Series parallel extensions of plane graphs to dual-eulerian graphs

Detection of thePe1Series of Doubly Excited Helium States belowN=2via the Stark Effect

“…The calculated oscillator strengths of the perturbed even states were multiplied by the corresponding fluorescence decay branching rates of the unperturbed states [26] to estimate their primary VUV yield for the perpendicular geometry, Fig. 4.…”

“…However, the VUV yield mainly originates from the two A 0 states [26] due to their much larger fluorescence to autoionization branching ratio. The presence of both peaks explains the width of the spectral features in Figs.…”