Ratio of Cross Sections for Double to Single Ionization of He by 85–400 eV Photons

R. Dörner; T. Vogt; V. Mergel; H. Khemliche; S. Kravis; C. L. Cocke; J. Ullrich; M. Unverzagt; L. Spielberger; M. Damrau; O. Jagutzki; I. Ali; B. Weaver; K. Ullmann; C. C. Hsu; M. Jung; E. P. Kanter; B. Sonntag; M. H. Prior; E. Rotenberg; J. Denlinger; T. Warwick; S. T. Manson; H. Schmidt-Böcking

doi:10.1103/PhysRevLett.76.2654

Ratio of Cross Sections for Double to Single Ionization of He by 85–400 eV Photons

R. Dörner, T. Vogt, V. Mergel, H. Khemliche, S. Kravis, C. L. Cocke, J. Ullrich, M. Unverzagt, L. Spielberger, M. Damrau, O. Jagutzki, I. Ali, B. Weaver, K. Ullmann, C. C. Hsu, M. Jung, E. P. Kanter, B. Sonntag, M. H. Prior, E. Rotenberg, J. Denlinger, T. Warwick, S. T. Manson, and H. Schmidt-Böcking

Phys. Rev. Lett. 76, 2654 – Published 8 April 1996

Abstract

The ratio of double to single ionization of He by 85–400 eV photons has been measured using cold target recoil ion momentum spectroscopy. This technique allows the elimination of all possible systematic errors discussed so far in the literature on this subject. We find the ratio in this energy range to be about 25% lower than previously assumed.

Received 3 November 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.2654

Authors & Affiliations

R. Dörner^1,2, T. Vogt², V. Mergel², H. Khemliche³, S. Kravis¹, C. L. Cocke¹, J. Ullrich⁴, M. Unverzagt², L. Spielberger², M. Damrau², O. Jagutzki², I. Ali², B. Weaver², K. Ullmann², C. C. Hsu⁶, M. Jung⁵, E. P. Kanter⁵, B. Sonntag⁷, M. H. Prior³, E. Rotenberg⁸, J. Denlinger⁹, T. Warwick³, S. T. Manson¹⁰, and H. Schmidt-Böcking²

¹Department of Physics, Kansas State University, Manhattan, Kansas 66506
²Institut für Kernphysik, Universität Frankfurt, August Euler Str. 6, D60486 Frankfurt, Germany
³Lawrence Berkeley National Labortory, Berkeley, California 94720
⁴Gesellschaft für Schwerionen Forschung, D64291 Darmstadt, Germany
⁵Argonne National Laboratory, Argonne, Illinois 60439
⁶National Tsing Hua University, Taiwan
⁷Hasylab am DESY, D22603 Hamburg, Germany
⁸Department of Physics, University of Oregon, Eugene, Oregon 97403
⁹Department of Physics, University of Wisconsin, Milwaukee, Wisconsin 53211
¹⁰Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303