State-selective dissociation dynamics of an oxygen molecular ion studied with single-harmonic pump and infrared-probe pulses
Journal Article
·
· Physical Review A
- Kansas State Univ., Manhattan, KS (United States); DOE/OSTI
- Univ. Frankfurt am Main (Germany). Inst. fur Kernphysik
- Kansas State Univ., Manhattan, KS (United States)
- Kansas State Univ., Manhattan, KS (United States); Huazhong Univ. of Science and Technology, Wuhan (China)
Laser-induced dissociation of a photoionized oxygen molecule is studied employing an extreme-ultraviolet-pump–near-infrared-probe (EUV-NIR pump-probe) technique. A combination of a narrow-band 11th harmonic pump centered at 17.3 eV and a moderate-intensity NIR probe restricts the dissociation dynamics to the pair of low-lying cationic states, and . The measured kinetic energies of the fragments reveal contributions from one-, two-, and three-photon dissociation pathways ( , , and ) involving these two states. While the yields of the two- and three-photon channels initially rise and then decrease as a function of EUV-NIR delay, the yield of the single-photon pathway rises slower but keeps increasing over the whole delay range studied. Furthermore, this behavior reflects the evolving probability density of the ionic nuclear wave packet at the internuclear distances, where it can undergo resonant and transitions from the to the state of .
- Research Organization:
- Kansas State Univ., Manhattan, KS (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- FG02-86ER13491
- OSTI ID:
- 1540685
- Alternate ID(s):
- OSTI ID: 1461232
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 98; ISSN 2469-9926
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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