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Communication: Spectroscopic measurements for HfF+ of relevance to the investigation of fundamental constants
2. A. E. Leanhardt
, J. L. Bohn
, H. Loh
, P. Maletinsky
, E. R. Meyer
, L. C. Sinclair
, R. P. Stutz
, and E. A. Cornell
, e-print arXiv:1008.2997v2
11. C. Linton, B. Simard, H. P. Loock, S. Wallin, G. K. Rothschopf, R. F. Gunion, M. D. Morse, and P. B. Armentrout, J. Chem. Phys. 111, 5017 (1999).
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The properties of the HfF+ cation are thought to be well-suited for investigations of the electron electric dipole moment (eEDM) and temporal variations of the fine structure constant. Precision spectroscopicmeasurements involving the X1Σ+ and low-lying 3Δ1 states have been proposed to measure both. Due to the lack of data for HfF+, the design of these experiments has relied entirely on the predictions of electronic structure calculations.Spectroscopic characterizations of the X1Σ+, 3Δ1, 3Δ2 and 3Δ3 states are reported. The results further support the contention that HfF+ is a viable candidate for eEDM measurements. The spacings between adjacent X1Σ+ and 3Δ1 levels are found to be less favorable for the proposed studies of the fine structure constant.
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