Dynamic modification of the fragmentation of COq+ excited states generated with high-order harmonics
Author(s)
Cao, W
De, S
Singh, KP
Chen, S
Schoeffler, MS
Alnaser, AS
Bocharova, IA
Laurent, G
Ray, D
Zherebtsov, S
Kling, MF
Ben-Itzhak, I
Litvinyuk, IV
Belkacem, A
Osipov, T
Rescigno, T
Cocke, CL
Griffith University Author(s)
Year published
2010
Metadata
Show full item recordAbstract
The dynamic process of fragmentation of CO^q+ excited states is investigated using a pump-probe approach. EUV radiation (32-48 eV) generated by high-order harmonics was used to ionize and excite CO molecules and a time-delayed infrared (IR) pulse (800 nm) was used to influence the evolution of the dissociating multichannel wave packet. Two groups of states, separable experimentally by their kinetic-energy release (KER), are populated by the EUV and lead to C+-O+ fragmentation: direct double ionization of the neutral molecule and fragmentation of the cation leading to C+-O*, followed by autoionization of O*. The IR pulse was ...
View more >The dynamic process of fragmentation of CO^q+ excited states is investigated using a pump-probe approach. EUV radiation (32-48 eV) generated by high-order harmonics was used to ionize and excite CO molecules and a time-delayed infrared (IR) pulse (800 nm) was used to influence the evolution of the dissociating multichannel wave packet. Two groups of states, separable experimentally by their kinetic-energy release (KER), are populated by the EUV and lead to C+-O+ fragmentation: direct double ionization of the neutral molecule and fragmentation of the cation leading to C+-O*, followed by autoionization of O*. The IR pulse was found to modify the KER of the latter group in a delay-dependent way which is explained with a model calculation.
View less >
View more >The dynamic process of fragmentation of CO^q+ excited states is investigated using a pump-probe approach. EUV radiation (32-48 eV) generated by high-order harmonics was used to ionize and excite CO molecules and a time-delayed infrared (IR) pulse (800 nm) was used to influence the evolution of the dissociating multichannel wave packet. Two groups of states, separable experimentally by their kinetic-energy release (KER), are populated by the EUV and lead to C+-O+ fragmentation: direct double ionization of the neutral molecule and fragmentation of the cation leading to C+-O*, followed by autoionization of O*. The IR pulse was found to modify the KER of the latter group in a delay-dependent way which is explained with a model calculation.
View less >
Journal Title
Physical Review A (Atomic, Molecular and Optical Physics)
Volume
82
Issue
4
Subject
Mathematical sciences
Physical sciences
Atomic and molecular physics
Chemical sciences