KOBRA
KOBRA
 Please use this identifier to cite or link to this item: http://nbn-resolving.de/urn:nbn:de:hebis:34-2008092223876

 Titel: Molecular effects on the cross section for pair production and their importance in the evaluation of the total photonuclear cross section of {^16}O in the {\delta-resonance} region Autor(en): Ahrens, J.Gimm, H.Beuermann, T.Rullhusen, P.Schumacher, M.Fricke, BurkhardSepp, Wolf-Dieter Klassifikation (DDC): 530 - Physik (Physics) Issue Date: 1988 Zitierform: In: Nuclear physics / A. Amsterdam : North-Holland Publ. 490 (1988), S. 655 - 666 Zusammenfassung: The screening correction to the coherent pair-production cross section on the oxygen molecule has been calculated using self-consistent relativistic wave functions for the one-center and two-center Coulomb potentials. It is shown that the modification of the wave function due to molecular binding and the interference between contributions from the two atoms have both sizeable effects on the screening correction. The so-obtained coherent pair-production cross section which makes up the largest part of the total atomic cross section was used to evaluate the total nuclear absorption cross section from photon attenuation measurements on liquid oxygen. The result agrees with cross sections for other nuclei if A-scaling is assumed. The molecular effect on the pair cross section amounts to 15 % of the nuclear cross section in the {\delta-resonance} region. URI: urn:nbn:de:hebis:34-2008092223876 ISSN: 0375-9474 Appears in Collections: Publikationen

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