Discoveries of mass independent isotope effects in the solar system: Past, present and future

MH Thiemens, M Lin - Reviews in Mineralogy and …, 2021 - pubs.geoscienceworld.org
The history of the discovery of stable isotopes and later, their influence of chemical and
physical phenomena originates in the 19th century with discovery of radioactivity by …

40 years of theoretical advances in mass-independent oxygen isotope effects and applications in atmospheric chemistry: A critical review and perspectives

M Lin, MH Thiemens - Applied Geochemistry, 2023 - Elsevier
The discovery of chemically induced mass-independent isotope fractionation in ozone
formation 40 years ago revealed a new type of isotope effect that was not considered within …

Ultrafast geometrical reorganization of a methane cation upon sudden ionization: an isotope effect on electronic non-equilibrium quantum dynamics

CEM Gonçalves, RD Levine, F Remacle - … Chemistry Chemical Physics, 2021 - pubs.rsc.org
The ultrafast structural, Jahn–Teller (JT) driven, electronic coherence mediated quantum
dynamics in the CH4+ and CD4+ cations that follows sudden ionization using an XUV …

Photodissociation via weak intersystem crossing: Incoherent versus coherent excited-state nonadiabatic dynamics in

N Gelfand, K Komarova, F Remacle, RD Levine - Physical Review A, 2023 - APS
Vacuum ultraviolet (UV) light at a well-defined wavelength excites N 2 to different vibronic
levels of the singlet electronic states that strongly interact through nonadiabatic coupling …

Strong isotope-dependent photodissociation branching ratios of N2 and their potential implications for the 14N/15N isotope fractionation in Titan's atmosphere

M Liu, P Jiang, L Lu, T Yin, L Ma, M Cheng… - The Astrophysical …, 2021 - iopscience.iop.org
The origin and evolution of the 14 N/15 N ratio of Titan's atmosphere has long been a
subject of debate. Clearly a better understanding of the N isotopic fractionation mechanism …

Use of isotope effects to understand the present and past of the atmosphere and climate and track the origin of life

MH Thiemens, M Lin - Angewandte Chemie, 2019 - Wiley Online Library
Stable isotope ratio measurements have been used as a measure of a wide variety of
processes, including solar system evolution, geological formational temperatures, tracking of …

Strong and selective isotope effect in the vacuum ultraviolet photodissociation branching ratios of carbon monoxide

P Jiang, X Chi, Q Zhu, M Cheng, H Gao - Nature Communications, 2019 - nature.com
Abstract Rare isotope (13C, 17O and 18O) substitutions can substantially change absorption
line positions, oscillator strengths and photodissociation rates of carbon monoxide (CO) in …

Electronic coherences steer the strong isotope effect in the ultrafast Jahn–Teller structural rearrangement of methane cation upon tunnel ionization

M Blavier, K Komarova, CEM Gonçalves… - The Journal of …, 2021 - ACS Publications
We report on fully quantum electronic-nuclear dynamics following sudden ionization from
the neutral in the three lowest electronic states of the CH4+ and CD4+ cations. There is a …

Effects of Autoionizing Resonances on Wave-Packet Dynamics Studied by Time-Resolved Photoelectron Spectroscopy

P Zhang, VH Hoang, C Wang, TT Luu, V Svoboda… - Physical Review Letters, 2023 - APS
We report a combined experimental and theoretical study on the effect of autoionizing
resonances in time-resolved photoelectron spectroscopy. The coherent excitation of N 2 …

Few-femtosecond isotope effect in polyatomic molecules ionized by extreme ultraviolet attosecond pulse trains

M Vacher, A Boyer, V Loriot, F Lépine… - The Journal of Physical …, 2022 - ACS Publications
Following ionization by an extreme ultraviolet (XUV) attosecond pulse train, a polyatomic
molecule can be promoted to more-than-one excited states of the residual ion. The ensuing …