Abstract
We analyze the influence of ponderomotive and Stark shifts on the barrier suppression transition rate for noble and alkali atoms for a low-frequency linearly-polarized laser field. We consider three approaches to the barrier suppression ionization (BSI) rate: through a critical field, an ion charge, and the Airy function. We show that ponderomotive and Stark shifts affect the rate differently in these three approaches. Generally, the rate curve of K is more strongly lowered than the one of Ar.
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