Abstract
We present an experimental and theoretical study of photoelectron momentum distributions for nitric oxide (NO) and carbon monoxide (CO) molecules generated by intense linearly polarized laser pulses. It is shown that the measured distributions along the outermost backward rescattering caustic are well reproduced by calculations based on the factorization formula with the analytical returning photoelectron wave packet (RWP) recently derived from the adiabatic theory [T. Morishita and O. I. Tolstikhin, Phys. Rev. A 96, 053416 (2017)]. The good agreement between the experimental and theoretical results confirms the validity of the theory for molecular targets. We discuss the dependence of the RWP on the scattering angle not taken into account in previous studies. We also discuss its dependence on the orientation of a molecule with respect to the laser field, which reveals a role of depletion of the initial state for the systems and pulses considered.
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