Plasmons in strongly coupled shock-compressed matter.
We present the first measurements of the plasmon dispersion and damping in laser shock-compressed solid matter. Petawatt laser produced K-α radiation scatters on boron targets compressed by a 10 ns-long 400 J laser pulse. In the vicinity of the Fermi momentum, the scattering spectra show dispersionless, collisionally damped plasmons, indicating a strongly coupled electron liquid. These observations agree with calculations that include the Born-Mermin approximation to account for electron-ion collisional damping and local field corrections reflecting electron-electron correlations.
Neumayer
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P
Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
Fortmann
C
C
Döppner
T
T
Davis
P
P
Falcone
R W
RW
Kritcher
A L
AL
Landen
O L
OL
Lee
H J
HJ
Lee
R W
RW
Niemann
C
C
Le Pape
S
S
Glenzer
S H
SH