Wavelength resolved laser-induced fluorescence emission of trapped in an ion cyclotron resonance cell

We have measured the wavelength resolved fluorescence emission laser-induced fluorescence (LIF) spectrum of C 6 F 3 H 3 + confined in an open cylindrical ion cyclotron resonance Penning trap. Ion cyclotron resonant azimuthal quadrupolar excitation successfully mass-selects and traps the ions for 10 s for repeated laser interrogation, and establishes that the observed fluorescence is from C 6 F 3 H 3 + ions. Electron-induced fluorescence (EIF) emission spectra of the same species were acquired for comparison. Vibrational structure was resolved for both LIF and EIF, and our assignments are consistent with prior literature values in the absence of ion trapping and high magnetic field (3 T). This work represents the first determination of wavelength resolved LIF emission spectra of organic ions in a Penning trap.