Calibration of the Stark-broadening parameters for some He i lines

Ion contribution to the astrophysical important 388.86, 471.32 and 501.56 nm He I spectral lines broadening

“…Theoretical W t values presented by Bassalo et al (1982) in pm within ±12% accuracy), static ion broadening parameter (A exp , dimensionless within ±15% accuracy) and ion dynamic coefficient (D exp , dimensionless within ±20% accuracy) at a given electron temperature (T in 10 3 K) and electron density (N in 10 22 m −3 ). Ref presents the values given in this work (Tw) and those used from other authors: K, Kelleher (1981); B, Berg et al (1962); KK, Kobilarov et al (1989); RS, Roder & Stampa (1964); PL, Purić et al (1970); BG, Büscher et al (1995); P, Pérez et al (1991); M, Mijatović et al (1995); Ga, Gauthier et al (1981); VK, Vujičić & Kobilarov (1988). The index G, BCW and DSB denote theoretical data taken from Griem (1974), Bassalo et al (1982) and Dimitrijević & Sahal-Bréchot (1990), respectively at a given T and N. 3%-18% with the best agreement for the 447.15 nm line (see Fig.…”

“…Ratios of the experimental total Stark FWHM (W exp t ) to the various theoretical (W th t ) predictions vs. electron temperature for λ = 667.82 nm. , ♦, ∇, , and represent our experimental data and those from Gauthier et al (1981), Mijatović et al (1995), Pérez et al (1991), Kelleher (1981), and Vujičić & Kobilarov (1988), respectively. Filled, empty and half divided symbols represent the ratios related to the theories taken from Griem (1974), Bassalo et al (1982) and Dimitrijević & Sahal-Bréchot (1990), respectively.…”

Stark broadening of lines from transition between statesn = 3 ton = 2 in neutral helium

“…Kobilarov et al (1989) reported only a shift increment for electron densities between 6.1 × 10 22 and 9.8 × 10 22 m −3 , and these results are not included in this consideration. Some authors, for example Berg et al (1962);Bötticher et al (1963); Lincke (1964); Greig & Jones (1970) reported shifts measured at peak positions while others (Kelleher 1981;Gauthier et al 1981;Vujičić & Kobilarov 1988;Vujičić et al 1989;Kobilarov et al 1989;Pérez et al 1991;Djeniže et al 1995;Mijatović et al 1995) reported shifts measured at the half-width level position. We presented the experimentally obtained shift values in slightly deviate from this trend for He I 5016.…”

“…The other two broadening mechanisms are negligible (see Table 5). From this analysis we A135, page 8 of 13 He I 3889 He I 7065 (b) Wulff 1958Berg et al 1962Bötticher et al 1963Lincke 1964Greig & Jones 1970Morris and Cooper 1973Einfeld & Sauerbrey 1975Chiang et al 1977Soltwisch & Kusch 1979Kelleher 1981Pérez et al 1991Mijatović et al 1995Djeniže 1995Milosavljević & Djeniže 2002b Griem 1974 (at T = 20000K) Bassalo et al 1982Sahal-Bréchot et al 2013 This …”

“…For the comparison, we used theoretical (Griem 1974;Bassalo et al 1982;Sahal-Bréchot et al 2013) and experimental data (Wulff 1958;Berg et al 1962;Bötticher et al 1963;Lincke 1964;Greig & Jones 1970;Kusch 1971; Vujičić et al 1989;Kobilarov et al 1989;Pérez et al 1991Pérez et al , 1995Büscher et al 1995;Djeniže et al 1995;Mijatović et al 1995;Milosavljević & Djeniže 2002a,b, 2003Pérez et al 2003;Gao et al 2008). The experimental data were obtained form various plasma sources with different plasma conditions and with different plasma diagnostic methods.…”