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[vibok AT phys.unideb.hu]

Meghívó

 Debreceni Egyetem, TTIK Fizikai Intézet

        Előadó:
        Lorenz S. Cederbaum
        Heidelbergi Egyetem, Fizikai Kémiai Intézet

        Cím: On systems with and without excess energy in environment,
             ICD and other interatomic mechanism

        Időpont: 2016. 06. 03 (péntek), 11:00 h

        Helyszín: DE, Élettudományi Épület, ETK F 003-004
        4032 Debrecen, Egyetem tér 1

        Absztrakt:
How does a microscopic system like an atom or a small molecule get rid of
the excess electronic energy it has acquired, for instance, by absorbing a
photon? If this microscopic system is isolated, the issue has been much
investigated and the answer to this question is more or less well
known. But what happens if our system has neighbors as is usually the case
in nature or in the laboratory? In a human society, if our stress is
large, we would like to pass it over to our neighbors.
Indeed, this is in brief what happens also to the sufficiently excited
microscopic system. A new mechanism of energy transfer has been
theoretically predicted and verified in several exciting
experiments. This mechanism seems to prevail “everywhere” from
the extreme quantum system of the He dimer to water and even to quantum
dots. The transfer is ultrafast and typically dominates other relaxation
pathways.

Can there be interatomic/intermolecular processes in environment when the
system itself (again, an atom or small molecule) does not possess excess
energy? The answer to this intriguing question is yes. The possible
processes are introduced and discussed. Examples and arguments are
presented which make clear that the processes in question play a
substantial role in nature and laboratory.



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