Understanding the relaxation pathways of photoexcited molecules is essential to gain
atomistic-level insight into photochemistry. We performed a time-resolved study of ultrafast …

Infrared (IR) spectra of several hydrocarbon cations are reported, namely CH3+, CH4+,
CH5+, CH5+ (CH4) and C2H5+. The spectra were generated from weakly-bound helium …

We derive expansion formulas up to arbitrary order in vibrational coordinates for the
tetrahedral and octahedral vibronic Hamiltonians that involve T and E states, and t and e …

Motivated by recent measurements of the subfemtosecond structural rearrangement in the
methane cation using high-harmonic generation technology, here, we attempt an ab initio …

In this work, CH4+ cations were formed in helium droplets and investigated with infrared
laser spectroscopy. The observed infrared bands are assigned to the C2v isomer of the …

An ab initio quantum dynamics study has been performed to explore the structural
rearrangement of ground state CH 4+ in subfemtosecond resolved photodynamics. The …

An ab initio molecular orbital study has been performed to explore the structural
rearrangement and dissociation of SiH 4+ radical cation at the X ̃ 2 T 2 ground electronic …

The dissociative ionization of molecules under electron impact forms the basis for analytical
mass spectrometry of volatile compounds. It is also important in other situations, notably …

The static and dynamic aspects of the T2⊗(e+ t2) Jahn–Teller coupling effects in the 2T2
electronic state of the AlH4 radical are investigated theoretically by probing the first …

The ionization and fragmentation of methane induced by low-energy (E 0= 66 eV) electron-
impact is investigated using a reaction microscope. The momentum vectors of all three …