Transverse spectrum of bremsstrahlung in finite condensed media

Bremsstrahlung Spectrum in α Decay

Using our previous approach to electromagnetic emission during tunneling, an explicit , essentially classical, formula describing the bremsstrahlung spectrum in α decay is derived. The role of tunneling motion in photon emission is discussed. The shape of the spectrum is a universal function of the ratio E γ /E 0 , where E γ is the photon energy and E 0 is a characteristic energy depending only...

Coherent phonons in condensed media

The impulsive excitation and phase sensitive detection of coherent pho nons and phonon polaritons provide a detailed insight into the dynamical properties of matter The experiments are based on optical pump probe techniques with fem tosecond time resolution These techniques enable the detection of amplitude and phase of the coherent lattice motion simultaneously Frequencies in the THz range and...

Excitation energy transfer in condensed media

We derive an expression for resonance energy transfer between a pair of chromophores embedded in a condensed medium by considering the energy splitting of the chromophores from their resonant excited states. We employ time-dependent density functional response theory in our derivation. The linear response theory treatment is rigorous within the framework of time-dependent density functional the...

Transverse myelitis spectrum disorders.

Acute transverse myelitis (ATM) is an inflammatory demyelinating disorder that affects the spinal cord focally resulting in motor sensory and autonomic dysfunction. Establishing the diagnosis of ATM is not as difficult as determining the possible etiology. There is a difference in the perception of ATM seen in the West as compared to developing countries. In the West multiple sclerosis (MS) is ...

Refractive-index measurement of absorbing condensed media.