Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption

Schöffler, M S; Stuck, C; Waitz, M; Trinter, F; Jahnke, T.; Lenz, U; Jones, M; Belkacem, A; Landers, A L; Pindzola, M.S.; Cocke, C L; Colgan, J.; Kheifets, Anatoli; Bray, Igor; Schmidt-Böcking, H; Dorner, R; Weber, Th

Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption

Date

2013

Authors

Schöffler, M S

Stuck, C

Waitz, M

Trinter, F

Jahnke, T.

Lenz, U

Jones, M

Belkacem, A

Landers, A L

Pindzola, M.S.

Publisher

American Physical Society

Abstract

We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique