Continuum state spectroscopy: A high resolution ion imaging study of IBr photolysis in the wavelength range 440–685 nm

Content Provider	Semantic Scholar
Author	Wrede, Eckart Laubach, Stefan Schulenburg, Sonja Brown, Alex Wouters, Eloy R. Orr-Ewing, Andrew J. Ashfold, Michael N. R.
Copyright Year	2001
Abstract	The photodissociation of jet-cooled IBr molecules has been investigated at numerous excitation wavelengths in the range 440–685 nm using a state-of-art ion imaging spectrometer operating under optimal conditions for velocity mapping. Image analysis provides precise threshold energies for the ground, I(2P3/2)+Br(2P3/2), and first excited [I(2P3/2)+Br(2P1/2)] dissociation asymptotes, the electronic branching into these two active product channels, and the recoil anisotropy of each set of products, as a function of excitation wavelength. Such experimental data have allowed mapping of the partial cross-sections for parallel (i.e., ΔΩ=0) and perpendicular (i.e., ΔΩ=±1) absorptions and thus deconvolution of the separately measured (room temperature) parent absorption spectrum into contributions associated with excitation to the A 3Π(1), B 3Π(0+) and 1Π(1) excited states of IBr. Such analyses of the continuous absorption spectrum of IBr, taken together with previous spectroscopic data for the bound levels suppor.
Starting Page	2629
Ending Page	2646
Page Count	18
File Format	PDF HTM / HTML
DOI	10.1063/1.1337049
Volume Number	114
Alternate Webpage(s)	http://www.chem.ualberta.ca/~abrown/cv/JCP02629.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article