title: Photoelectron imaging of I2- at 5.826 eV.
abstract: We report the anion photoelectron spectrum of I2- taken at 5.826 eV detachment energy using velocity mapped imaging. The photoelectron spectrum exhibits bands resulting from transitions to the bound regions of the X 1Sigmag+(0g+), A' 3Piu(2u), A 3Piu(1u), and B 3Piu(0u+) electronic states as well as bands resulting from transitions to the repulsive regions of several I2 electronic states: the B' 3Piu(0u-), B" 1Piu(1u), 3Pig(2g), a 3Pig(1g), 3Pig(0g-), and C 3Sigmau+(1u) states. We simulate the photoelectron spectrum using literature parameters for the I2- and I2 ground and excited states. The photoelectron spectrum includes bands resulting from transitions to several high-lying excited states of I2 that have not been seen experimentally: 3Pig(0g-), 1Pig3(1g), 1 3Sigmag-3(0g+), and the 1Sigmag-3(0u-) states of I2. Finally, the photoelectron spectrum at 5.826 eV allows for the correction of a previous misassignment for the vertical detachment energy of the I2 B 3Piu(0u+) state.
authors.affiliation: Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-1460 and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Bradley F
authors.initials: BF
authors.lastname: Parsons
authors.forename: Sean M
authors.initials: SM
authors.lastname: Sheehan
authors.forename: Kathryn E
authors.initials: KE
authors.lastname: Kautzman
authors.forename: Terry A
authors.initials: TA
authors.lastname: Yen
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Neumark