Ultraviolet photodissociation of iodine monochloride (ICl) at 235, 250, and 265 nm

N Diamantopoulou; A Kartakoulis; P Glodic; Theofanis N Kitsopoulos; Peter C Samartzis

doi:10.1063/1.3592783

Ultraviolet photodissociation of iodine monochloride (ICl) at 235, 250, and 265 nm

J Chem Phys. 2011 May 21;134(19):194314. doi: 10.1063/1.3592783.

Authors

N Diamantopoulou¹, A Kartakoulis, P Glodic, Theofanis N Kitsopoulos, Peter C Samartzis

Affiliation

¹ Institute of Electronic Structure and Laser, Foundation of Research and Technology Hellas, Iraklion 71110, Greece.

PMID: 21599066
DOI: 10.1063/1.3592783

Abstract

ICl photolysis in the ultraviolet region of the spectrum (235-265 nm) is studied using the Slice Imaging technique. The Cl∗((2)P(1/2))/Cl((2)P(3/2)) and the I∗((2)P(1/2))/I((2)P(3/2)) branching ratio between the I((2)P(3/2)) + Cl((2)P(3/2))∕Cl∗((2)P(1/2)) and I∗((2)P(1/2)) + Cl((2)P(3∕/2))∕Cl∗((2)P(1/2)) channels is extracted from the respective iodine and chlorine photofragment images. We find that ground state chlorine atoms (Cl((2)P(3/2))) are formed nearly exclusively with excited state iodine atoms (I∗((2)P(1/2))), while excited spin-orbit chlorine atoms (Cl∗((2)P(1/2))) are concurrently produced only with ground state iodine atoms (I((2)P(3/2))). We conclude that photolysis of ICl in this UV region is a relatively "clean" source of spin-orbit excited chlorine atoms that can be used in crossed molecular beam experiments.