Enhancement of molecular ions in mass spectrometry using an ultrashort optical pulse in multiphoton ionization

Takashi Shimizu, Yuka Watanabe-Ezoe, Satoshi Yamaguchi, Hiroko Tsukatani, Tomoko Imasaka, Shin Ichi Zaitsu, Tomohiro Uchimura, Totaro Imasaka

Research output: Contribution to journalArticle

12 Citations (Scopus)


The spectral domain of an ultraviolet femtosecond laser was expanded by stimulated Raman scattering/four-wave Raman mixing, and the resulting laser pulse was compressed using a pair of gratings. The pulse width was then measured using an autocorrelator comprised of a Michelson interferometer equipped with a multiphoton ionization/mass spectrometer which was used as a two-photon detector. A gas chromatograph/mass spectrometer was employed to analyze triacetone triperoxide (TATP), and the molecular ion induced by multiphoton ionization was substantially enhanced by decreasing the laser pulse width.

Original languageEnglish
Pages (from-to)3441-3444
Number of pages4
JournalAnalytical chemistry
Issue number9
Publication statusPublished - May 1 2010


All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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