Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Electron-like or hole-like quasiparticles can be created when these are bombarded by X-rays, making them useful for high precision detection of X-ray energy. First proposed by Froehlich, they were experimentally corroborated by the isotope effect and the evidence for a condensation to a boson-like state at the superconducting transition temperature. They are caused by the exchange of phonons. Named for one of the winners of the 1972 Nobel Prize in Physics, FTP, identify this phenomenon important in the BCS theory of superconductivity, a type of coupling of electrons.
Science