Abbreviated Journal Title
Phys. Rev. A
AB-INITIO CHARACTERIZATION; KOHN VARIATIONAL METHOD; EXCITED-STATES; NEGATIVE-IONS; ASTRONOMICAL IDENTIFICATION; CIRCUMSTELLAR ENVELOPES; PHOTOELECTRON-SPECTRA; INTERSTELLAR CLOUDS; ELECTRONIC STATES; C4H; Optics; Physics, Atomic, Molecular & Chemical
We report theoretical results of the low-energy photodetachment cross sections of the C2H-, C4H-, and C6H- hydrocarbon-chain anions. The complex Kohn variational technique is used to calculate molecular-frame transition dipole moments from the anion ground state to a photoelectron in the continuum of the neutral radical. We employ the Franck-Condon approximation and include interchannel electronic coupling to determine the low-energy photodetachment cross sections and asymmetry parameters. We discuss the behavior of the cross section, especially near thresholds, and describe the role of electronic resonances and excited channels. The theoretical results reproduce the main characteristics of recent measurements of absolute photodetachment cross sections.
Physical Review A
Douguet, Nicolas; Kokoouline, Viatcheslav; and Orel, Ann E., "Photodetachment cross sections of the C2nH- (n=1-3) hydrocarbon-chain anions" (2014). Faculty Bibliography 2010s. 5271.