Publication

Dispersive coherence-enhanced radiology: Experimental test and modeling

Giorgio Margaritondo, Amela Groso
2002
Journal Articles

Abstract

Can the photon energy dependence of coherence-enhanced radiographs lead to elemental identification? Our tests pave the way to a positive response by showing that image details do change as the photon energy crosses an absorption threshold. The observed changes are explained by a simple model of the interplay between the real and imaginary parts of the refractive index. (C) 2002 American Institute of Physics.

Official source

https://infoscience.epfl.ch/entities/publication/1fb5aafc-c24a-4397-9f71-df7cd53833b5

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Giorgio Margaritondo, Amela Groso
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1fb5aafc-c24a-4397-9f71-df7cd53833b5

About this result

Related concepts (20)

Two-photon absorption

In atomic physics, two-photon absorption (TPA or 2PA), also called two-photon excitation or non-linear absorption, is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy, most commonly an excited electronic state. Absorption of two photons with different frequencies is called non-degenerate two-photon absorption.

Photon

A photon () is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless, so they always move at the speed of light in vacuum, 299792458m/s (or about ). The photon belongs to the class of boson particles. As with other elementary particles, photons are best explained by quantum mechanics and exhibit wave–particle duality, their behavior featuring properties of both waves and particles.

Two-photon physics

Two-photon physics, also called gamma–gamma physics, is a branch of particle physics that describes the interactions between two photons. Normally, beams of light pass through each other unperturbed. Inside an optical material, and if the intensity of the beams is high enough, the beams may affect each other through a variety of non-linear effects. In pure vacuum, some weak scattering of light by light exists as well. Also, above some threshold of this center-of-mass energy of the system of the two photons, matter can be created.