Weak-field asymptotic theory of tunneling ionization: benchmark analytical results for two-electron atoms

作者：Trinh Vinh H^*; Tolstikhin Oleg I; Morishita Toru

来源：Journal of Physics B: Atomic, Molecular and Optical Physics , 2015, 48(6): 061003.

DOI：10.1088/0953-4075/48/6/061003

• tunneling ionization
• weak field asymptotic theory
• many-electron effects

The recently developed many-electron weak-field asymptotic theory of tunneling ionization of atoms and molecules in an external static electric field (Tolstikhin et al 2014, Phys. Rev. A 89, 013421) is extended to the first-order terms in the asymptotic expansion in field. To highlight the results, here we present a simple analytical formula giving the rate of tunneling ionization of two-electron atoms H-and He. Comparison with fully-correlated ab initio calculations available for these systems shows that the first-order theory works quantitatively in a wide range of fields up to the onset of over-the-barrier ionization and hence is expected to find numerous applications in strong-field physics.

• 出版日期2015-3-28