Characterization of an Atmospheric-Pressure Argon Plasma Generated by 915 MHz Microwaves Using Optical Emission Spectroscopy

Table 1

Parameters of selected argon emission lines used to determine the excitation temperature of the electrons T_exc. n/m: energy levels upper/lower, respectively; λ_nm: wavelength of transition n → m, A_nm: Einstein coefficient for transition n → m, : statistical weight of the upper level n. E_n is the energy of the upper level n.

l.p.	λnm (nm)	Transition	Anm (10^7 s^−1)		En (cm^−1)
1	427.75	5p → 4s	0.0797	3	117,151
2	430.01		0.0377	5	116,999
3	434.51		0.0297	5	118,407
4	518.77	5d → 4p	0.1380	5	123,372
5	603.21		0.1400	9	122,036