نتایج جستجو برای: positron
تعداد نتایج: 31378 فیلتر نتایج به سال:
We present Quantum Monte-Carlo results for various positron-electron systems. We discuss the energetics of the bound state of a positronium (Ps) with finite atomic systems: a massive point charge Z, hydrogen (H) and lithium (Li). We also analyze the screening cloud around the positron in the positronium hydride flips) and in the homogeneous electron gas in order to determine the positron annihi...
Diffusive TeV gamma-ray emissions have been recently discovered extending beyond the pulsar wind nebulae of a few middle-aged pulsars, implying that energetic electron/positron pairs are escaping from and radiating in ambient interstellar medium. It has suggested these extended constitute distinct class nonthermal sources, termed "pulsar halos". In this article, I will review research progress ...
BACKGROUND High-dose chemotherapy followed by autologous stem cell transplantation is the standard treatment for relapsed and/or refractory Hodgkin's lymphoma although half of patients relapse after transplantation. Predictive factors, such as relapse within 12 months, Ann-Arbor stage at relapse, and relapse in previously irradiated fields are classically used to identify patients with poor out...
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