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

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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.

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Robbins, D. L.; Beiersdorfer, P.; Faenov, A. Y.; Pikuz, T. A.; Thorn, D. B.; Chen, H. et al. January 29, 2006.

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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.

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PDF-file: 28 pages; size: 0.2 Mbytes

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  • Journal Name: Physical Review A, vol. 74, n/a, February 1, 2006, pp. 022713

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  • Report No.: UCRL-JRNL-218600
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 900126
  • Archival Resource Key: ark:/67531/metadc887206

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  • January 29, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Oct. 6, 2016, 1:54 p.m.

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Robbins, D. L.; Beiersdorfer, P.; Faenov, A. Y.; Pikuz, T. A.; Thorn, D. B.; Chen, H. et al. Polarization measurements of the Lyman-(alpha)1 x-ray emission lines of hydrogenlike Ar17+ and Fe25+ at high electron impact energies, article, January 29, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc887206/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.