Joshua Forer

Rotational excitation of asymmetric-top molecular ions by electron impact: application to H$_2$O$^+$, HDO$^+$, and D$_2$O$^+$

Joshua Forer

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 …

Rotational excitation of asymmetric-top molecular ions by electron impact: application to H$_2$O$^+$, HDO$^+$, and D$_2$O$^+$

Joshua Forer

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 …

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Kinetic Temperature Rate Coefficients for Dissociative Recombination of CH +

Joshua Ryan Lohmolder, Joshua Forer, Daniel Wolf Savin

Abstract The rate coefficient for dissociative recombination (DR) of CH + is needed to model clouds in the interstellar medium (ISM). Theoretical data for DR are typically obtained in the form of cross sections as a function of collision energy. However, astrochemical …

Dissociative Electron Attachment to the HNC 3 Molecule

Elizabeth Aubin, Jean-Christophe Loison, Mehdi Adrien Ayouz, Joshua Forer et autres

Dissociative electron attachment (DEA) to HNC_{3} is modeled theoretically using a first-principles approach. In HNC_{3}+e^{-} collisions, there is a low-energy resonance, which has a repulsive character along the H+NC_{3} coordinate and becomes a bound electronic state of the HNC_{3}^{-} anion near the …

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Dissociative electron attachment to the HNC$_3$ molecule

Elizabeth Aubin, Jean‐Christophe Loison, Mehdi Adrien Ayouz, Joshua Forer et autres

Dissociative electron attachment (DEA) to the HNC$_3$ is modeled theoretically using a first-principles approach. In HNC$_3$+$e^-$ collisions, there is a low-energy resonance, which has a repulsive character along the H+NC$_3$ coordinate and becomes a bound electronic state of the HNC$_3^-$ anion near …

Low-energy dissociative recombination of OH+

Joshua Forer, Dávid Hvizdoš, Chris H. Greene, Viatcheslav Kokoouline

Dissociative recombination of the OH+ ion with free electrons is modeled theoretically using a recently developed approach that is based on first-principles calculations and multichannel quantum defect theory. The coupling between the incident electron and the rovibrational motion of the ion is …

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Photoionization of the CH molecule

Conner Penson, Joshua Forer, Mehdi Adrien Ayouz, Nicolas Douguet et autres

The photoionization (PI) spectrum of the CH molecule is evaluated theoretically and compared with available experimental data for photon energies from the photoionization threshold up to 12 eV. The vibrational motion and the vibronic coupling between the lowest vibrational and electronic states …

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Dissociative recombination of CF +

Joshua Forer, Jeoffrey Boffelli, Mehdi Adrien Ayouz, Dávid Hvizdoš et autres

One of the most important processes in the fluorine chemical network within plasmas is dissociative recombination of the CF${}^{+}$ molecular ion with free electrons. This study interprets accurate experimental measurements and presents a fully quantum model of the process, with one of …

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Dissociative Recombination of CF$^+$

Joshua Forer, Jeoffrey Boffelli, Mehdi Adrien Ayouz, Dávid Hvizdoš et autres

This work presents our theoretical study of the dissociative recombination (DR) of the closed-shell diatomic system CF$^+$ based on an approach recently applied to the CH$^+$ molecule. Our extended treatment uses the UK R-matrix theory and the multichannel quantum-defect theory procedure to …

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Bound and autoionizing potential energy curves in the CH molecule

Dávid Hvizdoš, Joshua Forer, Viatcheslav Kokoouline, Chris H. Greene

This article presents a method of computing bound state potential curves and autoionizing curves using fixed-nuclei R-matrix data extracted from the Quantemol-N software suite. It is a method based on two related multichannel quantum-defect theory approaches. One is applying bound-state boundary conditions …

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Kinetic rate coefficients for electron-driven collisions with CH+: dissociative recombination and rovibronic excitation

Joshua Forer, Dávid Hvizdoš, Mehdi Adrien Ayouz, Chris H. Greene et autres

ABSTRACT Cross-sections and rate coefficients for rovibronic excitation of the CH+ ion by electron impact and dissociative recombination of CH+ with electrons are evaluated using a theoretical approach combining an R-matrix method and molecular quantum defect theory. The method has been developed …

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Temperature sensitivity and temperature response across development in the Drosophila larva

Anastasiia Evans, Anggie J Ferrer, Joseph W. Shomar, Joshua Forer et autres

larvae and also the physical and sensory effects of temperature variation on locomotion and navigation. In particular we characterize how sensory neuronal and behavioral responses to temperature variation both change across the development of the larva. Looking at a wide range of …

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