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Czasch A, Schöffler M, Hattass M, et al. Partial photoionization cross sections and angular distributions for double excitation of helium up to the N = 13 threshold. Phys Rev Lett. 2005;95(24):243003doi: 10.1103/PhysRevLett.95.243003.
Czasch, A., Schöffler, M., Hattass, M., Schössler, S., Jahnke, T., Weber, T., Staudte, A., Titze, J., Wimmer, C., Kammer, S., Weckenbrock, M., Voss, S., Grisenti, R. E., Jagutzki, O., Schmidt, L. P., Schmidt-Böcking, H., Dörner, R., Rost, J. M., Schneider, T., Liu, C. N., Bray, I., Kheifets, A. S., & Bartschat, K. (2005). Partial photoionization cross sections and angular distributions for double excitation of helium up to the N = 13 threshold. Physical review letters, 95(24), 243003. https://doi.org/10.1103/PhysRevLett.95.243003
Czasch, A, et al. "Partial photoionization cross sections and angular distributions for double excitation of helium up to the N = 13 threshold." Physical review letters vol. 95,24 (2005): 243003. doi: https://doi.org/10.1103/PhysRevLett.95.243003
Czasch A, Schöffler M, Hattass M, Schössler S, Jahnke T, Weber T, Staudte A, Titze J, Wimmer C, Kammer S, Weckenbrock M, Voss S, Grisenti RE, Jagutzki O, Schmidt LP, Schmidt-Böcking H, Dörner R, Rost JM, Schneider T, Liu CN, Bray I, Kheifets AS, Bartschat K. Partial photoionization cross sections and angular distributions for double excitation of helium up to the N = 13 threshold. Phys Rev Lett. 2005 Dec 09;95(24):243003. doi: 10.1103/PhysRevLett.95.243003. Epub 2005 Dec 08. PMID: 16384373.
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Phys Rev Lett. 2005 Dec 09;95(24):243003. doi: 10.1103/PhysRevLett.95.243003. Epub 2005 Dec 08.

Partial photoionization cross sections and angular distributions for double excitation of helium up to the N = 13 threshold.

Physical review letters

A Czasch, M Schöffler, M Hattass, S Schössler, T Jahnke, Th Weber, A Staudte, J Titze, C Wimmer, S Kammer, M Weckenbrock, S Voss, R E Grisenti, O Jagutzki, L Ph H Schmidt, H Schmidt-Böcking, R Dörner, J M Rost, T Schneider, Chien-Nan Liu, I Bray, A S Kheifets, K Bartschat

Affiliations

  1. Institut für Kernphysik, Universität Frankfurt, D-60438 Frankfurt, Germany. [email protected]

PMID: 16384373 DOI: 10.1103/PhysRevLett.95.243003

Abstract

Partial photoionization cross sections sigmaN(Egamma) and photoelectron angular distributions betaN(Egamma) were measured for the final ionic states He+ (N > 4) in the region between the N = 8 and N = 13 thresholds (Egamma > 78.155 eV) using the cold target recoil ion momentum spectroscopy technique (COLTRIMS). Comparison of the experimental data with two independent sets of theoretical predictions reveals disagreement for the branching ratios to the various HeN(+) states. The angular distributions just below the double ionization threshold suggest an excitation process for highly excited N states similar to the Wannier mechanism for double ionization.

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