Spontaneous emission from the C3 radical in carbon plasma

Appl Opt. 2007 Jul 1;46(19):4032-40. doi: 10.1364/ao.46.004032.

Abstract

Spontaneous emission measurements are discussed for the Swings transitions of the C(3) radical in laser-generated graphite plasma, and the spectroscopy of the C(3) radical in carbon vapor and plasma is summarized. A review is given of some theoretical calculations and emission spectroscopic investigations are presented. Time-averaged, laser-induced optical breakdown spectra are reported from Nd:YAG laser generated graphite microplasma. In 200-300 Torr of argon and helium, and depending on the specific experimental configuration, a weak emission continuum is observed centered at 400 nm when using a laser fluence of typically 1 J/cm(2). Such continua were not detected in our previous experiments using focused laser radiation. The possibilities for the origin of this continuum are considered.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Argon / analysis
  • Carbon / chemistry*
  • Equipment Design
  • Free Radicals
  • Gases
  • Graphite
  • Helium / analysis
  • Lasers*
  • Nanotechnology / instrumentation
  • Nanotechnology / methods*
  • Spectrophotometry / methods
  • Time Factors

Substances

  • Free Radicals
  • Gases
  • Helium
  • Argon
  • Carbon
  • Graphite