A model for energy, pressure and flow velocity distributions at the beginning of ultra-relativistic heavy ion collisions is presented, which can be used as an initial condition for hydrodynamic calculations. Our model takes into account baryon recoil for both target and projectile, arising from the acceleration of partons in an effective field, F µν , produced in the collision. The typical fiel...

Deuterium labelling is used to show that the disproportionation of thioxanthylium salts involve transfer of a hydride, (deuteride) ion from the9-positionof one molecule of the compound, as its hydro], to the 9 - position of another molecule in the cation form

Cold inelastic collisions between confined cesium (Cs) atoms and Cs2 molecules are investigated inside a CO2 laser dipole trap. Inelastic atom-molecule collisions can be observed and measured with a rate coefficient of approximately 2.6 x 10(-11) cm3 s(-1), mainly independent of the molecular rovibrational state populated. Lifetimes of purely atomic and molecular samples are essentially limited...

We estimate the CIMS sensitivity for the hydroxyhydroperoxides (ISOPOOH) and hydroperoxyaldehydes (HPALD) from the ion-molecule collision rate, calculated using the parameterization of Su and Chesnavich [1]. This requires knowledge of the average dipole moment and polarizibility of the neutral species. We obtain these parameters for the species of interest from ab initio calulations. For accura...

Cold inelastic collisions between confined cesium (Cs) atoms and Cs2 molecules are investigated inside a CO2 laser dipole trap. Inelastic atom-molecule collisions can be observed and measured with a rate coefficient of ∼ 2.5× 10 cm s, mainly independent of the molecular ro-vibrational state populated. Lifetimes of purely atomic and molecular samples are essentially limited by rest gas collision...

The electrical mobilities of hundreds of mass-selected, multiply charged nanodrops (2-6 nm in diameter) of the ionic liquid EMI-BF4 have been measured in air and CO2 at temperatures, T, ranging from 20 to 100 °C, extending previous studies, based on EMI-N(CN)2 nanodrops in air at 20 °C, to other temperatures and drift gases. The known compressibility of EMI-BF4 removes prior slight ambiguities ...

The control of ultracold collisions between neutral atoms is an extensive and successful field of study. The tools developed in this field allow for ultracold chemical reactions to be managed using magnetic fields1, light fields2 and spin-state manipulation of the colliding particles3 among other methods. Control of chemical reactions in ultracold atom-ion collisions is a young and growing fiel...

A combined experimental and theoretical study is conducted on a series of model compounds in order to assess the combined role of branching and charge symmetry on absorption, photoluminescence, and two-photon absorption (TPA) properties. The main issue of this study is to examine how branching of quadrupolar chomophores can lead to different consequences as compared to branching of dipolar chro...

We consider ultracold collisions of polar molecules confined in a one-dimensional optical lattice. Using a quantum scattering formalism and a frame transformation method, we calculate elastic and chemical quenching rate constants for fermionic molecules. Taking 40K87Rb molecules as a prototype, we find that the rate of quenching collisions is enhanced at zero electric field as the confinement i...

Abstract Recently, a new method has been introduced to study ion-molecule reactions at very low collision energies, down below k B ? 1 K (Allmendinger et al 2016 ChemPhysChem 17 3596). To eliminate the acceleration of ions by stray electric fields in reaction volume, are observed within orbit Rydberg electron with large principal quantum number n > 20. This is assumed not influence taking pl...