Line broadening in the Si I, Si II, Si III, and Si IV spectra in the helium plasma

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Table 3:

The measured Si II Stark widths.
Transition	$\lambda$ (nm)	T	$W_{\rm m}$	d	e	f	g	h	i	j	k	z
$\rm 3s3p^2 ~^2D_{3/2}{-} 3s^24f~^2F^{\circ}_{5/2}$	207.202	15.6	12.0 $\pm$ 3.4
$\rm 3s3p^2 ~^2D_{5/2}{-} 3s^24f~^2F^{\circ}_{7/2}$	207.270	15.6	10.0 $\pm$ 3.0
$\rm 3s^23d ~^2D_{3/2}{-} 3s^25f~^2F^{\circ}_{5/2}$	290.428	15.6	311 $\pm$ 62
$\rm 3s^23d ~^2D_{5/2}{-} 3s^25f~^2F^{\circ}_{7/2}$	290.569	15.6	349 $\pm$ 70
$\rm 3s3p^2 ~^2D_{3/2}{-} 3s^24p~^2P^{\circ}_{3/2}$	385.366	15.0	53.5 $\pm$ 9.2	52	57
$\rm 3s3p^2 ~^2D_{5/2}{-} 3s^24p~^2P^{\circ}_{3/2}$	385.602	15.0	49.0 $\pm$ 6.8	50	51		68		107	100	56	73
$\rm 3s3p^2 ~^2D_{3/2}{-} 3s^24p~^2P^{\circ}_{1/2}$	386.260	15.0	43.0 $\pm$ 6.8	50	51		68		105	98	48	76
$\rm 3s^23d ~^2D_{3/2}{-} 3s^24f~^2F^{\circ}_{5/2}$	412.807	15.0	105 $\pm$ 11	97		131	96		158
$\rm 3s^23d ~^2D_{5/2}{-} 3s^24f~^2F^{\circ}_{7/2}$	413.089	15.0	120 $\pm$ 14	101		147	96		160
$\rm 3s^24p ~^2P^{\circ}_{1/2}{-} 3s^24d~^2D_{3/2}$	504.103	15.0	229 $\pm$ 45	254		164	242	390	253
$\rm 3s^24p ~^2P^{\circ}_{3/2}{-} 3s^24d~^2D_{5/2}$	505.598	15.0	250 $\pm$ 50	258		204	240	453	269
$\rm 3s^24p ~^2P^{\circ}_{1/2}{-} 3s^25s~^2S_{1/2}$	595.756	12.5	292 $\pm$ 58	272			304	369	278
$\rm 3s^24p ~^2P^{\circ}_{3/2}{-} 3s^25s~^2S_{1/2}$	597.893	12.5	276 $\pm$ 55	278				408	275
$\rm 3s^24s ~^2S_{1/2}{-} 3s^24p~^2P^{\circ}_{3/2}$	634.710	12.5	185 $\pm$ 37	113		125	124		196	214		244
$\rm 3s^24s ~^2S_{1/2}{-} 3s^24p~^2P^{\circ}_{1/2}$	637.136	12.5	187 $\pm$ 37	99		123	110		193	222	82	234

Note 3. Our measured Si II Stark FWHM ( $W_{\rm m}$ in pm) at given T (in 10³ K $\pm$ 14%) and $N =1\times 10^{23}$ m $^{-3} \pm 13\%$ , with estimated accuracies. The W (in pm) values from other experiments are also given: d (Gonzalez et al. 2002), e (Wollschläger et al. 1997), f (Peréz et al. 1993), g (Lesage et al. 1983), h (Kusch & Schröder 1982), i (Lesage et al., 1977), j (Chiang & Griem 1978), k (Puric et al. 1974), and z (Konjevic et al. 1970) obtained at the following T and N: d (T=18 000 K, $N=1.0\times 10^{23}$ m^-3), e (T=14 300 K, $N=1.0\times 10^{23}$ m^-3), f (T=16 400 K, $N=1.0\times 10^{23}$ m^-3), g (T=16 400 K, $N=1.0\times 10^{23}$ m^-3), h (T=16 400 K, $N=1.0\times 10^{23}$ m^-3), i (T=16 400 K, $N=1.0\times 10^{23}$ m^-3), j (T=16 400 K, $N=1.0\times 10^{23}$ m^-3), k (T=16 400 K, $N=1.0\times 10^{23}$ m^-3), and z (T=8 500 K, $N = 1.82 \times 10^{23}$ m^-3). Atomic data are taken from NIST.

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