Accepted Paper

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

Joshua Forer

Phys. Rev. A - Accepted 17 September, 2026

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

Abstract

The rotational excitation of the three asymmetric-top molecular ion isotopologues H2O[+], HDO[+], and D2O[+] 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. State-resolved rate coefficients for all calculated transitions N = 0 .. 4 are included as supplementary material and will be made available through the EMAA database.

If the author has provided any supplemental materials with this article they will be available upon publication of the version of record.

Physical Review A

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+

Abstract

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