Abstract
New radiative lifetimes are reported for 168 levels of V I ranging in energy from 18086 cm(-1) to 47702 cm(-1), and for 31 levels of V II ranging in energy from 34593 cm(-1) to 47420 cm(-1). These lifetimes are measured using time-resolved laser-induced fluorescence on a slow atomic/ionic beam as part of an ongoing study of the radiative properties of the iron group elements. All but two of the V II lifetimes have been measured before using modern laser-based methods, but a large fraction of the V I lifetimes are reported here for the first time. Comparison to earlier measurements is discussed. These new lifetimes are, for the most part, accurate to +/- 5%. They will be combined with branching fraction measurements to produce a large set of transition probabilities for V I and V II which are needed by the astrophysics community for stellar abundance determinations.