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