Table 2: The Ar I line broadening characteristics. Measured: total Stark FWHM ( $W_{\rm t}^{\rm exp}$ in pm within $\pm $12% accuracy), electron Stark width ( $W_{\rm e}^{\rm exp}$in pm within $\pm $12% accuracy), ion Stark width ( $W_{\rm i}^{\rm exp}$ in pm within $\pm $12% accuracy), static ion broadening parameter ( $A^{\rm exp}$, dimensionless within $\pm $15% accuracy) and ion-dynamic coefficient ( $D^{\rm exp}$, dimensionless within $\pm $20% accuracy) at measured electron temperature ( $T^{\rm exp}$ in 10$^{\rm 3}$ K) and electron density ( $N^{\rm exp}$ in 10$^{\rm 22}$ m$^{\rm -3}$). Ref represents the values given in this work (Tw) and those used from other authors: KM, Kusz & Mazur (1996); B, Bues et al. (1969); G, Gericke (1961); J, Jones et al. (1986); HW, Hahn & Woltz (1990); A, Aparicio et al. (1998); P, Powell (1969); MM, Musielok et al. (1976); JP, Jones et al. (1987); M, Musielok (1994); Ch, Chapelle et al. (1967); Gr, Griem (1962). The index G denote theoretical data taken from Griem (1974) at a given Tand N.

Multiplet		 $\lambda$ (nm) $T^{\rm exp}$ $N^{\rm exp}$ $W_{\rm t}^{\rm exp}$ $W_{\rm e}^{\rm exp}$ $W_{\rm i}^{\rm exp}$ $A^{\rm exp}$ $D^{\rm exp}$ Ref. $W^{\rm G}_{\rm e}$ $A^{\rm G}$

${[3/2]_1^{\rm o}-[1/2]_{\rm o}}$		 419.83 15.6 6.7 130 112 18 0.143 1.347 Tw 223 0.113
    16.0 7.0 137 117 20 0.145 1.656 Tw 235 0.114
    16.2 7.1 139 119 20 0.145 1.649 Tw 239 0.114
    11.1 0.4 3.3         KM    
    12.4 7.3 120         B    
    14.0 1.0 23         G    
${[3/2]_2^{\rm o}-[3/2]_2}$ 415.86 15.6 6.7 132 114 18 0.143 1.332 Tw    
    16.0 7.0 139 119 20 0.146 1.638 Tw    
    16.2 7.1 143 122 21 0.147 1.624 Tw    
    11.9 6.2 121     0.127   J    
    11.9 6.2 112     0.125   HW    
    13.5 10.0 246         A    
    12.7 9.4 173         B    
    11.4 4.6 110         G    
    14.0 1.0 18.3         P    
    12.5 9.2 190         MM    
    11.9 6.2 123     0.127   JP    
    13.4 4.5 107         M    
${[3/2]_2^{\rm o}-[3/2]_1}$ 416.42 15.6 6.7 126 109 17 0.140 1.357 Tw    
    16.0 7.0 134 115 19 0.142 1.664 Tw    
    16.2 7.1 134 115 19 0.142 1.663 Tw    
    11.9 6.2 97     0.196   HW    
    13.8 14.5 332         Ch    
    11.1 0.4 3.7         KM    
    12.7 9.4 171         B    
    11.4 4.6 100         G    
    14.0 1.0 18.1         P    
    10.6 2.6 59.6         MM    
    11.5 5.1 96         M    
${[3/2]_1^{\rm o}-[3/2]_2}$ 426.63 15.6 6.7 127 110 27 0.132 1.380 Tw    
    16.0 7.0 130 113 27 0.132 1.712 Tw    
    16.2 7.1 136 118 28 0.134 1.689 Tw    
    11.9 6.2 126     0.076   HW    
    11.4 4.6 110         G    
    14.0 1.0 17.9         P    
    12.6 9.9 240         M    
${[3/2]_2^{\rm o}-[5/2]_3}$ 420.07 15.6 6.7 138 119 19 0.140 1.325 Tw 153 0.085
    16.0 7.0 143 123 20 0.142 1.636 Tw 162 0.085
    16.2 7.1 147 126 21 0.142 1.624 Tw 165 0.085
    13.8 14.5 324         Ch    
    11.1 0.4 2.8         KM    
    12.7 9.4 155         B    
    11.4 4.6 100         G    
    12.6 9.2 180         GR    
    13.4 4.5 94         M    


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