High-energy electron impact study on autoionizing region in helium by detection of ejected electrons

- We recorded ejected electron spectra in autoionzing region of helium with high-energy resolution.
- At the angle of 40° optically forbidden states almost vanish and resonances dominate the spectrum.
- A new resonance at 64.18 eV has been found at the angle of 40° and the electron impact energy of 505 eV.