Rotational excitation of asymmetric-top molecular ions by electron impact: Application to <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msup><mrow><mi mathvariant="normal">O</mi></mrow><mo>+</mo></msup></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mrow><mi>HDO</mi></mrow><mo>+</mo></msup></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi mathvariant="normal">D</mi><mn>2</mn></msub><msup><mrow><mi mathvariant="normal">O</mi></mrow><mo>+</mo></msup></mrow></math>

Joshua Forer

doi:10.1103/y635-7q8f

Rotational excitation of asymmetric-top molecular ions by electron impact: Application to $H_{2} O^{+}$ , ${HDO}^{+}$ , and $D_{2} O^{+}$

Joshua Forer

Columbia Astrophysics Laboratory, Columbia University, New York, New York 10027, USA

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Phys. Rev. A 114, 042820 – Published 27 October, 2026

DOI: https://doi.org/10.1103/y635-7q8f

Abstract

The rotational excitation of the three asymmetric-top molecular ion isotopologues $H_{2} O^{+}$ , ${HDO}^{+}$ , and $D_{2} O^{+}$ is studied theoretically using a combined framework of electron-molecule R matrix scattering theory, multichannel quantum-defect theory, frame transformation theory, and the Coulomb-Born approximation. The latter two have been adapted here for asymmetric-top rotors. State-resolved cross sections and kinetic rate coefficients for transitions from the rotational ground state of the ions are presented.

Physical Review A

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Rotational excitation of asymmetric-top molecular ions by electron impact: Application to $H_{2} O^{+}$ , ${HDO}^{+}$ , and $D_{2} O^{+}$

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Rotational excitation of asymmetric-top molecular ions by electron impact: Application to H2O+, HDO+, and D2O+

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Rotational excitation of asymmetric-top molecular ions by electron impact: Application to $H_{2} O^{+}$ , ${HDO}^{+}$ , and $D_{2} O^{+}$