Millimeter-wave spectroscopy of the SiCl+ ion

Kazuki Takeda, Satoshi Masuda, Kensuke Harada, Keiichi Tanaka

Research output: Contribution to journalArticlepeer-review


The millimeter-wave spectrum of the SiCl+ ion in the ground and first excited vibrational states was observed for the two isotopic (35Cl and 37Cl) species. The ion was generated in a free-space absorption cell by a hollow cathode discharge of SiCl4 diluted with He and discriminated from neutral species by the magnetic field effect on the absorption lines. The observed millimeter-wave spectrum was combined with a previously reported diode laser spectrum in an analysis to determine mass-independent Dunham coefficients as well as the mass scaling parameters. The equilibrium bond length of SiCl+ determined is re = 1.943 978(2) Å.

Original languageEnglish
Pages (from-to)168-171
Number of pages4
JournalChemical Physics Letters
Publication statusPublished - May 1 2016

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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