(quasiparticle that is quantum of plasma vibration)
A plasmon is a quasiparticle that is a quantum
of plasma vibration. Plasmons occur in plasma
and a specific type, a surface plasmon, occurs on the
surface of solid metal (e.g., copper, tin).
One type of Plasmon decay (the cessation of a plasmon,
"repackaging" its energy) leads to a pair of neutrinos,
which is a cooling mechanism (method of exporting
energy) theorized to occur in some giant stars,
and in white dwarfs and some layers of neutron stars.
White dwarfs and the neutron star layers have degenerateelectrons that roam freely and function as a very dense plasma.