%

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Electron production in proton collisions: total cross sections

et al. 1985

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“…1, where our ionization cross section is compared to that of Shakeshaft and to the very recent experiment of Shah and Gilbody. 12 The agreement among the three results, while not perfect, is overall quite good. We note that we used only s, p, and d angular momentum states in our target-centered expansion, so from the coupled equations calculation we have only the ionization in these partial waves.…”

Section: Theoretical Methodsmentioning

confidence: 89%

Collisionally excited few-electron systems: theoretical introduction and survey. [2-200 keV]

Ford¹,

Reading²,

Becker³

1982

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We consider excitation, ionization, and charge transfer in collisions of protons (and antiprotons) with the single-electron + 2+ targets H, He , and Li . These collisions are first compared to other types of ion-atom collisions. A brief review of our own theoretical method is given; in particular we describe how we allow for both large charge transfer and ionization probabilities while retaining the computational efficiency that allows us to consider a variety of collision partners and collision energies. We comment on the comparison of our results to other theoretical work and to experiment. The qualitative features of the various Inelastic cross sections are discussed, in particular how they scale with collision energy, target nuclear charge, and the sign of the projectile charge. 1%S?^%^I NTRODUCTIONThere are many reasons why theoretical and experimental studies of atomic collisions are important. Aside from the technological applications of atomic collisions and the role they play in other branches of physics, atomic collisions provide a means for learning about collision physics itself. In this regard atomic collisions have a distinct advantage over nuclear and elementary particle collisions, in that for the atomic case the fundamental two-body (nonrelativistic) force is known. Furthermore, due to the strong forces between the electrons and atomic nuclei the independent particle model (IPM) is always a reasonable starting point and is often (particularly for inner-shell processes) an excellent approximation. For bare ion projectiles, the projectile is clearly distinguishable from the target electrons wlsose excitation, ionization, and capture are being studied. For all but very low impact velocities the bare ion projectile accurately can be assumed to be moving on a classical path. An accurate description of the electronic structures of the separated projectile and target is usually not difficult to obtain. With all this the dynamical collision

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Testing standard basis sets for direct ionizations: H⁺ + H at E_Lab = 0.1–100 keV

Kim,

Morales

2023

J Comput Chem

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With the simplest‐level electron nuclear dynamics (SLEND) method, we test standard Slater‐type‐orbital/contracted‐Gaussian‐functions (STO/CGFs) basis sets for the simulation of direct ionizations (DIs), charge transfers (CTs), and target excitations (TEs) in H+ + H at ELab = 0.1–100 keV. SLEND is a time‐dependent, variational, on‐the‐fly, and nonadiabatic method that treats nuclei and electrons with classical dynamics and a Thouless single‐determinantal state, respectively. While previous tests for CTs and TEs exist, this is the first SLEND/STO/CGFs test for challenging DIs. Spin‐orbitals with negative/positive energies are treated as bound/unbound states for bound‐to‐bound (CT and TE) and bound‐to‐unbound (DI) transitions. SLEND/STO/CGFs simulations correctly reproduce all the features of DIs, CTs and TEs over all the considered impact parameters and energies. SLEND/STO/CGFs simulations correctly predict CT integrals cross‐sections (ICSs) over all the considered energies and predict satisfactory DI and TE ICSs within some energy ranges. Strategies to improve SLEND/STO/CGFs for DI predictions are discussed.

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Experimental study of the ionisation of atomic hydrogen by fast H⁺and He²⁺ions

Cited by 203 publications

References 25 publications

Electron production in proton collisions: total cross sections

Electron production in proton collisions: total cross sections

Collisionally excited few-electron systems: theoretical introduction and survey. [2-200 keV]

Testing standard basis sets for direct ionizations: H⁺ + H at E_Lab = 0.1–100 keV

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Experimental study of the ionisation of atomic hydrogen by fast H+and He2+ions

Cited by 203 publications

References 25 publications

Electron production in proton collisions: total cross sections

Electron production in proton collisions: total cross sections

Collisionally excited few-electron systems: theoretical introduction and survey. [2-200 keV]

Testing standard basis sets for direct ionizations: H+ + H at ELab = 0.1–100 keV

Contact Info

Product

Resources

About

Experimental study of the ionisation of atomic hydrogen by fast H⁺and He²⁺ions

Testing standard basis sets for direct ionizations: H⁺ + H at E_Lab = 0.1–100 keV