REMPI Spectroscopy of HfF

Abstract

The spectrum of electronic states at 30000--33000 cm${}^{-1}$ in hafnium fluoride has been studied using (1+1) resonance-enhanced multi-photon ionization (REMPI) and (1+1${}^{\prime }$) REMPI. Six ${\Omega }^{\prime }=3/2$ and ten ${\Pi }_{1/2}$ vibronic bands have been characterized. We report the molecular constants for these bands and estimate the electronic energies of the excited states using a correction derived from the observed isotope shifts. When either of two closely spaced ${\Pi }_{1/2}$ electronic states is used as an intermediate state to access autoionizing Rydberg levels, qualitatively distinct autoionization spectra are observed. The intermediate state-specificity of the autoionization spectra bodes well for the possibility of using a selected ${\Pi }_{1/2}$ state as an intermediate state to create ionic HfF${}^{+}$ in various selected quantum states, an important requirement for our electron electric dipole moment (eEDM) search in HfF${}^{+}$.

11 pages, 8 figures, 1 table

References in corpus (4)

• Candidate molecular ions for an electron electric dipole moment experiment
• Broadband velocity modulation spectroscopy of HfF^+: towards a measurement of the electron electric dipole moment
• Laser-induced fluorescence studies of HfF+ produced by autoionization
• Near-infrared LIF spectroscopy of HfF

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• Chiral molecule candidates for trapped ion spectroscopy by ab initio calculations: from state preparation to parity violation
• Visible and Ultraviolet Laser Spectroscopy of ThF
• Optical Pumping of TeH+: Implications for the Search for Varying mp/me
• A low-temperature external cavity diode laser for broad wavelength tuning