Dynamics of the reaction H2+(He; H)HeH+. Comparison of beam experiments with quasi-classical trajectory studies

Schneider, F.; Havemann, U.; Zülicke, Lutz; Pacak, V.; Birkinshaw, K.; Herman, Z.

doi:10.1016/0009-2614(76)80225-4

Cited by 49 publications

(9 citation statements)

References 22 publications

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“…These differences could arise due to several reasons: (i) The experimental results are not fully (v, j, E trans ) resolved. Havemann et al 15 showed that there could be charge transfer between H and HeH + formed through a spectator stripping mechanism, 4,18,42,43 from higher v states resulting in dissociation at large internuclear distances; this implies non-adiabatic transitions; our studies are confined to the ground electronic state. (iii) The present study uses the centrifugal sudden approximation.…”

Section: Resultsmentioning

confidence: 79%

Collision-induced dissociation in (He, ${\rm H}_{2}^+$H2+(v = 0–2; j = 0–3)) system: A time-dependent quantum mechanical investigation

Kolakkandy

Giri

Sathyamurthy

2012

The Journal of Chemical Physics

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The collision-induced process He + H(2)(+)(v = 0-2; j = 0-3) → He + H + H(+) has been investigated using a time-dependent quantum mechanical wave packet approach, within the centrifugal sudden approximation. The exchange reaction He + H(2)(+) → HeH(+) + H, which has a lower threshold, dominates over the dissociation process over the entire energy range considered in this study. The reaction cross section for both the exchange and dissociation channels and the branching ratio between the two channels have been computed on the McLaughlin-Thompson-Joseph-Sathyamurthy potential-energy surface and compared with the available experimental and quasiclassical trajectory results.

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Section: Resultsmentioning

confidence: 79%

Collision-induced dissociation in (He, ${\rm H}_{2}^+$H2+(v = 0–2; j = 0–3)) system: A time-dependent quantum mechanical investigation

Kolakkandy

Giri

Sathyamurthy

2012

The Journal of Chemical Physics

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“…The expected vibrational and rotational population distributions for the resultant HeH + have been calculated by Schneider etal., 14 and exhibit significant population differences among lowlying vibration-rotational states. The source is capable of producing an HeH + beam of typically 3 to 8 nA current.…”

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confidence: 99%

Observation of the Infrared Spectrum of the Helium-Hydride Molecular IonHe4H
Tolliver
¹
,
Kyrala
²
,
Wing
³

1979
Phys. Rev. Lett.
71
2
14
0
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We have made the first observation of the vibrational-rotational spectrum of the electronic ground state of the helium-hydride molecular ion 4 HeH + . The Doppler-tuned ion-beam laser-spectroscopic technique was used. The frequencies of five transitions between 1700 and 1900 cm" 1 have been measured to ± 0.002 cm" 1 (± 1 ppm). The experimental values deviate from current theory by typically 0.2 cm" i f and are two orders of magnitude more precise than the theoretical values.

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“…angle e, and product c.m. recoil energy Er are related to the Cartesian flux distribution by63 (3) (4)…”

Section: Resultsmentioning

confidence: 99%

State-selected reactive scattering. II. He+H+2→HeH++H

Pollard

Johnson

Cohen

1991

The Journal of Chemical Physics

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Articles you may be interested inEffect of state-selective reactive decay on the evolution of quantum systemsThe endoergic reaction He + Ht --+ HeH + + H is investigated in a molecular-beam experiment as a function ofH 2 + vibrational energy at c.m. collision energies between 0.3 and 1.9 eV. Reactant ions generated by resonantly enhanced four-photon ionization are impulsively accelerated to collide with a beam of He. Time-of-flight velocity distributions of HeH + , measured at one laboratory angle, yield the differential cross section at c.m. angles () = a· and 180·. A shift from "He rebound" to "H + stripping" behavior accompanies the enhancement in the cross section as the H 2 + vibrational energy increases, which matches previous studies at higher collision energy. Small-impact-parameter events produce HeH + with less recoil velocity (more internal energy) than those at large impact parameters. Within the limits of sensitivity and resolution U~E::::: 0.15 e V), definitive resonance features in the collision energy dependence of du/d(J) are not evident. Improvements in the technique to enable such observations are suggested.

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Dynamics of the reaction H2+(He; H)HeH+. Comparison of beam experiments with quasi-classical trajectory studies

Cited by 49 publications

References 22 publications

Collision-induced dissociation in (He, ${\rm H}_{2}^+$H2+(v = 0–2; j = 0–3)) system: A time-dependent quantum mechanical investigation

Collision-induced dissociation in (He, ${\rm H}_{2}^+$H2+(v = 0–2; j = 0–3)) system: A time-dependent quantum mechanical investigation

Observation of the Infrared Spectrum of the Helium-Hydride Molecular IonHe4H
Tolliver
¹
,
Kyrala
²
,
Wing
³

1979
Phys. Rev. Lett.
71
2
14
0
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State-selected reactive scattering. II. He+H+2→HeH++H

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Dynamics of the reaction H2+(He; H)HeH+. Comparison of beam experiments with quasi-classical trajectory studies

Cited by 49 publications

References 22 publications

Collision-induced dissociation in (He, ${\rm H}_{2}^+$H2+(v = 0–2; j = 0–3)) system: A time-dependent quantum mechanical investigation

Collision-induced dissociation in (He, ${\rm H}_{2}^+$H2+(v = 0–2; j = 0–3)) system: A time-dependent quantum mechanical investigation

Observation of the Infrared Spectrum of the Helium-Hydride Molecular IonHe4HTolliver1, Kyrala2, Wing3 1979Phys. Rev. Lett.712140View full textAdd to dashboardCite

State-selected reactive scattering. II. He+H+2→HeH++H

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Resources

About

Observation of the Infrared Spectrum of the Helium-Hydride Molecular IonHe4H
Tolliver
¹
,
Kyrala
²
,
Wing
³

1979
Phys. Rev. Lett.
71
2
14
0
View full text Add to dashboard Cite