Actions for K-shell ionization and double-ionization of Au atoms with 1.33 MeV photons [electronic resource].

Email RIS file
Bookmark
Report an Issue

K-shell ionization and double-ionization of Au atoms with 1.33 MeV photons [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2000.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
5 pages : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
At relativistic energies, the cross section for the atomic photoelectric effect drops off as does the cross section for liberating any bound electron through Compton scattering. However, when the photon energy exceeds twice the rest mass of the electron, ionization may proceed via electron-positron pair creation. We used 1.33 MeV photons impinging on Au thin foils to study double K-shell ionization and vacuum-assisted photoionization. The preliminary results yield a ratio of vacuum-assisted photoionization and pair creation of 2x10⁻³, a value that is substantially higher than the ratio of photo double ionization to single photoionization that is found to be 0.5-1x10⁻⁴. Because of the difficulties and large error bars associated with the small cross sections additional measurements are needed to minimize systematic errors.
Report Numbers
E 1.99:lbnl--45930
lbnl--45930
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/15/2000.
"lbnl--45930"
X-ray and inner-shell processes: 18th International Conference, Chicago, IL (US), 08/23/1999--08/27/1999.
Sorensen, A.H.; Dauvergne, D.; Belkacem, A.; Feinberg, B.; Ionescu, D.; Maddi, J.
Funding Information
AC03-76SF00098
402901
View MARC record | catkey: 14669286