X-Ray Emission from Highly Charged Ions Colliding with a Relativistic Electron Beam in the SuperEBIT Electron Beam Ion Trap

Journal Article · Fri Jan 24 00:00:00 EST 2003 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1536369· OSTI ID:20636446

Beiersdorfer, P; Beck, B; Becker, J A; Reed, K J ^[1]; Lepson, J K ^[2]

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1. Lawrence Livermore National Laboratory, Livermore, CA (United States)
2. University of California, Berkeley, CA (United States)

The high-energy electron beam ion trap SuperEBIT at the Lawrence Livermore National Laboratory allows the study of the x-ray emission from highly charged ions interacting with electrons with energy in excess of 200 keV. Radiation from ions as highly charged as Cf96+ has been produced this way. The facility is being used to investigate the contributions from quantum electrodynamics in heavy ions. Here the focus is lithiumlike ions, especially U89+, which provide the opportunity for the most accurate test of QED in highly charged ions. We have also used the facility to measure the degree of x-ray line polarization as a function of the energy of the electron collision energy. For example, we have studied the linear polarization of the K-shell emission lines of Fe24+ for electron-impact energies high as 120 keV. A new area of research is the investigation of nuclear excitation by electronic transitions. This is the inverse process of internal conversion, where an atomic x ray is absorbed by the nucleus resulting in an excited nuclear state. We are planning to study this process in 189Os using 217 keV atomic x rays generated in the interaction with a 196 keV electron beam.

• OSTI ID: 20636446
• Journal Information: AIP Conference Proceedings, Vol. 652, Issue 1; Conference: 19. International conference on X-ray and inner-shell processes, Rome (Italy), 24-28 Jun 2002; Other Information: DOI: 10.1063/1.1536369; (c) 2003 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON BEAMS
ELECTRON-ATOM COLLISIONS
ELECTRONS
EMISSION SPECTRA
EXCITATION
HEAVY IONS
INTERNAL CONVERSION
K SHELL
KEV RANGE
LAWRENCE LIVERMORE NATIONAL LABORATORY
OSMIUM 189
PHOTON EMISSION
POLARIZATION
QUANTUM ELECTRODYNAMICS
RELATIVISTIC RANGE
TRAPPING
TRAPS
X RADIATION
X-RAY SPECTRA