نتایج جستجو برای: doppler broadening
تعداد نتایج: 56936 فیلتر نتایج به سال:
In radionuclide treatment, tumor cells are primarily destroyed by charged particles emitted by the compound while associated higher energy photons are used to image the tumor in order to determine radiation dose and monitor shrinkage. However, the higher energy photons are difficult to image with conventional collimated Anger cameras, since a tradeoff exists between resolution and sensitivity, ...
A theory for calculating the momentum distribution of annihilating positron-electron pairs in solids is presented. To test the theory, momentum distributions are measured by the Doppler broadening of the annihilation radiation for several bulk metals and semiconductors, as well as for semiconductor alloys and for positrons trapped at vacancies in semiconductors. The theory is based on a two-par...
Abstract The dynamics and spectral characteristics of supernova ejecta reveal details the energetics, explosive nucleosynthesis, evolution progenitor. However, in practice, this important diagnostic information is only derived from CCD-resolution X-ray spectra shock-heated material. If were to be observed at higher resolution, then clues explosion energetics would obvious through measurements b...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید