TY  - JOUR
AB  - Very highly excited p states of Cs with principal quantum numbers 30 < or = Eta < or = 85 were produced by one-step photoexcitation with frequency-doubled light from a flash-lamp-pumped dye laser. Field ionization was employed for selective detection. Ionization occurs at field strengths E > or = Emin with a sharp threshold. The relation Emin(n*) varies as (n*)-4 was verified over a wide range. Two-photon excitation to a very high state via a virtual intermediate state leads to immediate ionization of most of the excited atoms; in this case the ion signal as a function of the light intensity I is not proportional to Ik, k > or = 2, whereas a direct two-photon transition into the continuum yields proportionality with Ito the power of 2.
DA  - 1976
DO  - 10.1088/0022-3700/9/7/002
LA  - eng
IS  - 7
M2  - L173
PY  - 1976
SN  - 0022-3700
SP  - L173-L176
T2  - J.Phys. B
TI  - One- and two-photon production of very highly excited states of caesium
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-17757796
Y2  - 2024-11-24T19:21:09
ER  -