Resonance Potentials and Low-Voltage Arcs for Metals of the Second Group of the Periodic Table*

Critical potentials of mercury with a Franck Hertz tube

“…Thereafter, the remaining structure becomes broader until ultimately a stable form is attained at g ∼ = +1.5. This type of curve, shown in figure 6, is quite similar to the plots obtained in [5,6].…”

“…The excitation curve of figure 2 is considerably more complex than the original curves of Einsporn [6] and Mohler et al [5]. It differs, too, from the modern curve of Liu [7].…”

“…(1) Mohler et al [5] in 1920 at NBS, (2) Einsporn [6], a student of James Franck, in 1921 in Berlin, and (3) Liu [7] in 1987 in China.…”

“…(1) Mohler et al [5] in 1920 at NBS, (2) Einsporn [6], a student of James Franck, in 1921 in Berlin, and (3) Liu [7] in 1987 in China. These plots were explained by matching the peaks with suitable combinations of two or three of the lowest critical potentials of mercury, multiple inelastic scattering being favoured at the pressure employed.…”

“…The coarser curves of [5][6][7] are spectra obtained under conditions that privilege the display of the spectrum excited in the high-potential plasma. The consistency of these data with the series in table 1 is established in sections 5.2 and 6.…”