Stark Widths and Oscillator Strengths of Xe III Lines (Part II)

Abstract

Stark widths and relative oscillator strengths were measured for more than 130 Xe III spectral lines emitted in a pulsed capillary discharge. As usual, these parameters become attainable once the deconvolution of line profiles is performed. In particular, 4f–6d, 5d–4f, 5d–6p, 6p–6d, 6p–7s and 6s–4f Xe III transitions have been considered. Extensive configuration interaction (CI) along with least-squares fitted atomic parameters were combined in Cowan code calculations, in order to check the quality of agreement with experimental f-values. Comparisons alike, drawn between experimental Stark widths and Griem’s semiempirical approach, guarantee an agreement within a factor of two for the whole of the lines, given a proper choice of the Gaunt factor for each single transition.

Stark broadening measurements of Xe III spectral lines

“…The measured data are classified depending on the experimental error estimation as A (6-10%), B (10-15%) and C (15-20%). The last three columns contain the data of halfwidth measurements from other authors [8][9][10][11]. Different authors performed their measurements at different temperatures, while our measurements are given for the temperature of 22 000 K. All data are normalized to an electron density of 10 23 m −3 .…”

“…Measurements were performed using a pulsed plasma source. Plasma diagnostics data are as follows: electron densities, determined by the two wavelengths interferometric method, were in the range of (0.2-1.6) × 10 23 m −3 , while electron temperatures, determined by the Boltzmann plot technique, were between 18 300 K and 25 500 K. Obtained experimental results are compared with available experimental data of other authors [8][9][10][11] and theoretical calculations based on [12].…”

“…It is of primary importance to have Stark width data for high electron densities, because in this regime Stark broadening is dominant in comparison with other broadening mechanisms. Although the interest exists, only a few papers have been devoted to Xe III Stark width measurements [8][9][10][11].…”

Stark shift measurements of Xe II and Xe III spectral lines

“…Stark broadening and shift of ionized Xe spectral lines have been the subject of many experimental [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and theoretical [20,21] studies, as was previously mentioned in [22,23]. Examination of an ionized xenon spectrum is of great interest for laser techniques [24,25], development of light sources and lamps [26][27][28] or astrophysics [29][30][31][32][33][34][35][36].…”

“…Most of the papers dealing with the Stark broadening of Xe II lines [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][21][22][23] and Xe III lines [17][18][19][20] are devoted to width measurements. Only three papers [6,15,16] give the results of Xe II shift measurements and only one paper [10] gives the results of Xe III shift measurements.…”