Ionization and high-order harmonic generation from highly vibrational

We point out the dependence of ionization probability and the high-order harmonics intensity on vibration levels of H 2 + . The ionization probability shows a maximum value at a certain level. Moreover, saturation in the high-order harmonic generation (HHG) spectra of a vibrating H 2 + is also found from numerically solving the time-dependent Schrِdinger equation. With some low vibration levels, the intensity of the HHG increases with respect to vibration levels but with higher ones, the harmonics intensity demonstrates a saturated value. The internuclear separation is based on to explain obtained results.