Hyperfine Structure Constants for Neutral and Singly Ionized Vanadium by Fourier Transform Spectroscopy Data

The hyperfine structure (HFS) for V I and V II were investigated using the archival data recorded by the Fourier transform spectrometer (FTS) at the US National Solar Observatory (NSO) with a fitting program written by us. The magnetic dipole HFS constant A values for 53 levels of V I between 0 and 52,948 cm(-1) and for 56 levels of V II between 36 and 72,952 cm(-1) are obtained, of which 46 results for V I and 50 results for V II are reported for the first time, as far as we know. And to our knowledge, so far, the A constants of 370 levels of V I and 76 levels of V II have been measured in literature. The new results obtained in this work supplement more experimental HFS data very useful in astrophysics and atomic physics etc.. (C) 2022 Elsevier Ltd. All rights reserved.