Spin-exchange cross section for electron excitation of Na3S−3Pdetermined by a novel spectroscopic technique

Absolute cross section for Si„3s S ̃3s3p P... electron-impact excitation

We have measured the absolute cross section for electron-impact excitation ~EIE! of Si(3s S ̃3s3p P) from energies below threshold to 11 eV above. A beams modulation technique with inclined electron and ion beams was used. Radiation at 120.7 nm from the excited ions was detected using an absolutely calibrated optical system. The fractional population of the Si(3s3p P) metastable state in the inc...

Studies into Electron Spin Exchange

Electron cross section set for CHF 3

Total, elastic, and inelastic cross sections for positron and electron collisions with tetrahydrofuran We describe the development of a consistent set of low-energy electron collision cross sections for trifluoromethane, CHF 3. First-principles calculations are used to obtain key elastic and inelastic cross sections. These are combined with literature values of the ionization cross section and ...

A dissociative electron attachment cross-section estimator

Dissociative electron attachment (DEA) is the major process where molecules are destroyed in low-energy plasmas. DEA cross sections are therefore important for a whole variety of applications but are both hard to measure or compute accurately. A method for estimating DEA cross sections based a simple resonance plus survival model is presented. Test results are presented for DEA of molecular oxy...

Raman cross section of spin ladders

We demonstrate that a two-triplet resonance strongly renormalizes the Raman spectrum of two-leg spin-ladders and moreover suggest this to be the origin of the asymmetry of the magnetic Raman continuum observed in CaV2O5. PACS. 78.30.-j Infrared and Raman spectra – 75.10.Jm Quantized spin models – 75.50.Ee Antiferromagnetics Magnetic Raman scattering is a powerful tool to investigate the total s...