نتایج جستجو برای: positron annihilation
تعداد نتایج: 38674 فیلتر نتایج به سال:
OF THE DISSERTATION Energy-resolved positron-molecule annihilation: Vibrational Feshbach resonances and bound states
The observations of a strong and extended positron-electron annihilation line emission in the Galactic center (GC) region by the Spectrometer on the International Gamma-Ray Astrophysical Laboratory (SPI/INTEGRAL) are challenging to the present models of positron sources in the Galaxy. In this paper, we study the possibility of pulsar winds in the GC to produce the 511 keV line. We propose that ...
Energy-resolved studies of positron-molecule collisions exhibit vibrational Feshbach resonances in annihilation, thus providing evidence that positrons can bind to these species. The downshifts of the observed resonances from the positions of the vibrational modes provides a measure of the positron-molecule binding energies, which range from 1 to 300 meV. Reported here are annihilation spectra ...
The effect of high-pressure torsion (HPT) on the corrosion behavior a bioresorbable MgCaZn alloy (ZX00) is studied by positron annihilation.
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