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Início
Agenda
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- 27 de novembro de 2019
16h30
Sala
F-149
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Salomon
S Mizrahi
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DF-UFSCar
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The
delimiting/frontier lines of the constituents of matter
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Looking at the chart of nuclides displayed at the
URL of the International Atomic Energy Agency
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(IAEA) [1] that contains all the known nuclides,
the natural and those produced artificially in
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labs, one verifies the existence of two, not quite
regular, delimiting lines between which dwell all
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the nuclides constituting matter. These lines are
established by the highly unstable radionuclides
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located the most far away from those in the central
locus, the valley of stability. Here, making use of
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the "old" semi-empirical mass formula for
stable nuclides together with the energy-time
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relation of quantum mechanics, by a simple
calculation we show that the obtained frontier lines,
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for proton and neutron excesses, present an
appreciable agreement with the delimiting lines. For
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the sake of presenting a somewhat comprehensive
panorama of the matter in our Universe and their
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relation with the frontier lines, we narrate, in
brief, what is currently known about the astrophysical
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nucleogenesis processes.
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