3. Results

Our experimental results of the measured Stark HWHM and shift values (in 0.1 nm) at 54 000 K electron temperature and m^-3 electron density are given in the Table 1 (click here) together with transition arrays and multiplet numbers

 

transition    multip.

2p3s-    567.956   0.380 -0.01     -     -     -     -

(3)    568.621   0.325 -0.01     -     -     -     -

   567.602   0.340 -0.01     -     -     -     -

   566.664   0.375 -0.01     -     -     -     -

   463.054   0.250 0.02     -     -     -     -

(5)    464.309   0.260 0.06     -     -     -     -

   399.500   0.270 0.06   0.60   0.56   0.60   1.01 (12)

2p3p-    594.167   0.260     -     -     -     -     - (28)

2s2p3s-    451.092   0.180 -0.01   0.45   0.64   0.78   0.93

(3)    451.489   0.230 -0.01   0.59   0.75   0.91   1.09

2s2p3p-    393.852   0.170 -0.03     -     -     -     - (8)

   486.718   0.260 -0.02   0.59   0.70   0.79   1.14

(9)    486.133   0.290 -0.02   0.66   0.78   0.88   1.27

   454.636   0.255 -0.05     -     -     -     - (13)

   298.358   0.200 -0.01     -     -     -     -     (UV25)

2s3s-    347.869   0.205 0.01     -   1.29   1.75   1.55

(1)    348.298   0.165 0.01     -   1.03   1.39   1.23

   348.490   0.200 0.01     -   1.26   1.72   1.52

   374.766   0.250 0.03     -     -     -     - (8)

2s3p-    405.780   0.205 0.07   0.64   0.94   1.31   1.31 (3)

 

Following ratios are also given in the same table, where are the existing Stark HWHM values calculated on the basis of various theoretical approximations initiated by Dimitrijevic & Konjevic (1980, 1981a,b) for the investigated NII, NIII and NIV spectral lines. Griem's (1974) theoretical results for several NII spectral lines are given up to 40 000 K electron temperature. Therefore, the comparison of our measured Stark widths of relevant NII spectral lines with Griem's (1974) theory, at our electron temperature of 54 000 K, is omitted. Thus, and denote results of the semi-empirical and modified semiempirical predictions using Eqs. (4)-(5) and Eqs. (7)-(10), respectively, from Dimitrijevic & Konjevic (1980, 1981a). and denote values obtained on the basis of the semiclassical approximation (Griem 1974 and references therein) with 1.4 instead of 5-(4.5/Z) on the right-hand-side of Eq. (12) in Dimitrijevic & Konjevic (1980) for the values. denote Stark HWHM calculated on the basis of the semiclassical theory by Dimitrijevic & Konjevic (1981b). For the investigated spectral lines no theoretical Stark shift predictions exist at 54 000 K electron temperature, to the knowledge of the authors.