JMSSJ On-line

JMSSJ On-line, Vol. 50 (2002) No. 1, pp. 24-32

Studies of Doubly Charged Molecular Ions Using High-Resolution Double Charge Transfer Spectrometer		>> Full Text PDF >> References
*Osamu FURUHASHI,^a) Tohru KINUGAWA,^b) Suomi MASUDA,^a) Chikashi YAMADA,^a),b) and Shunsuke OHTANI^a),b)** ^*Present address: Research Center for Measurement in Advanced Science, Rikkyo University (3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan) ^a)Institute for Laser Science, The University of Electro-Communications (1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan) ^b)Cold Trapped Ions Project, ICORP, Japan Science and Technology Corporation (Axis Chofu 3F, 1-40-2 Fuda, Chofu, Tokyo 182-0024, Japan)

A double charge transfer (DCT) spectrometer has been developed to study doubly charged molecular ions (molecular dications). For N₂²⁺, CO²⁺, and C₂H₂²⁺, vibrationally resolved DCT spectra were observed for the first time. The advantages of DCT spectroscopy are shown by comparing with other spectroscopic methods that enable to resolve the vibrational states of molecular dications. Details of the spectrometer are also described.

Key words: Double charge transfer spectroscopy, Doubly charged molecular ion, Dication