Electron-electron coincidence experiments have experienced over the past twenty years an increasingly rapid expansion and application to many different fields. Among them, the (e,2e) spectroscopy has been successfully used to investigate either the target electronic structure or the ionisation dynamics. The capability of this spectroscopy to investigate single particle properties in atoms, mole...

Two vertical cosmic ray telescopes for atmospheric cosmic ray ionisation event detection are compared. Counter A, designed for low power remote use, was deployed in the Welsh mountains; its event rate increased with altitude as expected from atmospheric cosmic ray absorption. Independently, Counter B’s event rate was found to vary with incoming particle acceptance angle. Simultaneous co-located...

The photoionisation spectrum of atomic phosphorus prepared by successive abstraction reactions involving H atoms and PH,, is presented from its ionisation threshold to 765 A. Prominent autoionisation structure is observed between the fine-structure limits 3P2-3P, near the ionisation threshold. In addition, a window resonance series is seen, involving inner s-shell excitation to. .. ('S)np 4P st...

A three dimensional Smoothed Particle Hydrodynamical (SPH) model has been extended to study the radiative driven implosion effect of massive stars on the dynamical evolutions of surrounding molecular clouds. The new elements in the upgraded code are the inclusion of Lyman continuum in the incident radiation flux and the treatment of hydrogen ionisation process; introducing ionisation heating & ...

Genotoxic carcinogens interact with nucleic acids and proteins to yield covalently bound products (adducts), the quantitative determination of which has been proposed as a biomonitor of human exposure to carcinogens. Mass spectrometry is playing a leading role both in the structural characterisation and in the quantitative determination of these carcinogen adducts. In particular electrospray io...

Electron impact cross sections sets are constructed for the nitrogen trifluoride, nitrogen difluoride and nitrogen monofluoride molecules. These cross sections are based on ab initio R-matrix calculations augmented by other procedures. Cross sections are presented for elastic collisions, momentum transfer, dissociative electron attachment, electron impact dissociation, ionisation and dissociati...

Here we report the first operation of a new apparatus of time of flight mass spectrometry using the tunable Vacuum-UV radiation emitted by a laser produced plasma as ionising source. Toluene cluster mass spectra acquired at different ionising wavelength are presented. Due to massive fragmentation the mass spectra change significantly by increasing the photon energy above the toluene ionisation ...

Double ionisation of He by 3.6 MeV/u Au impact is investigated in a kinematically complete experiment using an integrated multi-electron recoil-ion momentum spectrometer (reaction microscope). Surprisingly, the final-state correlation between the recoiling He target ion momentum and the momenta of both emitted electrons is found to be the strongest among the various two-body correlations. On th...

We examine the temperature structure of the IGM due to the passage of individual ionisation fronts using a radiative transfer (RT) code coupled to a particle-mesh (PM) N -body code. Multiple simulations were performed with different spectra of ionising radiation: a power law (∝ ν), miniquasar, starburst, and a time-varying spectrum that evolves from a starburst spectrum to a power law. The RT i...