Thermische Anregungsfunktionen und Normtemperaturen von Atom- und Ionenlinien in Zweikomponentenplasmen

Abstract

Within the temperature region 3,000 °K–50,000 °K and the pressure region 0.1 atm—5 atm thermal excitation functions of several important I, II and III spectral lines of the metals Na, Al, Fe, Zn and C have been calculated by means of a computer. Their optimum temperatures have been tabulated. If these elements are mixed with a second component with an essentially higher ionization energy, such as argon, then the optimum temperatures of atom lines are shifted to lower values. The lowering of the total pressure in the plasma causes the same effect. Moreover a second optimum temperature occurs at approximately 11,000 °K in plasmas of high dilution. This second maximum depends on the starting ionization of argon which decelerates the decrease of the atoms of the metal component. The relationship of the optimum temperature with ionization energy, pressure and concentration can be described by linear equations, according to a previously published approximation formula. The spectral lines of ions are less influenced by these parameters, especially by the second component.