Resolving an anomaly between measured spectral linewidths of n =3 transitions in N II and O III spectra

摘要: A reported anomaly in the experimental scaling of widths Stark broadened n=3, Delta n=0 spectral lines along carbon isoelectronic sequence is not observed present experiments. The ratio omega(N)/omega(O) for N II compared to those narrower O III same transitions now measured as lying between two theoretical predictions, both which show a value omega(z-1)/omega(z) greater than unity continuing throughout sequence. In earlier measurements, (in frequency units) were actually being smaller III, i.e., less unity.