Researchers at the European XFEL have developed a new device for X-ray measurements at high photon energies—a so-called Laue ...

Two-photon emission is a relatively weak emission process, about five orders of magnitude weaker than the usual single-photon emission that occurs in semiconductor lasers or LEDs. So we had to use ...

This dwell time before re-emission is what is confusing to many ... If one were to think of this pulse as discrete quanta of photon particles, it’d seem to break causality, but as a wave ...

This means that each electron transition will produce a photon of a different frequency and hence a different colour. This causes line emission spectra to be produced, as shown below. This is not ...

Procedures such as X-rays; computed tomography (CT); magnetic resonance imaging (MRI); positron emission tomography (PET) and single-photon emission computed tomography (SPECT) are important in ...

Photon upconversion involves a series of non-linear optical processes where the sequential absorption of two or more photons leads to the emission of a single photon with energy greater than the sum ...

Our research is focused on the development of new molecular imaging tools and radiopharmaceuticals for positron emission tomography (PET) and single-photon emission computed tomography (SPECT) imaging ...

the FDA approved Flyrcado for patients with known or suspected coronary artery disease (CAD), delivering higher diagnostic efficacy compared to single-photon emission computed tomography (SPECT ...

Researchers at the European XFEL have developed a new device for X-ray measurements at high photon energies–a so-called Laue spectrometer. It enables X-ray light with photon energies of over 15 ...