ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We have measured vibrationally resolved fluorescence from SiF+4(D˜ 2A1) photoions to determine the vibrational branching ratio σ[v=(1,0,0,0)]/σ[v=(0,0,0,0)] in the excitation energy range 22〈hν〈70 eV. The branching ratio shows pronounced enhancements at hν=25 and 45 eV. The deviation from Franck–Condon behavior at higher energy (hν=45 eV) is attributed to a shape resonance and it appears that a shape resonance is also responsible for the lower energy feature (hν=25 eV). However, the present results in this lower energy region conflict with interpretations of previous vibrationally unresolved work. Applications of these results to general problems in polyatomic photoionization are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.462511
