Microscopy techniques based on electrons and X-ray photons have been used to 'look' inside matter for decades. In the past few years, advances in instrumentation and software have led to ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Two-photon emission (2PE) is a process in which an electron transition between quantum levels occurs through the simultaneous emission of two photons. Two-photon emission is interesting because it ...

The process begins with the absorption of X-ray photons by atoms in the material, leading to the ejection of photoelectrons. By analyzing the energy spectrum of these photoelectrons, information about ...