Stark broadening of Kr UV spectral lines

Abstract

This work reports new data for the Stark parameters of doubly ionized krypton spectral lines. Stark widths and shifts of Kr III lines belonging to the UV region (245-300 nm) have been measured. A low-pressure pulsed arc, containing a mixture of 8% krypton and 92% helium, was used as a plasma source. Measured electron densities and electron temperatures were in the range (0.7-2.0)×10 23 m −3 and 16 000-20 000 K, respectively. Experimentally obtained data were compared to theoretical results calculated using simplified modified semiempirical formulas.

Irregularities of Stark parameters of Xe II spectral lines

“…Similar disagreement exists between shift data. The differences between the present and other results [24,28,33] are between 32% and 55%, if we exclude the result from [24] for line 491.966 nm where only shift estimation is given. Only shift results [9,33] for the last line (454.523 nm) in the fifth multiplet in table 1 are in good agreement.…”

“…The calculations were performed only for cases where a complete set of perturbing levels, needed for calculations, were available [27]. Comparison was made only for the results from present and our previous works [8,9,28].…”

“…Estimated errors for both halfwidths and shifts are given in table 1 together with the experimental results obtained in this work. All data previously published in the literature [24,28,[30][31][32][33] have been normalized to electron density of 10 23 m −3 and temperature of 22 000 K, in accordance with T e −1/2 dependence. In five cases, there is a very good agreement of the present halfwidth results with other experimental data [8,24,30].…”

“…Stark widths w S and shifts d S measured in this work (TW) and data taken from the literature[8,9,24,28,[30][31][32][33]. All data are normalized to N e = 10 23 m −3 and temperature of 22 000 K, in accordance with T e −1/2 dependence.…”