Identification and quantification of a ⁶⁰Co radiation source under an intense ¹³⁷Cs radiation field using an application-specific CeBr₃ spectrometer suited for use in intense radiation fields

Coherent Cherenkov radiation as an intense THz source

Diffraction and Cherenkov radiation of relativistic electrons from a dielectric target has been proposed as mechanism for production of intense terahertz (THz) radiation. The use of an extremely short high-energy electron beam of a 4th generation light source (X-ray free electron laser) appears to be very promising. A moderate power from the electron beam can be extracted and converted into THz...

The Intense Radiation Gas

– We present a new dispersion relation for photons that are nonlinearly interacting with a radiation gas of arbitrary intensity due to photon–photon scattering. It is found that the photon phase velocity decreases with increasing radiation intensity, it and attains a minimum value in the limit of super-intense fields. By using Hamilton's ray equations, a self-consistent kinetic theory for inter...

Energy shifts for a multilevel atom in an intense squeezed radiation field

We derive atomic energy-level shifts due to the presence of an electric field associated with an arbitrary quantummechanical state describing an intense, but otherwise arbitrary, radiation field, a particular example of such a state being squeezed radiation from an intense source. In another particular case, in which the radiation is classical and monochromatic, our result reduces to the well-k...

Nonthermal Transition of GaAs in Ultra-Intense Laser Radiation Field

Using the technique of tight-binding electron-ion dynamics, we have calculated the response of crystalline GaAs when a femtosecond laser pulse excites 1− 20% of the valence electrons. Above a threshold fluence, which corresponds to promotion of about 12% of the valence electrons to the conduction band, the lattice is destabilized and the band gap collapses to zero. This result supports the conc...

Radiation Dynamics from the Ultra-Intense Field Ionization of Atoms