Conveners
Photoionization spectroscopy II
- Richard Tuckett (University of Birmingham, UK)
In Photoelectron Photoion Coincidence Spectroscopy (PEPICO), a gas-phase molecule is ionized by a vacuum-ultraviolet photon and both the photoelectron and the photoion from a single neutral molecule are detected in coincidence. In threshold PEPICO (TPEPICO), photoions are collected in coincidence with only the near-zero kinetic energy electrons and one slice of the TPEPICO data gives the...
The absorption of light by an organic molecule, and the subsequent pathways for energy transformation and release, are fundamental processes governing life on earth. Two of the most important electronic chromophores in organic systems are C=O bonds (carbonyl molecules) and C=C bonds (alkenes and polyenes). Carbonyl molecules, such as acetaldehyde (CH$_3$CHO) also have enol tautomers...
During the past ten years, a threshold photoelectron-photoion coincidence (TPEPICO) double imaging setup has been built at the Hefei Light Source (HLS) combining with tunable vacuum ultraviolet (VUV) synchrotron radiation, and applied on the state-of-the-art dissociative photoionization dynamics. The fundamental data, such as ionization energy and appearance potential, and the dissociation...
The three unsaturated and carbon-rich pentadiynylidenes of the composition R$^1$-C$_5$-R$^2$ are highly reactive biradicals or triplet carbenes in the electronic ground state of the neutral. Nevertheless, they occur as intermediates in harsh chemical environments. Particularly in the chemistry of interstellar medium [1], planetary atmospheres [2] and in combustion processes of fuel-rich...
