Photoelectron and Auger-electron angular distributions of fixed-in-space CO2

F. P. Sturm; M. Schöffler; S. Lee; T. Osipov; N. Neumann; H. K. Kim; S. Kirschner; B. Rudek; J. B. Williams; J. D. Daughhetee; C. L. Cocke; K. Ueda; A. L. Landers; Th Weber; M. H. Prior; A. Belkacem; R. Dörner

doi:10.1103/PhysRevA.80.032506

Photoelectron and Auger-electron angular distributions of fixed-in-space CO2

F. P. Sturm, M. Schöffler, S. Lee, T. Osipov, N. Neumann, H. K. Kim, S. Kirschner, B. Rudek, J. B. Williams, J. D. Daughhetee, C. L. Cocke, K. Ueda, A. L. Landers, Th Weber, M. H. Prior, A. Belkacem, R. Dörner

Division of Measurements

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19 Citations (Scopus)

Abstract

We report a kinematically complete experiment of carbon 1s photoionization of CO2 including Auger decay and fragmentation. By measuring in coincidence of CO2 C (1s) photoelectrons and ion fragments using synchrotron light at several energies above the C (1s) threshold, we determine photoelectron angular distributions as well as Auger-electron angular distributions with full solid angle in the molecular fixed frame. We confirm recent unexpected results showing an asymmetry of the photoelectron angular distribution along the molecular axis after ionization of the C (1s) orbital. Our high statistics and high resolution measurement unveils asymmetric features in the photoelectron angular distribution which change as a function of the kinetic energy release. This finding provides strong evidence that varying C-O bondlengths are the main cause for these asymmetries. The Auger-electron angular distributions do not show strong correlation with the photoelectrons.

Original language	English
Article number	032506
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.80.032506
Publication status	Published - 2009 Sep 10

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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Sturm, F. P., Schöffler, M., Lee, S., Osipov, T., Neumann, N., Kim, H. K., Kirschner, S., Rudek, B., Williams, J. B., Daughhetee, J. D., Cocke, C. L., Ueda, K., Landers, A. L., Weber, T., Prior, M. H., Belkacem, A., & Dörner, R. (2009). Photoelectron and Auger-electron angular distributions of fixed-in-space CO2. Physical Review A - Atomic, Molecular, and Optical Physics, 80(3), [032506]. https://doi.org/10.1103/PhysRevA.80.032506

Photoelectron and Auger-electron angular distributions of fixed-in-space CO2. / Sturm, F. P.; Schöffler, M.; Lee, S.; Osipov, T.; Neumann, N.; Kim, H. K.; Kirschner, S.; Rudek, B.; Williams, J. B.; Daughhetee, J. D.; Cocke, C. L.; Ueda, K.; Landers, A. L.; Weber, Th; Prior, M. H.; Belkacem, A.; Dörner, R.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 80, No. 3, 032506, 10.09.2009.

Research output: Contribution to journal › Article › peer-review

Sturm, FP, Schöffler, M, Lee, S, Osipov, T, Neumann, N, Kim, HK, Kirschner, S, Rudek, B, Williams, JB, Daughhetee, JD, Cocke, CL, Ueda, K, Landers, AL, Weber, T, Prior, MH, Belkacem, A & Dörner, R 2009, 'Photoelectron and Auger-electron angular distributions of fixed-in-space CO2', Physical Review A - Atomic, Molecular, and Optical Physics, vol. 80, no. 3, 032506. https://doi.org/10.1103/PhysRevA.80.032506

Sturm, F. P. ; Schöffler, M. ; Lee, S. ; Osipov, T. ; Neumann, N. ; Kim, H. K. ; Kirschner, S. ; Rudek, B. ; Williams, J. B. ; Daughhetee, J. D. ; Cocke, C. L. ; Ueda, K. ; Landers, A. L. ; Weber, Th ; Prior, M. H. ; Belkacem, A. ; Dörner, R. / Photoelectron and Auger-electron angular distributions of fixed-in-space CO2. In: Physical Review A - Atomic, Molecular, and Optical Physics. 2009 ; Vol. 80, No. 3.

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abstract = "We report a kinematically complete experiment of carbon 1s photoionization of CO2 including Auger decay and fragmentation. By measuring in coincidence of CO2 C (1s) photoelectrons and ion fragments using synchrotron light at several energies above the C (1s) threshold, we determine photoelectron angular distributions as well as Auger-electron angular distributions with full solid angle in the molecular fixed frame. We confirm recent unexpected results showing an asymmetry of the photoelectron angular distribution along the molecular axis after ionization of the C (1s) orbital. Our high statistics and high resolution measurement unveils asymmetric features in the photoelectron angular distribution which change as a function of the kinetic energy release. This finding provides strong evidence that varying C-O bondlengths are the main cause for these asymmetries. The Auger-electron angular distributions do not show strong correlation with the photoelectrons.",

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AU - Kim, H. K.

AU - Kirschner, S.

AU - Rudek, B.

AU - Williams, J. B.

AU - Daughhetee, J. D.

AU - Cocke, C. L.

AU - Ueda, K.

AU - Landers, A. L.

AU - Weber, Th

AU - Prior, M. H.

AU - Belkacem, A.

AU - Dörner, R.

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AB - We report a kinematically complete experiment of carbon 1s photoionization of CO2 including Auger decay and fragmentation. By measuring in coincidence of CO2 C (1s) photoelectrons and ion fragments using synchrotron light at several energies above the C (1s) threshold, we determine photoelectron angular distributions as well as Auger-electron angular distributions with full solid angle in the molecular fixed frame. We confirm recent unexpected results showing an asymmetry of the photoelectron angular distribution along the molecular axis after ionization of the C (1s) orbital. Our high statistics and high resolution measurement unveils asymmetric features in the photoelectron angular distribution which change as a function of the kinetic energy release. This finding provides strong evidence that varying C-O bondlengths are the main cause for these asymmetries. The Auger-electron angular distributions do not show strong correlation with the photoelectrons.

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Photoelectron and Auger-electron angular distributions of fixed-in-space CO2

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