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|Type:||Artigo de periódico|
|Title:||Multimode Vibrational Couplings In Resonant Positron Annihilation|
|Abstract:||The mechanisms for multimode vibrational couplings in resonant positron annihilation are not well understood. We show that these resonances can arise from positron-induced distortions of the potential energy surface (target response to the positron field). Though these distortions can transfer energy into single- and multiquantum vibrations, they have so far been disregarded as a pathway to resonant annihilation. We also compare the existing annihilation theories and show that the currently accepted model can be cast as a special case of the Feshbach annihilation theory. © 2011 American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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