A simple theory of the Rydberg atoms ionisation by electromagnetic pulses and microwave field is presented. The analysis is based on the scale transformation which reduces the number of parameters and reveals the functional dependencies of the processes. It is shown that the observed ionisation of Rydberg atoms by subpicosecond electromagnetic pulses scale classically. The threshold electric fi...

Calculations are presented which use the molecular R-matrix with pseudostates (MRMPS) method to treat electron impact electron detachment and electronic excitation of the carbon dimer anion. Resonances are found above the ionisation threshold of C−2 with 1Σ+g , Πg and Πg symmetry. These are shape resonances trapped by the effect of an attractive polarisation potential competing with a repulsive...

In this work we study the behaviour of the shallow Zn acceptor in GaxIn1−xAs Quantum Wells (1.5 nm < Lz < 5 nm) lattice matched to InP. The experimental results as obtained by photoluminescence and optically detected impact ionisation to determine the binding energy of Zn are compared with a theoretical calculation. The binding energy increases from the 3D bulk value for smaller Lz, passes thro...