STATE-SELECTED AND ORIENTED MOLECULES - ROTATIONALLY-RESOLVED PHOTOELECTRON-SPECTROSCOPY AND DICHROISM IN IONIZATION OF SYMMETRICAL TOPS

Citation
N. Chandra et M. Chakraborty, STATE-SELECTED AND ORIENTED MOLECULES - ROTATIONALLY-RESOLVED PHOTOELECTRON-SPECTROSCOPY AND DICHROISM IN IONIZATION OF SYMMETRICAL TOPS, Zeitschrift fur Physik. D, Atoms, molecules and clusters, 41(1), 1997, pp. 43-55
Citations number
58
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
ISSN journal
01787683
Volume
41
Issue
1
Year of publication
1997
Pages
43 - 55
Database
ISI
SICI code
0178-7683(1997)41:1<43:SAOM-R>2.0.ZU;2-P
Abstract
This paper developes a theoretical framework for one-photon, electric dipole ionization of molecules, prepared in a single \JKM] rotational state of their ground electronic motion using a hexapole electrostatic field followed by a weak and homogeneous orienting electric field E, by taking also the \J'K'M'] eigenstate of the residual photoion into a ccount. This theory has been used to study photoionization in a generi c C-3v molecule by the linearly as well as circularly polarized light. Integrated and differential photocurrents plus circular dichroism, ob tained from a model calculation, for ionization in two different exper imental configurations in 13 alpha(iota)(2) orbital of a state selecte d and oriented CH3I are discussed. These results show, among other thi ngs, that somewhat different propensity rules for \JKM] --> \J'K'M'] t ransitions are obeyed in different experimental geometries. Also, dich roic effect exists in the photoelectron angular distribution when circ ularly polarized light is incident perpendicular to E.