Theoretical investigation of the Freeman resonance in the dissociative ionization of H2+

The dissociative ionization of $H_2^+$ in linearly polarized, 400 nm laser pulses is simulated by solving a three-particle time-dependent Schr\"odinger equation full dimensionality. joint energy spectra (JES) are computed for $\cos^8$ and flat-top envelopes using the surface flux (tSurff) methods. In JES, sharing $n$ photon energies $\omega$ nuclear kinetic release (KER) $E_N$ electronic KER $E_e$ well represented $E_N+E_e=n\omega-U_p+E_0$ pulses, but satisfy $E_N+E_e=n\omega+E_0$ envelope, exposing deviation ponderomotive $U_p$, which has been observed experiments, where $E_0$ ground $H_2^+$. analysis wavefunction electrons protons after pulse presented, we find $U_p$ absorbed Freeman resonances between two excited ungerade states.