FEMTOSECOND STUDY OF MULTIPHOTON IONIZATION PROCESSES IN K-2 AT MODERATE LASER INTENSITIES

被引:41
作者
DEVIVIERIEDLE, R [1 ]
REISCHL, B [1 ]
RUTZ, S [1 ]
SCHREIBER, E [1 ]
机构
[1] FREE UNIV BERLIN, INST PHYS EXPTL, D-14195 BERLIN, GERMANY
关键词
D O I
10.1021/j100046a007
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Femtosecond pump-probe experiments on the potassium dimer are simulated by quantum dynamical calculations and compared with the experimentally found results. At moderate laser intensities three neutral electronic states dominantly participate in the ionization process. The transition mechanism is a pure (1 + 2)-photon pump-probe process. The two-photon ionization process is located at the outer turning point of the wave packet in the A(1) Sigma(u)(+) state of the K-2 molecule. Both the favorable spectroscopic properties and the special molecular dynamics induced by the moderate laser intensities combine to open a Franck-Condon window for ionization via the 2(1) Pi(g), state which allows the selective detection of the vibrations in the A(1) Sigma(u)(+) state.
引用
收藏
页码:16829 / 16834
页数:6
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