Low-energy fine-structure resonances in photoionization of O II

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dc.contributor.authorNahar, Sultana N.
dc.contributor.authorMontenegro, Maximiliano
dc.contributor.authorEissner, Werner
dc.contributor.authorPradhan, Anil K.
dc.date.accessioned2024-01-10T13:14:29Z
dc.date.available2024-01-10T13:14:29Z
dc.date.issued2010
dc.description.abstractResonant features in low-energy photoionization cross sections are reported in coupled-channel calculations for O II including relativistic fine structure. The calculations reveal extensive near-threshold resonant structures in the small energy region between the fine structure levels of the ground state 2p(2)(P-3(0,1,2)) of the residual ion O III. Although the resonances have not yet been observed, they are similar to other experimentally observed features. They are expected to significantly enhance the very-low-temperature dielectronic recombination rates, potentially leading to the resolution of an outstanding nebular abundances anomaly. Higher energy partial and total photoionization cross sections of the ground configuration levels 2p(3)(S-4(3/2)degrees, D-2(3/2,5/2)degrees, P-2(1/2,3/2)degrees) are found to be in agreement with experimental measurements on synchrotron-based photon sources [1-3], thereby identifying the excited O III levels present in the ion beams. These are also the first results from a recently developed version of Breit-Pauli R-matrix (BPRM) codes, with inclusion of two-body magnetic interaction terms. The improved relativistic treatment could be important for other astrophysical applications and for more precise benchmarking of experimental measurements.
dc.description.funderUS National Science Foundation (Astronomy Division)
dc.fechaingreso.objetodigital2024-05-23
dc.format.extent4 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1103/PhysRevA.82.065401
dc.identifier.eissn1094-1622
dc.identifier.issn1050-2947
dc.identifier.urihttps://doi.org/10.1103/PhysRevA.82.065401
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78412
dc.identifier.wosidWOS:000286740900009
dc.information.autorucEducación;Montenegro M ;S/I;1007867
dc.issue.numero6
dc.language.isoen
dc.nota.accesocontenido parcial
dc.publisherAMER PHYSICAL SOC
dc.revistaPHYSICAL REVIEW A
dc.rightsacceso restringido
dc.subjectCROSS-SECTIONS
dc.subjectABSOLUTE
dc.subjectNEBULAE
dc.subjectLINES
dc.subjectIONS
dc.subject.ods14 Life Below Water
dc.subject.odspa14 Vida submarina
dc.titleLow-energy fine-structure resonances in photoionization of O II
dc.typeartículo
dc.volumen82
sipa.codpersvinculados1007867
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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