Study of He*/Ne*+Ar, Kr, N2, H2, D2 Chemi-Ionization Reactions by Electron Velocity-Map Imaging

Tanteri, Silvia; Gordon, Sean D. S.; Zou, Junwen; Osterwalder, Andreas

doi:10.1021/acs.jpca.1c07232

Cited by 2 publications

(2 citation statements)

References 83 publications

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“…Therefore, the initial vibrational state ( v ) of the molecular ion is encoded in the electron kinetic energy. The energy distribution of electrons represents the vibrational spectrum of the molecular ion with near Franck-Condon probabilities ( 25 , 26 ). In Fig.…”

Section: The Methodsmentioning

confidence: 99%

Tomography of Feshbach resonance states

Margulis

Horn

Reich

et al. 2023

Science

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Feshbach resonances are fundamental to interparticle interactions and become particularly important in cold collisions with atoms, ions, and molecules. In this work, we present the detection of Feshbach resonances in a benchmark system for strongly interacting and highly anisotropic collisions: molecular hydrogen ions colliding with noble gas atoms. The collisions are launched by cold Penning ionization, which exclusively populates Feshbach resonances that span both short- and long-range parts of the interaction potential. We resolved all final molecular channels in a tomographic manner using ion-electron coincidence detection. We demonstrate the nonstatistical nature of the final-state distribution. By performing quantum scattering calculations on ab initio potential energy surfaces, we show that the isolation of the Feshbach resonance pathways reveals their distinctive fingerprints in the collision outcome.

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Section: The Methodsmentioning

confidence: 99%

Tomography of Feshbach resonance states

Margulis

Horn

Reich

et al. 2023

Science

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“…Tanteri et al developed a related methodology to studying chemi-ionization reactions in a merged beam experiment. By determining the distribution of electron kinetic energies using velocity-map imaging they were able to estimate a branching ratio between associative ionization and Penning ionization (A * + B forming AB + + e − or A + B + + e − , respectively) [126].…”

Section: (I) Cold Chemistry (T > 1 Mk)mentioning

confidence: 99%

Cold and ultracold molecules in the twenties

Softley

2023

Proc. R. Soc. A.

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A diversity of experimental techniques has been developed over the last 25 years to create samples of molecular gases at temperatures close to the Absolute Zero—here we consider samples in the range from 10s of Kelvin (cold) down to 10s of nanoKelvin (ultracold). In these exotic physical environments, a range of novel experiments can be conducted which bring high levels of control over the properties of these ‘almost stationary’ molecules, in some cases with control over single trapped molecules achievable. In this article, recent advances in this field since 2020, both in terms of the ability to produce and manipulate the molecules and understand their properties, and also in the development of new applications of these technologies, are highlighted. Applications include observing explicit ‘quantum effects’ in chemical reactivity, developing an understanding of chemistry in cold astrophysical media, the creation of exotic phases of matter, the use of trapped molecules in quantum computation and simulations systems, and the use of very high-precision spectroscopic measurements to answer fundamental physics questions beyond the standard model of particle physics.

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Study of He/Ne+Ar, Kr, N₂, H₂, D₂ Chemi-Ionization Reactions by Electron Velocity-Map Imaging

Cited by 2 publications

References 83 publications

Tomography of Feshbach resonance states

Tomography of Feshbach resonance states

Cold and ultracold molecules in the twenties

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