Internet Archive Scholar

Measurement of Vacuum-Assisted Photoionization at 1 GeV for Au and Ag Targets

D. Dauvergne, A. Belkacem, F. Barrué, J. P. Bocquet, M. Chevallier, B. Feinberg, R. Kirsch, J. C. Poizat, C. Ray, D. Rebreyend
2003 Physical Review Letters  

Preserved Fulltext

fulltext thumbnail
Web Archive Capture PDF (510.8 kB)
https://web.archive.org/web/20170922003823/http://hal.in2p3.fr/in2p3-00013668/document

A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL. The file type is application/pdf.

We report a measurement of photon impact ionization of K and L-shell of Au and Ag targets in the 1-GeV energy range. We show that the cross section is dominated by a contribution from a new channel called vacuum-assisted photoionization. In this process the energymomentum balance associated with the removal of the inner-shell electron is obtained by a conversion of the high-energy photon into an electron-positron pair. This measurement confirms the theoretical prediction that vacuum-assisted
more » ... toionization is the most probable ionization mechanism at very high energies.
doi:10.1103/physrevlett.90.153002 pmid:12732031 fatcat:q2w6vo3kxnc45nimicl7qdeye4
Citation

D. Dauvergne, A. Belkacem, F. Barrué, J. P. Bocquet, M. Chevallier, B. Feinberg, R. Kirsch, J. C. Poizat, C. Ray, D. Rebreyend. "Measurement of Vacuum-Assisted Photoionization at 1 GeV for Au and Ag Targets." Physical Review Letters 90.15 (2003)