gamma-ray conversion

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• Gamma ray burst emission mechanisms — are theories that explain how the energy from a gamma ray burst progenitor (regardless of the actual nature of the progenitor) is turned into radiation. These mechanisms are a major topic of research as of 2007. Neither the light curves nor the… …   Wikipedia

• gamma ray — Physics. 1. a photon of penetrating electromagnetic radiation (gamma radiation) emitted from an atomic nucleus. 2. a photon emitted by an electron as a result of internal conversion. 3. electromagnetic radiation with wavelengths shorter than… …   Universalium

• gamma ray — noun electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength • Syn: ↑gamma radiation • Hypernyms: ↑electromagnetic radiation, ↑electromagnetic wave, ↑nonparticulate radiation • Part Holonyms: ↑ …   Useful english dictionary

• Compton Gamma Ray Observatory — General information NSSDC ID 1991 027B Organization NASA …   Wikipedia

• Conversion electron — A conversion electron is a term used to describe an electron which results from the internal conversion process. Internal conversion is a process in which a nucleus can transfer its energy to an atomic electron. Due to their close proximity to… …   Wikipedia

• Gamma spectroscopy — The gamma ray spectrum of natural uranium, showing about a dozen discrete lines superimposed on a smooth continuum, allows the identification the nuclides 226Ra, 214Pb, and 214Bi of the uranium decay chain. Gamma ray spectroscopy is the… …   Wikipedia

• gamma decay — Type of radioactivity in the most common form of which an unstable atomic nucleus dissipates energy by gamma emission, producing gamma rays. Gamma decay also includes two other processes, internal conversion and internal pair production. In… …   Universalium

• Internal conversion — This article is about the nuclear process. For the chemical process, see Internal conversion (chemistry). Internal conversion is a radioactive decay process where an excited nucleus interacts with an electron in one of the lower atomic orbitals,… …   Wikipedia

• Ultra-high-energy cosmic ray — Unsolved problems in physics Why is it that some cosmic rays appear to possess energies that are theoretically too high? In high energy physics, an ultra high energy cosmic ray (UHECR) or extreme energy cosmic ray (EECR) is a cosmic ray with an… …   Wikipedia

• Internal conversion coefficient — In nuclear physics, the internal conversion coefficient describes the rate of internal conversion.The internal conversion coefficient may be empirically determined by the following formula::alpha = frac{mbox{number of de excitations via electron… …   Wikipedia

• Pair-conversion — A pair conversion instrument detects high energy gamma rays by providing an environment generally a thin foil of dense metal, commonly tungsten in which they tend to generate electron positron pairs, and then using standard particle physics… …   Wikipedia