Sequential and direct two-photon double ionization (DI) of D2 molecule is studied experimentally and theoretically at a photon energy of 38.8 eV. Experimental and theoretical kinetic energy releases of D++D+fragments, consisting of the contributions of sequential DI via the D2+(1sσg) state and direct DI via a virtual state, agree well with each other.
"Sequential and Direct Two-Photon Double Ionization of D2 at Flash," Journal of Physics: Conference Series, vol. 194, no. 3, Institute of Physics - IOP Publishing, Jan 2009.
The definitive version is available at https://doi.org/10.1088/1742-6596/194/3/032057
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