A STUDY OF THE ABSOLUTE PHOTOABSORPTION, PHOTOIONIZATION AND PHOTODISSOCIATION CROSS-SECTIONS AND THE PHOTOIONIZATION QUANTUM EFFICIENCY OFOXYGEN FROM THE IONIZATION THRESHOLD TO 490 ANGSTROM

Citation
Dmp. Holland et al., A STUDY OF THE ABSOLUTE PHOTOABSORPTION, PHOTOIONIZATION AND PHOTODISSOCIATION CROSS-SECTIONS AND THE PHOTOIONIZATION QUANTUM EFFICIENCY OFOXYGEN FROM THE IONIZATION THRESHOLD TO 490 ANGSTROM, Chemical physics, 173(2), 1993, pp. 315-331
Citations number
76
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
03010104
Volume
173
Issue
2
Year of publication
1993
Pages
315 - 331
Database
ISI
SICI code
0301-0104(1993)173:2<315:ASOTAP>2.0.ZU;2-B
Abstract
The absolute photoabsorption, photoionization and photodissociation cr oss sections and the photoionization quantum efficiency of oxygen have been measured using a double ion chamber and monochromated synchrotro n radiation. In addition to structure associated with well established Rydberg series, some new features have been observed which are interp reted in terms of transitions into Rydberg states converging onto the 3 2PI(u) ionization threshold. The photoionization quantum efficiency measurements indicate that the decay of Rydberg states by dissociation into neutral products is a significant de-excitation route, particula rly for the low vibrational members of the H 3PI(u). state. A sum rule analysis has been carried out by combining the present absolute photo absorption measurements with similar data covering the remaining wavel ength regions.