Rm. Potvliege et Phg. Smith, ADIABATIC STABILIZATION OF EXCITED-STATES OF H IN AN INTENSE LINEARLYPOLARIZED LASER FIELD, Physical review. A, 48(1), 1993, pp. 180000046-180000049
The lifetime of atomic hydrogen exposed to an intense ''high-frequency
'' linearly polarized laser field has been calculated, in a Sturmian-F
loquet approach, for the case where the atom is initially in an excite
d state with m = 3, 4, 5, or 6, l = m, m + 1, or m + 2, and n less-tha
n-or-equal-to 8, for several wavelengths between 455 and 1064 nm. In t
his range of parameters, the intensity at which the lifetime of the at
om reaches a minimum value is given in good approximation by a simple
''empirical' law. The lifetime is longer than that predicted by previo
us approximate Floquet calculations, and its minimum occurs at a small
er intensity. Results for higher-lying Rydberg states are also present
ed.