annihilation radiation वाक्य
उदाहरण वाक्य
मोबाइल
- Annihilation radiation is not monoenergetic, unlike gamma rays produced by radioactive decay.
- The production mechanism of annihilation radiation introduces Doppler broadening.
- A Germanium detector spectrum showing the annihilation radiation peak ( under the arrow ).
- This work and that on annihilation radiation made him one of the first and leading experts on anti-matter.
- Hence, measuring the angular correlation of the annihilation radiation yields information about the momentum distribution of the electrons in the solid.
- Either one measures the Doppler broadening of the annihilation radiation ( DBAR ) or the angular correlation of the annihilation radiation ( ACAR ).
- Either one measures the Doppler broadening of the annihilation radiation ( DBAR ) or the angular correlation of the annihilation radiation ( ACAR ).
- Although the full momentum information about the momentum of the electron is encoded in the annihilation radiation, due to technical limitations it cannot be fully recovered.
- When an electron and a positron annihilate, the annihilation radiation conserves the momentum of the initial electron by a Doppler shift and an angular deviation from collinearity.
- The annihilation peak produced in a gamma spectrum by annihilation radiation therefore has a higher full width at half maximum ( FWHM ) than other gamma rays in spectrum.
- "' Angular Correlation of Electron Positron Annihilation Radiation ( ACAR or ACPAR ) "'is a technique of solid state physics to investigate the electronic structure of metals.
- Because of their well-defined energy ( 511 keV ) and characteristic, Doppler-broadened shape, annihilation radiation can often be useful in defining the energy calibration of a gamma ray spectrum.
- Work by Gordon Brownell, Charles Burnham and their associates at the Massachusetts General Hospital beginning in the 1950s contributed significantly to the development of PET technology and included the first demonstration of annihilation radiation for medical imaging.
- A remarkable astrophysical prediction of the Chapline Laughlin theory is that dark energy stars should be prolific sources of positrons because nucleons decay when they encounter the surface of a dark energy star, which may explain the strong positron annihilation radiation observed coming from the central region of our galaxy.
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