Contribution of different channels to the doubly differential cross sections for ejection of electrons in ³He²⁺–H₂ collisions

<p><strong>Figure 5.</strong> Contribution of different channels to the doubly differential cross sections for ejection of electrons in ³He²⁺–H₂ collisions. The cross sections for DI, QA and their sum (total) are shown.</p> <p><strong>Abstract</strong></p> <p>Energy spectra of electrons ejected into ³He²⁺–H₂ collisions have been measured in the incident ion energy range 6–30 keV. Parameters of the quasimolecule formed during the collision are determined. The dominant role of the channel (2a')² → 1a'3a' → 1a' + <em>e</em> in the production of electrons at keV ion energies has been revealed. The structure associated with autoionization transitions in the projectile helium atoms shows enormously large broadening and shift to lower energies.</p

Energy spectra of electrons ejected in He²⁺–H₂ collisions

<p><strong>Figure 1.</strong> Energy spectra of electrons ejected in He²⁺–H₂ collisions.</p> <p><strong>Abstract</strong></p> <p>Energy spectra of electrons ejected into ³He²⁺–H₂ collisions have been measured in the incident ion energy range 6–30 keV. Parameters of the quasimolecule formed during the collision are determined. The dominant role of the channel (2a')² → 1a'3a' → 1a' + <em>e</em> in the production of electrons at keV ion energies has been revealed. The structure associated with autoionization transitions in the projectile helium atoms shows enormously large broadening and shift to lower energies.</p

Terms of the quasimolecule HeH₂²⁺ at <em>r</em> = 1.4 au

<p><strong>Figure 4.</strong> Terms of the quasimolecule HeH₂²⁺ at <em>r</em> = 1.4 au. Points, the diabatic term determined from experimental data.</p> <p><strong>Abstract</strong></p> <p>Energy spectra of electrons ejected into ³He²⁺–H₂ collisions have been measured in the incident ion energy range 6–30 keV. Parameters of the quasimolecule formed during the collision are determined. The dominant role of the channel (2a')² → 1a'3a' → 1a' + <em>e</em> in the production of electrons at keV ion energies has been revealed. The structure associated with autoionization transitions in the projectile helium atoms shows enormously large broadening and shift to lower energies.</p

Width of process (3): 2pσ²–1sσ in He²⁺–He and (2a')²–1a' in He²⁺–H₂

<p><strong>Figure 3.</strong> Width of process (<a href="http://iopscience.iop.org/0953-4075/46/17/175203/article#b476744eqn04" target="_blank">3</a>): 2pσ²–1sσ in He²⁺–He and (2a')²–1a' in He²⁺–H₂.</p> <p><strong>Abstract</strong></p> <p>Energy spectra of electrons ejected into ³He²⁺–H₂ collisions have been measured in the incident ion energy range 6–30 keV. Parameters of the quasimolecule formed during the collision are determined. The dominant role of the channel (2a')² → 1a'3a' → 1a' + <em>e</em> in the production of electrons at keV ion energies has been revealed. The structure associated with autoionization transitions in the projectile helium atoms shows enormously large broadening and shift to lower energies.</p

The function <em>F</em>(<em>R</em>)

<p><b>Table 1.</b> The function <em>F</em>(<em>R</em>).</p> <p><strong>Abstract</strong></p> <p>Energy spectra of electrons ejected into ³He²⁺–H₂ collisions have been measured in the incident ion energy range 6–30 keV. Parameters of the quasimolecule formed during the collision are determined. The dominant role of the channel (2a')² → 1a'3a' → 1a' + <em>e</em> in the production of electrons at keV ion energies has been revealed. The structure associated with autoionization transitions in the projectile helium atoms shows enormously large broadening and shift to lower energies.</p

Structure associated with autoionization transitions in the He atom

<p><strong>Figure 6.</strong> Structure associated with autoionization transitions in the He atom. Arrows indicate positions of lines at the ion scattering angle θ<em>_i</em> = 0° relevant to decay of the states 2s^{2 1}S(1), 2p^{2 1}D(2), 2s2p ¹P(3) and 2p^{2 1}S. The broken line is the spectral line for the state 2s^{2 1}S, calculated at θ<em>_i</em> = 2° and normalized at the peak maximum. Ion energy is 12 keV.</p> <p><strong>Abstract</strong></p> <p>Energy spectra of electrons ejected into ³He²⁺–H₂ collisions have been measured in the incident ion energy range 6–30 keV. Parameters of the quasimolecule formed during the collision are determined. The dominant role of the channel (2a')² → 1a'3a' → 1a' + <em>e</em> in the production of electrons at keV ion energies has been revealed. The structure associated with autoionization transitions in the projectile helium atoms shows enormously large broadening and shift to lower energies.</p