Flame-enhanced laser-induced breakdown spectroscopy.
Flame-enhanced laser-induced breakdown spectroscopy (LIBS) was investigated to improve the sensitivity of LIBS. It was realized by generating laser-induced plasmas in the blue outer envelope of a neutral oxy-acetylene flame. Fast imaging and temporally resolved spectroscopy of the plasmas were carried out. Enhanced intensity of up to 4 times and narrowed full width at half maximum (FWHM) down to 60% for emission lines were observed. Electron temperatures and densities were calculated to investigate the flame effects on plasma evolution. These calculated electron temperatures and densities showed that high-temperature and low-density plasmas were achieved before 4 µs in the flame environment, which has the potential to improve LIBS sensitivity and spectral resolution.
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L
Liu
S
S
Li
X N
XN
He
X
X
Huang
C F
CF
Zhang
L S
LS
Fan
M X
MX
Wang
Y S
YS
Zhou
K
K
Chen
L
L
Jiang
J F
JF
Silvain
Y F
YF
Lu