Polarization measurements of the Lyman-(alpha)1 x-ray emission lines of hydrogenlike Ar17+ and Fe25+ at high electron impact energies

Journal Article · Sun Jan 29 00:00:00 EST 2006 · Physical Review A, vol. 74, n/a, February 1, 2006, pp. 022713

OSTI ID:900126

Robbins, D L; Beiersdorfer, P; Faenov, A Y; Pikuz, T A; Thorn, D B; Chen, H; Reed, K J; Smith, A J; Brown, G V; Kelley, R L; Kilbouren, C A; Porter, F S

We have measured the polarization of the 2p{sub 3/2} {yields} 1s{sub 1/2} Lyman-{alpha}{sub 1} x-ray line of hydrogenlike Ar{sup 17+} and Fe{sup 25+} at electron impact energies ranging from 7 to 25 threshold units. The highly charged argon and iron ions were produced using the Lawrence Livermore National Laboratory SuperEBIT electron beam ion trap. A combination of two crystal spectrometers and a microcalorimeter were used to record the Lyman-{alpha} x-ray emission of Ar{sup 17+} and Fe{sup 25+} and to infer the polarization of the Lyman-{alpha}{sub 1} line. Our results show a systematic discrepancy with the predictions of distorted-wave calculations.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 900126
• Report Number(s): UCRL-JRNL-218600; TRN: US0702168
• Journal Information: Physical Review A, vol. 74, n/a, February 1, 2006, pp. 022713, Journal Name: Physical Review A, vol. 74, n/a, February 1, 2006, pp. 022713
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ELECTRON BEAMS
ELECTRONS
IRON IONS
LAWRENCE LIVERMORE NATIONAL LABORATORY
POLARIZATION
SPECTROMETERS